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Arenicolidae Stock Photos and Images
RM2HA4TG3–sandworm,arenicolidae,wadden sea,st. peter ording,north sea,schleswig-holstein,germany,summer
RFTCF6XH–Traces of lugworms (Arenicolidae) at low tide in the sand, Playa Samara, Samara, Nicoya Peninsula, Guanacaste Province, Costa Rica, Central America
RMCC06AR–European Lugworm (Arenicola marina) cast of defaecated sediment on beach at low tide, North Sea, Belgium
RMCC06AD–European Lugworm / sandworm (Arenicola marina) casts of defaecated sediment on beach at low tide along the North Sea coast
RFPRTEMY–Sandworm (Arenicola marina) burying itself into the sand, Wadden Sea, Schleswig-Holstein, Germany
RMP99N6H–Lugworm / sandworm (Arenicola marina), large marine worm's casts of defecated sediment on beach at low tide along the North Sea coast
RF2PHFN56–Lugworm (Arenicola marina) animal in exposed burrow in sand on the lower shore of a beach, Northumberland, England, February 2020
RF2PD62TJ–Sandy beach at low tide covered in the messy spaghetti-style casts of blow lugworms (Arenicola marina) type of sandworm, footprint for size comparison
RFTCF6XD–Traces of lugworms (Arenicolidae) at low tide in the sand, Playa Samara, Samara, Nicoya Peninsula, Guanacaste Province, Costa Rica, Central America
RME87PK2–European Lugworm (Arenicola marina) cast of defaecated sediment on beach at low tide, coast the Gann Pembrokshire Wales UK
RMAMB2WA–dh Lugworm WORMS UK Arenicola marina sand casts on sandy beach Waulkmill bay Orkney close up scottish marine life mudflat
RM2M2JA94–Lugworm / sandworm (Arenicola marina), large marine worm's casts of defecated sediment on beach at low tide along the North Sea coast | Excréments / tortillons d'Arenicola marina / ver de vase / ver noir sur la plage 16/07/2018
RMBKABR2–Lugworm Arenicola marina Casts And Holes At New Brighton, Wallasey, The Wirral, Merseyside, UK
RMF0Y011–Oct. 15, 2014 - Black Sea, Ukraine - Jelly-like eggs of unknown origin, Black Sea, Crimea, Ukraine, Eastern Europe (Credit Image: © Andrey Nekrasov/ZUMA Wire/ZUMAPRESS.com)
RMRGTFA3–Lugworm (Arenicola marina) heaps on the surface of the Wadden Sea sand colored by gold-brown microalgae, Wadden Sea, Schleswig-Holstein, Germany
RMP99N6A–Lugworm / sandworm (Arenicola marina), large marine worm's casts of defecated sediment on beach at low tide along the North Sea coast
RMW7W650–Lugworm (Arenicola maritima) feeding depression on sandy shore at low tide, Colwyn Bay, Wales, UK. May.
RM2ANC61P–Sea and inland fisheries: report . POLYCHABTA OF THE COASTS OF IRELAND.I.—ARENICOLIDAE AND SCALIBREGMIDAE. BY J. H. Ashworth, D.Sc,University of Edinburgh. In response to my enquiry for permission to examine the collectionof Arenicolidae and Scalibregmidae from the Irish coast in theNational Museum, Dublin, Dr. R. F. Scharff kindly sent to me thespecimens described below. All of these, except the examples ofArenicola marina from Dublin Bay, have been collected by theFisheries Branch of the Department of Agriculture and TechnicalInstruction for Ireland. I have taken the opportunity of bringingt
RF2G3PFY5–W.B.Yeats Man Who Dreamed of Faeryland hears a lug-worm with its grey and muddy mouth -sang that somewhere to north or west or south -
RMAMB2WB–dh Lugworm WORMS MARINE LIFE Arenicola marina sand casts on sandy beach Waulkmill bay Orkney
RM2M2JA8D–Lugworm / sandworm (Arenicola marina), large marine worm's casts of defecated sediment on beach at low tide along the North Sea coast | Excréments / tortillons d'Arenicola marina / ver de vase / ver noir sur la plage 16/07/2018
RMF0XYTM–Oct. 15, 2014 - Black Sea, Ukraine - Jelly-like eggs of unknown origin, Black Sea, Crimea, Ukraine, Eastern Europe (Credit Image: © Andrey Nekrasov/ZUMA Wire/ZUMAPRESS.com)
RMP99N6D–Lugworm / sandworm (Arenicola marina), large marine worm's casts of defecated sediment on beach at low tide along the North Sea coast
RMW7W653–Lugworm (Arenicola maritima) cast and feeding depression on sandy shore at low tide, Colwyn Bay, Wales, UK. May.
