130 SAUKOPTEKYGIA. 



** Pliosaurus grossouvrei (Sauvage 1 ). 



Syn. Liopleurodon grossouvrei, Sauvage 2 . 

 ? Spondylosaurus fearsi, Fischer 3 . 

 (?) Pliosaurus loosinskii, Fischer 4 . 



Founded upon teeth (fig. 40), in which the smooth surface is 

 convex from side to side, and the carinas are not very prominent. 

 The hinder teeth (judging from the next form) had no carinas and 

 were ridged on all sides. 



These teeth, which approximate in structure to those of Pelo- 

 neustes philarchus, are very probably specifically identical with 

 P. evansi. The type specimen is from the Kelloway Eock (Middle 

 Jurassic). 



Fig. 40. 



Pliosaurus grossouvrei.— Crown of a tooth ; from the Coral Rag 

 of Wiltshire. \. 



Spondylosaurus fearsi was founded upon two late cervical vertebras 

 of a small Pliosaur from the Jurassic of Eussia, which are probably 

 specifically the same as the teeth from the same deposits subsequently 

 described under the name of Pliosaurus wosinslcii. The latter closely 

 resemble those of the present form. If all the above-mentioned 

 forms be specifically the same, the name fearsi has the right of 

 priority. S. fearsi is the type of the genus Spondylosaurus, 



Hab. Europe (France, England, and [?] Eussia). 



1 Bull. Soc. G-eol. France, ser. 3, yol. i. p. 379 (1873). — Liopleurodon. 



2 Log. cit. 



3 Bull. Soc. Moscou, vol. xviii. pt. i. p. 350 (1845). 



4 Ibid. vol. xix. pt. ii. p. 105 (1846). 



