plesiosauhid^:. 169 



31908. The centrum and base of the arch of a (middle ?) cervical 

 {Fig.) vertebra, provisionally referred to this species ; from the 

 Kimeridge Clay of Shotover, near Oxford. The dimensions 

 of this specimen (woodcut fig. 57), are : — length 0,045 (1*76 

 inches), height 0,062 (2-45 inches), width 0,068 (2-67 

 inches). The base of the arch is anchylosed to the cen- 

 trum, although the suture persists. The costal articulation 

 is divided into two at the posterior half by a line which 

 does not extend to the anterior border. The haemal 

 carina terminates in a spine on the anterior border. The 

 resemblance to the cervicals of T. oblithicus figured by 

 Meyer in the ' Palaeontographica,' vol. vi. pi. v., is very 

 marked, and the specimen also presents a considerable 

 general resemblance to the preceding, but has nearly 

 circular terminal faces and less distinct haemal pits. It 

 is uncertain whether these points are merely due to 

 difference of serial position or are of specific value. 



Purchased. About 1852 



37300. Two nearly entire late cervical vertebras of a large individual : 

 from the Kimeridge Clay of Boulogne, Prance. These 

 specimens, except for their large size, agree precisely with 

 those of the type, showing the extremely deep pits on 

 either side of the haarnal ridge. The arches are anchylosed 

 to the centra, and the double costal facets are distinctly 

 shown. In the hinder vertebra the terminal faces are 

 ellipsoidal. Purchased, 1863. 



32778. The centrum of a " pectoral " vertebra probably referable 

 to this species; from the Kimeridge Clay of Boulogne. 

 There is a distinct haemal ridge. Purchased. 



41776. The centrum of an anterior dorsal vertebra provisionally 

 referred to the present form ' ; from the Kimeridge Clay 

 of the Isle of Portland, Dorsetshire. Although somewhat 

 smaller this specimen closely resembles the dorsal of thu 

 type species figured by Meyer, op. cit. pi. v. figs. 8-10. 



Purchased, 1860. 



31900. The centrum of a later dorsal vertebra, apparently speci- 

 fically identical with the preceding ; from the Kimeridge 

 Clay of Shotover. Purchased. About l^~>~. 



1 It is not certain that this and the two next specimens are not referable to 

 the so-called Plesiosaunu ellipeoapondylut ('"/'"'"', p- 172). 



