236 



SATJKOPTERYGIA. 



by Phillips under the name of Plesiosaurus oxoniensis appear referable 

 to the present species. The humerus of the above-mentioned speci- 

 men has a length of 0,292 (11-5 inches), and a diameter at the 

 distal extremity of 0,177 (7 inches). The limb-bones of the 

 undermentioned skeletons agree approximately in size with this 

 humerus ; but it is at present uncertain whether this species may not 

 have attained larger dimensions. Thus an isolated femur from the 

 Oxford Clay of Peterborough, in the collection of Mr. Leeds, agrees 



Fig. 71. 



^feoG 



Cimoliomurus plicaius. — Dorsal aspect of part of the right pectoral limb; from 

 the Oxford Clay, \. h, humerus; r, radius ; u, ulna; r', racliale; ^inter- 

 medium; u', ulnare. 



in contour with the corresponding bone of the present species, but 

 has a length of 0,343 (13-5 inches). In an imperfect skeleton in the 

 same collection (No. 26) indicatiug an allied form the limb-bones 

 differ somewhat from those of typical examples of the present species; 

 the humerus having a length of 0,339 (13*4 inches), and the femur 

 of 0,327 (12-5 inches). 

 Hah. Europe (England). 



R. 1332. Cast of an imperfect late cervical vertebra, probably about 

 the 28th. The original (fig. 72) is one of the two types, 

 and was obtained from the Oxford Clay of Oxfordshire. 

 It is preserved in the Museum at Oxford, and is figured 

 on p. 313 of Phillips's ' Geology of Oxford,' The dimensions 