RM2FM9HYF–European lugworm / sandworm (Arenicola marina) feeding pits in sand and casts of defaecated sediments on the beach at low tide
RMW85E58–Lugworm (Arenicola marina) cast on beach, on beach of Wadden sea, Heligoland, Germany, June.
![. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 60 Arenicolidae and these are subdivided into only two to four gill-filaments. These gills have therefore a bushy appearance. The gills of A. assimilis and of the examples of the var. affinis from Auckland Island are similar to those of the littoral form of A. marina, from which they differ only in the absence of " webbing " at the base of the gill-axes. The gill-filaments of most of the specimens examined are elongate, almost as long relatively as those shown in Fig. 31. Examples of A. as Stock Photo](https://c8.alamy.com/comp/RFA8X1/catalogue-of-the-chaetopoda-in-the-british-museum-natural-history-oligochaeta-polychaeta-60-arenicolidae-and-these-are-subdivided-into-only-two-to-four-gill-filaments-these-gills-have-therefore-a-bushy-appearance-the-gills-of-a-assimilis-and-of-the-examples-of-the-var-affinis-from-auckland-island-are-similar-to-those-of-the-littoral-form-of-a-marina-from-which-they-differ-only-in-the-absence-of-quot-webbing-quot-at-the-base-of-the-gill-axes-the-gill-filaments-of-most-of-the-specimens-examined-are-elongate-almost-as-long-relatively-as-those-shown-in-fig-31-examples-of-a-as-RFA8X1.jpg ". Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 60 Arenicolidae and these are subdivided into only two to four gill-filaments. These gills have therefore a bushy appearance. The gills of A. assimilis and of the examples of the var. affinis from Auckland Island are similar to those of the littoral form of A. marina, from which they differ only in the absence of " webbing " at the base of the gill-axes. The gill-filaments of most of the specimens examined are elongate, almost as long relatively as those shown in Fig. 31. Examples of A. as Stock Photo")
RMRFA8X1–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 60 Arenicolidae and these are subdivided into only two to four gill-filaments. These gills have therefore a bushy appearance. The gills of A. assimilis and of the examples of the var. affinis from Auckland Island are similar to those of the littoral form of A. marina, from which they differ only in the absence of " webbing " at the base of the gill-axes. The gill-filaments of most of the specimens examined are elongate, almost as long relatively as those shown in Fig. 31. Examples of A. as
RM2M2JA8F–Lugworm / sandworm (Arenicola marina), large marine worm's casts of defecated sediment on beach at low tide along the North Sea coast | Excréments / tortillons d'Arenicola marina / ver de vase / ver noir sur la plage 16/07/2018
RM2FM9HYG–European lugworm / sandworm (Arenicola marina) feeding pits in sand and casts of defaecated sediments on the beach at low tide
![. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 60 Arenicolidae and these are subdivided into only two to four gill-filaments. These gills have therefore a bushy appearance. The gills of A. assimilis and of the examples of the var. affinis from Auckland Island are similar to those of the littoral form of A. marina, from which they differ only in the absence of " webbing " at the base of the gill-axes. The gill-filaments of most of the specimens examined are elongate, almost as long relatively as those shown in Fig. 31. Examples of A. as Stock Photo](https://c8.alamy.com/comp/RF1D8N/catalogue-of-the-chaetopoda-in-the-british-museum-natural-history-oligochaeta-polychaeta-60-arenicolidae-and-these-are-subdivided-into-only-two-to-four-gill-filaments-these-gills-have-therefore-a-bushy-appearance-the-gills-of-a-assimilis-and-of-the-examples-of-the-var-affinis-from-auckland-island-are-similar-to-those-of-the-littoral-form-of-a-marina-from-which-they-differ-only-in-the-absence-of-quot-webbing-quot-at-the-base-of-the-gill-axes-the-gill-filaments-of-most-of-the-specimens-examined-are-elongate-almost-as-long-relatively-as-those-shown-in-fig-31-examples-of-a-as-RF1D8N.jpg ". Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 60 Arenicolidae and these are subdivided into only two to four gill-filaments. These gills have therefore a bushy appearance. The gills of A. assimilis and of the examples of the var. affinis from Auckland Island are similar to those of the littoral form of A. marina, from which they differ only in the absence of " webbing " at the base of the gill-axes. The gill-filaments of most of the specimens examined are elongate, almost as long relatively as those shown in Fig. 31. Examples of A. as Stock Photo")
