Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . Soc. for 1853, p. 7 (1854).—Plesiosaurus. See Blake inTate and Blakes Yorkshire Lias, p. 249 (1870).—P. zetlandL 3 In this description it appears that V. megacephalua has been confused withPlesiosaurus macrocephalus. 168 SAUEOPTERYGIA. Thaumatosaurus carinatus (Cuvier1). Syn. Plesiosaurus carinatus, Cuvier2. Imperfectly known, but apparently of the approximate size ofT. indicus. The cervical vertebrae have a very prominent haemalcarina, with a deep pit on either side. Hah. Europe (F
Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural history) ..By Richard Lydekker .. . Soc. for 1853, p. 7 (1854).—Plesiosaurus. See Blake inTate and Blakes Yorkshire Lias, p. 249 (1870).—P. zetlandL 3 In this description it appears that V. megacephalua has been confused withPlesiosaurus macrocephalus. 168 SAUEOPTERYGIA. Thaumatosaurus carinatus (Cuvier1). Syn. Plesiosaurus carinatus, Cuvier2. Imperfectly known, but apparently of the approximate size ofT. indicus. The cervical vertebrae have a very prominent haemalcarina, with a deep pit on either side. Hah. Europe (France and England). R. 1066. The centrum of an immature cervical vertebra; probablyfrom the Kimeridge Clay of England. This specimen,which is apparently late in the series, agrees almostexactly with the immature type cervical from theKimeridgian of Boulogne, which is figured by Sauvagein the Ann. Sci. Nat.—Zool. ser. 6, vol. viii. pi. 2 (1879), of which the dimensions are:—length0,013 (1-7 inches), height 0,055 (2-15 inches), width0,058 (2*3 inches). In the type the division of the costal. Thaumafcsaurus (of.) carinatus.—Anterior and left lateral aspects of the cen-trum and base of the arch of a cervical vertebra; from the KimeridgeClay of Shotover. \. co, costal facets. facet is not clearly shown, although this is indicated byits vertical dimension ; in the present specimen thedivision is very distinct. The pits on either side of thecarina are very deep, and the rugosities on the terminalborders of the inferior face very distinct. The cuppingof the terminal faces and the absence of prominence inthe cos Lai facets distinguish this specimen from the cer-vicals of Peloneustes, Purchased. 1888. 1 Ossein ens Fossiles, 2nd ed. vol. v. pt. ii. p. 486 (1824).— Loc. cit. plesiosauhid^:. 169 31908. The centrum and base of the arch of a (middle ?) cervical{Fig.) vertebra, provisionally referred to this species; from theKimeridge Clay of Shotover, near
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