File:CRINOIDS AILSA M. CLARK.jpg
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DescriptionCRINOIDS AILSA M. CLARK.jpg |
English: Title: Bulletin of the British Museum (Natural History)
Identifier: bulletinofbritis24muse Year: 1972 - 1973 (1970s) Authors: British Museum (Natural History) Subjects: Publisher: London : BM(NH) Contributing Library: Natural History Museum Library, London Digitizing Sponsor: Natural History Museum Library, London View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: FOSSIL AND RECENT COMATULID CRINOIDS WITH COELOMIC EXTENSIONS PENETRATING THE CENTRODORSAL Bv AILSA M. CLARK In 1877 Ludwig published an anatomical study of the dorsal or chambered organ and associated structures of Antedon rosacea (i.e. A. meditenanea (Lamarck)) made on sections of decalciiied material. He showed that there are five bhnd radial coelomic sacs extending from the coelom a short distance downwards (aboraUy) outside the chambered organ (see fig. 3j). On the oral (upper or ventral) face of intact centro- dorsals of Antedon there are five radial depressions to house the ends of these sacs, which depressions are lacking in the majority of recent comatulids. Text Appearing After Image: Fig. I. a, b. ^Glenotremites paradoxus Goldfuss. B.M. Palaeontological Department reg. no. E.297, Upper Chalk, Gravesend, Kent, centrodorsal after ultrasonic cleaning in ventral (a) and dorsal (b) views, c, d. The same of Pterometra pulcJierrhna (A. H. Clark). B.M. Zoological Department reg. no. 1972. 8.21.100, 'Anton Bruun' st. 18A, 07°34'N: gS^oo'E (between Malaya and the Nicobar Islands), 77 metres The scale measures 5 mm. Bull. Br. Mtis. nai. Hist. (Zool.) 24, 9 Note About Images 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. |
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24 January 2021
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