RMRF1D8N–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 60 Arenicolidae and these are subdivided into only two to four gill-filaments. These gills have therefore a bushy appearance. The gills of A. assimilis and of the examples of the var. affinis from Auckland Island are similar to those of the littoral form of A. marina, from which they differ only in the absence of " webbing " at the base of the gill-axes. The gill-filaments of most of the specimens examined are elongate, almost as long relatively as those shown in Fig. 31. Examples of A. as
RM2FM9HYY–European lugworm / sandworm (Arenicola marina) casts of defaecated sediments on the beach at low tide
RMRF1DA4–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 54 Arenicolidae has, when unworn, a slender and slightly upturned tip (Fig. 29), which, however, is soon worn away when the crotchet comes into use. Fig. 30 represents the latest growth-phase found in the crotchets of these species.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ashworth, James Hartley, 1874-1936; Ashworth, Jam
RM2FM9HYT–European lugworm / sandworm (Arenicola marina) cast of defaecated sediment on the beach at low tide
RMRFA8Y9–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 54 Arenicolidae has, when unworn, a slender and slightly upturned tip (Fig. 29), which, however, is soon worn away when the crotchet comes into use. Fig. 30 represents the latest growth-phase found in the crotchets of these species.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ashworth, James Hartley, 1874-1936; Ashworth, Jam
RM2FM9HYP–European lugworm / sandworm (Arenicola marina) cast of defaecated sediment on the beach at low tide
RM2FM9HYN–European lugworm / sandworm (Arenicola marina) feeding pit in sand and casts of defaecated sediment on the beach at low tide
RMBEMM16–Lugworm / sandworm (Arenicola marina) burrow showing blow hole and cast of defaecated sediment on beach along North Sea coast
RMRF1DDA–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 44 Arenicolidae absence of a lamina along the distal portion, and in the nature and comparative abundance of the processes present in that region of the chaeta. The most highly developed notopodial chaetae present in the genus are found in A. loveni. In the notopodia of this (and some other) species the chaetae seem to be in two more or less distinct series, an anterior and a posterior; the chaetae of the anterior are shorter than those of the posterior row, but they have the same form and structura
RMBEMM56–Lugworm / sandworm (Arenicola marina) burrow showing blow hole and cast of defaecated sediment on beach along North Sea coast
RMRFA917–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 44 Arenicolidae absence of a lamina along the distal portion, and in the nature and comparative abundance of the processes present in that region of the chaeta. The most highly developed notopodial chaetae present in the genus are found in A. loveni. In the notopodia of this (and some other) species the chaetae seem to be in two more or less distinct series, an anterior and a posterior; the chaetae of the anterior are shorter than those of the posterior row, but they have the same form and structura
RMBGKH3P–European Lugworm (Arenicola marina) casts of defaecated sediments on the beach along the North Sea coast
RMRF1D9J–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 56 Arenicolidae may be looked for, in the first instance on the sixteenth to nineteenth segments inclusive. Subsequently gills are formed on the succeeding segments, but a considerable period elapses before the posterior segments acquire their branchiae; for instance, in a specimen 15 mm. long, with sixty-four segments, the last twenty segments are still abranchiate. The gills are well supplied with blood- vessels and are, therefore, generally red in colour, but in old specimens they become pigmente
