. Catalogue of the chelonians, rhynchocephalians, and crocodiles in the British Museum (Natural History). New ed. By George Albert Boulenger. Chelonia (Genus); Crocodiles; Rhynchocephalia. 1. The rib-like process of tlie nuchal is long and situutt-d beliiiid the marginals in the young, short and extending below llie first marginal in the adult. Neural plates narrow, forming an incom- plete series, five or six in number, the two or three last pairs of costals, and sometimes also the first pair, in contact on the median line; eighth costal sometimes (C odorafinn, C. scorpioides)
. Catalogue of the chelonians, rhynchocephalians, and crocodiles in the British Museum (Natural History). New ed. By George Albert Boulenger. Chelonia (Genus); Crocodiles; Rhynchocephalia. 1. The rib-like process of tlie nuchal is long and situutt-d beliiiid the marginals in the young, short and extending below llie first marginal in the adult. Neural plates narrow, forming an incom- plete series, five or six in number, the two or three last pairs of costals, and sometimes also the first pair, in contact on the median line; eighth costal sometimes (C odorafinn, C. scorpioides) vciy small, and without distal point. Vertebral and costal shields usually imbricate. Limbs and tail scaleless ; two or three curved laraellie on the front of the forearm, and some on the hinder side of the leg. Pig. 1 Shell of Cinosternum leucostomuin. Young specimens of all tlie species are very similar, and their determination meets with great difficulties. There is but a small diflPerence in the size of the plastron between a newly born Cino- sternum of Group 1. of the following synopsis and a corresponding one of Group II., -whilst that between the latter and one of Group IV. is quite insignificant, if at all perceptible. The following synopsis of the species applies therefore only to adult specimens. It must be borne in mind that, as in all Chelonians with hinged plastral lobes, the mobility does not exist in the quite young spe- cimens, and is often scarcely distinct, or restricted to the front lobe only, in the halr'growu. E. 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 British Museum (Natural History). Dept. of Zoology; Boulenger, George Albert, 1858-1937. London Printed by order of the Trustees
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectcheloniagenus, bookye
