. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 74 Dr. J. E. Gray on Spatulemys Lasalfc. in the ' Proc. Amer. Phil, Soc' for 18G9, p. 147 ; but it lias a nuchal plate in the margin, and only live vertebral plates, and is quite distinct from the genus Ilz/dromedusa. The mouth is semicircular in front, with the gape wide. The palate is broad, flat, with the internal nostrils oval, rather near together, rather before the hinder end of the alveolar surface. Alveolar surfaces flat, broad, well separated from one another in front
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 74 Dr. J. E. Gray on Spatulemys Lasalfc. in the ' Proc. Amer. Phil, Soc' for 18G9, p. 147 ; but it lias a nuchal plate in the margin, and only live vertebral plates, and is quite distinct from the genus Ilz/dromedusa. The mouth is semicircular in front, with the gape wide. The palate is broad, flat, with the internal nostrils oval, rather near together, rather before the hinder end of the alveolar surface. Alveolar surfaces flat, broad, well separated from one another in front, broadest about one third their length from the front, and rather more than half the width behind, with a rounded outline. Lower jaw with a slightly concave alveolar surface, which is of the same breadth the whole of its length, and has a well developed raised sharp edge on the outer circumference and a less developed one on the inner margin. There is a well-marked conical tooth-like promi- nence in the front of the middle of the outer The upper and lower jaws of Sptduh'tiii/s Lasahe. The upper and lower jaws of Jli/draspis 7'amc('2)s. The alveolar surface, as seen in the stuffed specimen, is very like that of the skeleton of Hi/drasjns raniceps: but the alveo- lar plates of the upper jaw of the latter species are well separated in the middle, and the internal nostrils are much further back in the palate; and the alveolar edge of the lower jaw is even—and not with the rounded tubercle on each side, rather behind the central tube. In Hydrasiyis Gordonii (P. Z. S. 1868, p. 503) the alveo- lar plates of each side of the upper jaw are separated by a narrow linear space ; they are moderately wide and nearly the same width for the whole length, truncated at the front end, and gradually rounded off at the hinder end. The internal. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appear
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