RMBEMNNF–Lugworm / sandworm (Arenicola marina) burrow showing blow hole and cast of defaecated sediment on beach along North Sea coast
RMRFAHP3–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 116 Arenicolidae clearly visible in each segment, those of the posterior branchial region are short and do not approach the mid-ventral line ; the distal part of each crotchet has a form resembling that of a swan's head, that is, the region just proximal to the rostrum of the crotchet has. Fig. 48.—A.pusilla, from California. Anterior end, dorsal aspect; show- ing the large and folded lateral lobes of the prostomluin.. Please note that these images are extracted from scanned page images that may hav
RMEXRPB4–European lug worm / lugworm / sandworm (Arenicola marina) cast of defaecated sediment on beach along North Sea coast
RMRF1D7R–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 68 Arenicolidae. St.T. Fig. 37.—A. Miarina. Statoliths, and cuticular lininji of statocysts, of specimens from Jersuy (A), and Trieste (B). ST.T. Tube leading to exterior.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ashworth, James Hartley, 1874-1936; Ashworth, James Hartley. London, Printed by Order of the Trustees of the B
RMEXRPB7–European lug worm / lugworm / sandworm (Arenicola marina) burrows showing head end (blow hole) and casts of defaecated sediment
RMRF1D6E–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 70 Arenicolidae single statolith throughout life. In A. ecaudata and brancJiialis (Fig. 41) there is at first only one statolith. Later many others are formed, but the original one remains conspicuous by reason of its larger size. The statocysts of A. assimilis attain a much larger size than those of any other species : indeed, they are the largest known in the Polychaeta. There is some difference in the size of these organs in similar specimens of the same species from different localities. Fig. 38
RMEXRPB6–European lug worm / lugworm / sandworm (Arenicola marina) burrows showing head end (blow hole) and casts of defaecated sediment
RMRFAHN1–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 118 Arenicolidae nuchal organ. There are six pairs of nephridia, opening on the fourth to ninth segments, twelve oesophageal glands, six on each side, and no septal pouches. Careful search failed to reveal the presence of stato- M.G. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ashworth, James Hartley, 1874-1936; Ashworth, Jam
RMRFAHW0–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 70 Arenicolidae single statolith throughout life. In A. ecaudata and brancJiialis (Fig. 41) there is at first only one statolith. Later many others are formed, but the original one remains conspicuous by reason of its larger size. The statocysts of A. assimilis attain a much larger size than those of any other species : indeed, they are the largest known in the Polychaeta. There is some difference in the size of these organs in similar specimens of the same species from different localities. Fig. 38
RMRF1D42–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 116 Arenicolidae clearly visible in each segment, those of the posterior branchial region are short and do not approach the mid-ventral line ; the distal part of each crotchet has a form resembling that of a swan's head, that is, the region just proximal to the rostrum of the crotchet has. Fig. 48.—A.pusilla, from California. Anterior end, dorsal aspect; show- ing the large and folded lateral lobes of the prostomluin.. Please note that these images are extracted from scanned page images that may hav
RMRF1D38–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 118 Arenicolidae nuchal organ. There are six pairs of nephridia, opening on the fourth to ninth segments, twelve oesophageal glands, six on each side, and no septal pouches. Careful search failed to reveal the presence of stato- M.G. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ashworth, James Hartley, 1874-1936; Ashworth, Jam
RMRFA8XT–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 56 Arenicolidae may be looked for, in the first instance on the sixteenth to nineteenth segments inclusive. Subsequently gills are formed on the succeeding segments, but a considerable period elapses before the posterior segments acquire their branchiae; for instance, in a specimen 15 mm. long, with sixty-four segments, the last twenty segments are still abranchiate. The gills are well supplied with blood- vessels and are, therefore, generally red in colour, but in old specimens they become pigmente
