Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . smaller left (?) ischium ; fromKimeridge Bay. Presented by J. O. Mansel-Pleydell, Esq., 1868. 32413. A much smaller left (?) ischium : from the Kimeridge Clayof Boulogne, France. This specimen, which may indicatean immature individual, agrees exactly with the pair ofischia from Shotover, figured by Phillips, op. cit. p. 377,fig. 178. Purchased, 1875. PLESIOSAUKIDJS. 205 Cimoliosaurus eurymerus (PhillipsJ).Syn. Pleswsaurus eurymerus, Phillips2. Considerably smaller than the preceding
Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . smaller left (?) ischium ; fromKimeridge Bay. Presented by J. O. Mansel-Pleydell, Esq., 1868. 32413. A much smaller left (?) ischium : from the Kimeridge Clayof Boulogne, France. This specimen, which may indicatean immature individual, agrees exactly with the pair ofischia from Shotover, figured by Phillips, op. cit. p. 377,fig. 178. Purchased, 1875. PLESIOSAUKIDJS. 205 Cimoliosaurus eurymerus (PhillipsJ).Syn. Pleswsaurus eurymerus, Phillips2. Considerably smaller than the preceding. Number of cervicalvertebrae unknown. Humerus (fig. 66) relatively short, with thedistal expansion as much marked on the preaxial as on the post-axial border, and articulating distally only with the radius andulna, of which the former is elongated, with an oblique superiorborder and a narrow distal extremity, while the latter is very shortand much elongated transversely. This species was founded upon a pectoral limb from the OxfordClay of Bedford, of which a cast is figured on p. 315 of Phillipss Fig. Cimoliosaurus eurymerus.—Ventral aspect of the right pectoral limb ; from theOxford Clay of Peterborough. About ,V h, humerus ; tr% trochanter ofdo. ; r, radius; u, ulna; i, intermedium ; r, radiale ; u\ ulnare. Geology of Oxford as a pelvic limb. In that specimen, whichappears to have been somewhat restored, the proximal extre-mity of the humerus is imperfect, and the contour of. the radiusand ulna is somewhat different from that of the correspond-ing bones of the pectoral limb represented in fig. 66. This, how- 1 Geology of Oxford, p. 315 (1871).—Plesiosaun/s. 2 Loc. cit. 206 SATJROPTERYGIA. ever, may partly be accounted for by the crushing to which thetype specimen has evidently been subject, and partly to individualvariations, such as are shown in specimens in the collection ofMr. Leeds. The type humerus has a length of 0,406 (16 inches) anda distal diameter of 0,287
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