. Catalogue of the chelonians, rhynchocephalians, and crocodiles in the British museum (Natural history). Chelonia (Genus); Rhynchocephalia; Crocodiles. 1. CIXOSTERN'UM. 35 The rib-like process of the nuchal is long and situated beliind the marginals iu the young, short and extending below the first marginal in the adult. N^eural 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 oJoratum, C. scorpioides) very small, and without distal point.
. Catalogue of the chelonians, rhynchocephalians, and crocodiles in the British museum (Natural history). Chelonia (Genus); Rhynchocephalia; Crocodiles. 1. CIXOSTERN'UM. 35 The rib-like process of the nuchal is long and situated beliind the marginals iu the young, short and extending below the first marginal in the adult. N^eural 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 oJoratum, C. scorpioides) very small, and without distal point. Vertebral and costal shields usually imbricate. Limbs and tail scaleless ; two or three curved lamellae on the front of the forearm, and some on the hinder side of the leg. FiL^ Shell of Ciuosternum leHCosfomum. Young specimens of all the species are very similar, and their determination meets with great difficulties. There is but a small difference in the size of the plastron between a newly born C'ino- sternum of Group 1. of the following synopsis and a corresponding one of Gronp 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 Chelouians 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 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
