PLESIOSATJEID-E. 



125 



41776 a. The centrum of a posterior cervical vertebra in a some- 

 what crushed condition ; from the Kimeridge Clay of 

 Weymouth, Dorsetshire. Length 0,050 (2 inches), height 

 0,082 (3-24 inches), width 0,108 (4-25 inches). The 

 costal facet appears to be single, and the specimen closely 

 resembles the posterior cervical represented in fig. 38 ; 

 the contour of the terminal face is ellipsoidal, and there is 

 no mammilla round the median pit. Purchased, 1867. 



Fig, 38. 



Pliosaurus brachydirus. — Left lateral (1), anterior (2), and superior (3), aspects 

 of an anterior, and left lateral (1) and anterior (2) aspects of a posterior 

 cervical centrum ; from the Kimeridge Clay of Market-Easen. £. {After 

 Phillips.) 



42282. The centrum of a later cervical vertebra ; from the Kimeridge 

 Clay of the Isle of Portland, Dorsetshire. Length 0,060 

 (2-35 inches), width 0,100 (3-95 inches), height 0,078 

 (3*15 inches). The upper part of the costal facet impinges 



on the facet for the arch. 



Purchased* 1869. 



24684. The centrum of a dorsal vertebra probably belonging to this 

 species ; from the Kimeridge Clay of Wootton-Bassett, 

 Wiltshire. Length 0,083 (3-24 inches), height 0,096 

 (3*34 inches), width 0,1 15 (4*5 inches). The base of the 

 neural canal is comparatively wide, moderately contracted 

 in its anterior third, and Blightly expanded posteriorly. 

 This specimen closely resembles the dorsal from Shotover 

 figured by Phillips on p. 346 as probably belonging to 

 this species ; and agrees in relative size with the preceding 

 vertebra. Cunni nyton Collection. Purchased, 1849. 



