184 MAEINE REPTILES OF THE OXFORD CLAY. 



Scapula : length 7 - 9 



width of upper end 1"9 



shaft 1-0 



„ articular end 2 - 8 



Humerus : length 8-3 



width of head 2-0 



„ at deltoid crest 2-8 



„ of distal articulation 1*8 



Pelvis : 



Ilium: length of dorsal border 5-2 



„ acetabular border 5 - 5 



Ischium: length of symphysial border 11*9 



width from articular end to the posterior angle . 11*4 



greatest width at proximal end 4*5 



Pubis : greatest length 9 - 8 



width of lower expansion 5 # 7 



„ upper end 2-4 



Hind limb : 



Femur: length in straight line 26-4 



greatest width at proximal end 4*0 



long diameter of the middle of the shaft .... 2*7 



Tibia : length 9-4 



Fibula: length 9-0 



First metatarsal : length 8-3 



width of upper end 25 



E, 2033 (Leeds Coll. 32). Portions o£ skull and mandible, teeth (PI. IX. fig. 2), atlas, axis, and 

 five other cervical vertebrae, seventeen dorsals, two sacrals, and twenty-nine caudals, 

 ribs, ilia, ischia, pubis, femora, one tibia and fibula, two metatarsals. 



The skull is very fragmentary, but the frontals show the sculpture characteristic of 

 this species. This specimen is interesting from the fact that the right ilium and 

 ischium and the upper end of the femur are greatly deformed by the development 

 of extensive exostoses. The ilium and ischium are closely fused, and the greatly 

 thickened upper end of the femur bears a rough concave surface. Possibly these 

 deformities are the result of some severe injury received by the animal. 

 The dimensions (in centimetres) of this specimen are : — 



Vertebrae Axis. 



Length of centrum in mid- 

 ventral line 3-6 



Width of posterior face of 

 centrum 2-8 



Height of posterior face of 

 centrum 3-3 



Height to top of neural spine. 



Last 



;rvical. 



Middle 

 dorsal. 



First 

 sacral. 



Caudal at 

 bend of tail 



3-5 



4-3 



3-4 



2-2 



3-8 



3-5 



3-5 



2-1 



3-8 



3-7 



3-2 



2-9 



8-8 



„ , 



( . 



7-4 



