230 SAUROPTEKYGIA. 



41217. The imperfect left scapula and coracoid, associated with 

 No. 41216. So far as can be determined from these 

 specimens the general structure of the pectoral girdle is 

 the same as in other species. Purchased, 1868. 



41215. The distal extremity and part of the shaft of a humerus or 

 femur. This specimen was associated with No. 41217, and 

 agrees in relative size with the following specimen. 



Purchased, 1868. 



40640. Slab exhibiting the veutral aspect of the proximal portion 

 (Pig.) of the right pelvic limb. The type specimen. Figured by 

 Owen in his ' Reptilia of the Kimeridge Clay,' pt. iii. 

 pi. iv. ; a reduced figure of the distal portion being given 

 by Hulke in the ' Proc. Geol. Soc' for 1883, p. 54, fig. 8, 

 with a revised nomenclature of the component bones 

 (vide supra, p. 120). The close resemblance of this speci- 

 men (fig. 70) to the limb figured by Kiprijanoff in the 

 1 Mem. Ac. Imp. St. Petersbourg,' vol. xxxi. art. 6, pi. xix. 

 fig. 1, as Luikesaurus (vide supra, p. 172), can leave no 

 doubt as to the near alliance of their respective owners. 

 This specimen is noticed by Seeley in the ' Ann. IVlag. Nat. 

 Hist.' ser. 4, vol. viii. p. 181, where its resemblance to 

 Plesiosaurus is indicated. Purchased, 1867. 



Cimoliosaurus trimcatus, Lydekker (ex Owen '). 



Syn. Plesiosaurus truncatus, Owen 2 . 



(?) Plesiosaurus subdepressus, Owen 3 . 



(?) Plesiosaurus dcedicomus, Owen 4 . 



Plesiosaurtis plicatus, Phillips 5 {in parte) and Sauvage 6 . 



Imperfectly known, but attaining very large dimensions. Appar- 

 ently closely allied to the following species, but distinguished by its 

 superior size, and by the circumstances that the length of the later 

 cervical centra is on the average somewhat shorter, and the terminal 

 faces are rather flatter. 



The specific name was applied to the centrum of an immature 

 cervical vertebra from the Kimeridge Clay of Oxfordshire ; but it 

 will be convenient to take as the types the series of cervicals in 



1 Cat. Fobs. Eept. Mus. E. College of Surgeons, p. 59 (1854). — Plesiosaurus. 

 Description insufficient. 



2 Log. cit. 3 Ibid. p. 63. 



4 Eep. Brit. Assoc, for 1839, p. 81 (1840). 



5 Geology of Oxford, p. 374 (1871). 



6 Ann. Sci. Nat., Zool. ser. 6, vol. viii. #t. 6, p. 25 (1879). 