RMRFA8W1–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 68 Arenicolidae. St.T. Fig. 37.—A. Miarina. Statoliths, and cuticular lininji of statocysts, of specimens from Jersuy (A), and Trieste (B). ST.T. Tube leading to exterior.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ashworth, James Hartley, 1874-1936; Ashworth, James Hartley. London, Printed by Order of the Trustees of the B
RMRF1DCN–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 48 Arenicolidae the ecaudate species have, along one side, a narrow lamina (2 to 4 /x wide), which, however, soon breaks up into fine teeth (see the left proximal portion of Tig. 16 a). The opposite side of the chaeta bears longer spines. Towards the tip the shaft of the chaeta appears to be encircled by series of spines (Sageblatter), which can be resolved only with difficulty (Fig. 16 b). The only species of Arenicola in which the uotopodial chaetae present characters sufficiently striking and def
RMRF1DDT–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 40 Arenicolidae mens of A. ecaudata. I also found crotchets^ in the posterior notopodia of a post-larval A. ecaudata, 8 mm. in length. This. Fig. 5.—A. ecaudata. Outline of the posterior end of a post-larval specimen, 8 mm. long, to show the chaetae. specimen has recently been subjected to further clearing, and this has rendered it possible to get a better view of the dorsal crotchets, which are not as short as they are drawn in the figure cited. Fig. 5 is a more accurate representation of this spec
RMRFA91M–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 40 Arenicolidae mens of A. ecaudata. I also found crotchets^ in the posterior notopodia of a post-larval A. ecaudata, 8 mm. in length. This. Fig. 5.—A. ecaudata. Outline of the posterior end of a post-larval specimen, 8 mm. long, to show the chaetae. specimen has recently been subjected to further clearing, and this has rendered it possible to get a better view of the dorsal crotchets, which are not as short as they are drawn in the figure cited. Fig. 5 is a more accurate representation of this spec
![. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 150 Arenicolidae They are not so markedly different as his figures imply. In each notopodium (Fig. 60) there are from two to four, occasionally five, straight or slightly curved chaetae of the type shown in Fig. 62 b, and a similar number of chaetae, each of which is bent so that the Fig. 61.—B. vincentiyas. (" Clymenides incer- tits"). Notopodial chaeta.. Fig. 62.—B. vincenti. Tlie distal portions— in eacli case about tliree-flftlis—of tliiee notopodial chaetae. B, C. Typical adult chaeta Stock Photo](https://c8.alamy.com/comp/RFAHHM/catalogue-of-the-chaetopoda-in-the-british-museum-natural-history-oligochaeta-polychaeta-150-arenicolidae-they-are-not-so-markedly-different-as-his-figures-imply-in-each-notopodium-fig-60-there-are-from-two-to-four-occasionally-five-straight-or-slightly-curved-chaetae-of-the-type-shown-in-fig-62-b-and-a-similar-number-of-chaetae-each-of-which-is-bent-so-that-the-fig-61b-vincentiyas-quot-clymenides-incer-titsquot-notopodial-chaeta-fig-62b-vincenti-tlie-distal-portions-in-eacli-case-about-tliree-flftlisof-tliiee-notopodial-chaetae-b-c-typical-adult-chaeta-RFAHHM.jpg ". Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 150 Arenicolidae They are not so markedly different as his figures imply. In each notopodium (Fig. 60) there are from two to four, occasionally five, straight or slightly curved chaetae of the type shown in Fig. 62 b, and a similar number of chaetae, each of which is bent so that the Fig. 61.—B. vincentiyas. (" Clymenides incer- tits"). Notopodial chaeta.. Fig. 62.—B. vincenti. Tlie distal portions— in eacli case about tliree-flftlis—of tliiee notopodial chaetae. B, C. Typical adult chaeta Stock Photo")
