144 SAUEOPTEETGIA. 



31799. The left ischium; from Shotover. This specimen is repre- 

 (Fig.) sented in fig. 44, and was probably associated with No. 

 31803; it closely resembles the ischium of the opposite 

 side from the same locality, figured in Phillips's ' Geology 

 of Oxford,' p. 351. The diameter from the anterior ex- 

 tremity of the symphysis to the postero-external angle is 

 0,312 (12-3 inches). Purchased. About 1852. 



46468. A similar right ischium ; from Foxhangers. 



Cunnington Collection. 



46468 a. A slightly smaller right ischium ; from Foxhangers. 



Cunnington Collection. 



Pliosaurus, sp. — Ventral aspect of the pelvic girdle of an immature individual ; 

 from the Kimeridge Clay, pu, pubis ; is, ischium. About T V nat. size. 



46478. A left humerus or femur ; from Devizes. Length 0,422 (16*6 

 inches), diameter of distal extremity 0,145 (7'7 inches), 

 these dimensions being almost identical with those of the 

 type of the so-called P. simplex. Cunnington Collection. 



31788. A similar specimen, with the postaxial border imperfect dis- 

 tally ; from Shotover. Purchased. About 1852. 



47127. A somewhat smaller specimen of the right side, with both 

 borders imperfect distally ; from Ely. In its smooth tex- 

 ture this bone agrees very closely with the dorsal vertebra 

 No. 20280. Sharp Collection. 



