PLESIOSAUKIDJS. 205 



Cimoliosaurus eurymerus (Phillips J ). 

 Syn. Pleswsaurus eurymerus, Phillips 2 . 



Considerably smaller than the preceding. Number of cervical 

 vertebrae unknown. Humerus (fig. 66) relatively short, with the 

 distal expansion as much marked on the preaxial as on the post- 

 axial border, and articulating distally only with the radius and 

 ulna, of which the former is elongated, with an oblique superior 

 border and a narrow distal extremity, while the latter is very short 

 and much elongated transversely. 



This species was founded upon a pectoral limb from the Oxford 

 Clay of Bedford, of which a cast is figured on p. 315 of Phillips's 



Fig. 66. 



Cimoliosaurus eurymerus. — Ventral aspect of the right pectoral limb ; from the 

 Oxford Clay of Peterborough. About ,V h, humerus ; tr % trochanter of 

 do. ; r, radius; u, ulna; i, intermedium ; r', radiale ; u\ ulnare. 



'Geology of Oxford' as a pelvic limb. In that specimen, which 

 appears to have been somewhat restored, the proximal extre- 

 mity of the humerus is imperfect, and the contour of. the radius 

 and ulna is somewhat different from that of the correspond- 

 ing bones of the pectoral limb represented in fig. 66. This, how- 



1 Geology of Oxford, p. 315 (1871). — Plesiosaun/s. 



2 Loc. cit. 