RMRFAHHM–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 150 Arenicolidae They are not so markedly different as his figures imply. In each notopodium (Fig. 60) there are from two to four, occasionally five, straight or slightly curved chaetae of the type shown in Fig. 62 b, and a similar number of chaetae, each of which is bent so that the Fig. 61.—B. vincentiyas. (" Clymenides incer- tits"). Notopodial chaeta.. Fig. 62.—B. vincenti. Tlie distal portions— in eacli case about tliree-flftlis—of tliiee notopodial chaetae. B, C. Typical adult chaeta
![. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 150 Arenicolidae They are not so markedly different as his figures imply. In each notopodium (Fig. 60) there are from two to four, occasionally five, straight or slightly curved chaetae of the type shown in Fig. 62 b, and a similar number of chaetae, each of which is bent so that the Fig. 61.—B. vincentiyas. (" Clymenides incer- tits"). Notopodial chaeta.. Fig. 62.—B. vincenti. Tlie distal portions— in eacli case about tliree-flftlis—of tliiee notopodial chaetae. B, C. Typical adult chaeta Stock Photo](https://c8.alamy.com/comp/RF1D01/catalogue-of-the-chaetopoda-in-the-british-museum-natural-history-oligochaeta-polychaeta-150-arenicolidae-they-are-not-so-markedly-different-as-his-figures-imply-in-each-notopodium-fig-60-there-are-from-two-to-four-occasionally-five-straight-or-slightly-curved-chaetae-of-the-type-shown-in-fig-62-b-and-a-similar-number-of-chaetae-each-of-which-is-bent-so-that-the-fig-61b-vincentiyas-quot-clymenides-incer-titsquot-notopodial-chaeta-fig-62b-vincenti-tlie-distal-portions-in-eacli-case-about-tliree-flftlisof-tliiee-notopodial-chaetae-b-c-typical-adult-chaeta-RF1D01.jpg ". Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 150 Arenicolidae They are not so markedly different as his figures imply. In each notopodium (Fig. 60) there are from two to four, occasionally five, straight or slightly curved chaetae of the type shown in Fig. 62 b, and a similar number of chaetae, each of which is bent so that the Fig. 61.—B. vincentiyas. (" Clymenides incer- tits"). Notopodial chaeta.. Fig. 62.—B. vincenti. Tlie distal portions— in eacli case about tliree-flftlis—of tliiee notopodial chaetae. B, C. Typical adult chaeta Stock Photo")
RMRF1D01–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 150 Arenicolidae They are not so markedly different as his figures imply. In each notopodium (Fig. 60) there are from two to four, occasionally five, straight or slightly curved chaetae of the type shown in Fig. 62 b, and a similar number of chaetae, each of which is bent so that the Fig. 61.—B. vincentiyas. (" Clymenides incer- tits"). Notopodial chaeta.. Fig. 62.—B. vincenti. Tlie distal portions— in eacli case about tliree-flftlis—of tliiee notopodial chaetae. B, C. Typical adult chaeta
RMRF1DDF–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. Arenicolidae u. Fig. 9.— A. marina. Notopodial Fig. 10.—A. ecaudata. Distal halves of notopoilial ehaetae from cliaetae of a post-larval specimen, post-larval specimens about 7 nun. lonj.;-. 4'3 mm. loug.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ashworth, James Hartley, 1874-1936; Ashworth, James Hartley. London, Printed
RMRFA91B–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. Arenicolidae u. Fig. 9.— A. marina. Notopodial Fig. 10.—A. ecaudata. Distal halves of notopoilial ehaetae from cliaetae of a post-larval specimen, post-larval specimens about 7 nun. lonj.;-. 4'3 mm. loug.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ashworth, James Hartley, 1874-1936; Ashworth, James Hartley. London, Printed
RMRFA90G–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 48 Arenicolidae the ecaudate species have, along one side, a narrow lamina (2 to 4 /x wide), which, however, soon breaks up into fine teeth (see the left proximal portion of Tig. 16 a). The opposite side of the chaeta bears longer spines. Towards the tip the shaft of the chaeta appears to be encircled by series of spines (Sageblatter), which can be resolved only with difficulty (Fig. 16 b). The only species of Arenicola in which the uotopodial chaetae present characters sufficiently striking and def
RMRFA907–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 50 Arenicolidae number, (2) gradual reduction and eventual loss of. the teeth behind the rostrum, (3) increase of the angle between the rostrum and shaft, and (4) elongation of the rostral region, which is seen only in crotchets from very large specimens. The crotchets of other species of Arenicola exhibit corre- sponding changes. A. assimilis}—Crotchets from a post-larval example of the var. afinis, 7' 6 mm. long, are shown in Fig. 21. The left one is drawn with the rostrum almost in optical sec- t
RMRF1DCC–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 50 Arenicolidae number, (2) gradual reduction and eventual loss of. the teeth behind the rostrum, (3) increase of the angle between the rostrum and shaft, and (4) elongation of the rostral region, which is seen only in crotchets from very large specimens. The crotchets of other species of Arenicola exhibit corre- sponding changes. A. assimilis}—Crotchets from a post-larval example of the var. afinis, 7' 6 mm. long, are shown in Fig. 21. The left one is drawn with the rostrum almost in optical sec- t
RMRF1DAE–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 52 Arenicolidae a massive Floridaii example 330 mm. long, the shaft and rostrum are practically in line, and merge into each other. The tip of the rostrum, shown in Fig. 26 E, which represents the end of a newly-. Fig. 2Z.—A. glacialis. A, Young crotchet; B, later phase ; C, Latest phase of growth found. formed, unused crotchet, soon wears away, leaving a rounded end (Fig. 26 D). The crotchets of A. cristata are intermediate between those. Please note that these images are extracted from scanned pag
RMRF1CYH–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 154 Arenicolidae maldanc are relatively very large. A mature specimen of Arenicola may contain several or many thousands of full-grown oocytes, but a mature specimen of B. vinccnti contains comparatively few—about 120 were found in one specimen. The eggs of B. vincenti escape by rupture of the body-wall in one or more of tlie posterior segments. Sp. DV.. NEUrt M.Ob. - M.ClRC. -- M.Long. Fig. C7.—/>. vincenti. Transverse section througli the fortietli segment. D.V. Dorsal blood-vessel; Ep. Epiderm
RMRFAHH6–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 154 Arenicolidae maldanc are relatively very large. A mature specimen of Arenicola may contain several or many thousands of full-grown oocytes, but a mature specimen of B. vinccnti contains comparatively few—about 120 were found in one specimen. The eggs of B. vincenti escape by rupture of the body-wall in one or more of tlie posterior segments. Sp. DV.. NEUrt M.Ob. - M.ClRC. -- M.Long. Fig. C7.—/>. vincenti. Transverse section througli the fortietli segment. D.V. Dorsal blood-vessel; Ep. Epiderm
RMRFA8YM–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 52 Arenicolidae a massive Floridaii example 330 mm. long, the shaft and rostrum are practically in line, and merge into each other. The tip of the rostrum, shown in Fig. 26 E, which represents the end of a newly-. Fig. 2Z.—A. glacialis. A, Young crotchet; B, later phase ; C, Latest phase of growth found. formed, unused crotchet, soon wears away, leaving a rounded end (Fig. 26 D). The crotchets of A. cristata are intermediate between those. Please note that these images are extracted from scanned pag
RMRF1DD1–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 46 Arenicolidae The chaetae of A. marina, 'pusilla and assimilis possess, along one side of their distal fourth or fifth, a thin lamina, which, in large r X80O. i K Fig. 13.—A. marina(250 mm. long). A, Distal fourth of a notopodial chaeta ; B, Tlie re- gion marked + in A more highly magnified. I'ig. 14.—A. assimilis var. ajfinis (250 mm. long, from Otago Harbour, N.Z.). A, Distal third of a notopodial chaeta ; B, The re- gion marked H- in A more highly magnified.. Please note that these images are e
RMRFA90W–. Catalogue of the Chaetopoda in the British Museum (Natural History). Oligochaeta; Polychaeta. 46 Arenicolidae The chaetae of A. marina, 'pusilla and assimilis possess, along one side of their distal fourth or fifth, a thin lamina, which, in large r X80O. i K Fig. 13.—A. marina(250 mm. long). A, Distal fourth of a notopodial chaeta ; B, Tlie re- gion marked + in A more highly magnified. I'ig. 14.—A. assimilis var. ajfinis (250 mm. long, from Otago Harbour, N.Z.). A, Distal third of a notopodial chaeta ; B, The re- gion marked H- in A more highly magnified.. Please note that these images are e
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