198 MAEINE EEPTILES OF THE OXFOED CLAY. 



vertebrse, two pectorals, fourteen dorsals, and three caudals ; a few of the neural 

 arches and cervical ribs, in all cases free from the centra ; the scapulae and coracoids 

 (figured in Ann. Mag. Nat. Hist. [6] vol. xv. (1895) p. 341, fig. 3, B, with the clavicle 

 restored, see also text-fig. 89, A), humeri, radii, ulnse (text-fig. 90, B), pubes, ischia, 

 and left femur. 



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



Vertebrae 



Anterior 

 oervinaip. 





Middle 

 cerTicals. 



2-4 2-6 



Posterior 

 cervicals. 



2-7 



Pectoral. 

 32 



Dorsals. 



3-4 3-3 



Caudal. 



Length in mid-ventral line. 



1-8 



1-9 



2-3 



2-4 



Width of posterior face of 



















centrum 



2-5 



2-8 



3-3 



3-7 4-3 



4-7 



4-S 



4-9 4-9 



4-5 



Height of posterior face of 



















centrum 



1-9 



2-1 



2-7 



2-9 3'3 



3-5 



3-9 



4-4 4-5 



3-3 



Shoulder-girdle (test-fig. 89, A): 



Scapula : greatest length 15'9 



width of articular head 6-7 



„ neck 4'3 



length in a straight line from the median angle to 



tip of dorsal ramus 16-5 



Coracoid : length (from anterior internal angle to postero- 

 external process) 26'4 



width of each at level of posterior angle of the 



glenoid cimtj 14-4 



width (at narrowest) 11-0 



Humerus (text-fig. 90 B) : length 22-5 



greatest width of upper end "■9 



width of shaft (at narrowest) 6-0 



,, distal end 14-1 



Eadius (text-fig. 90, B) : length of preaxial border .... S-3 



length of humeral border (approx.) 7'7 



Ulna (text-fig. 90, B) : length 5-0 



width 6-5 



Pelvis : 



Pubis: greatest length 16-3 



width 20-2 



Ischium : width of articular head 6-5 



„ neck 4'7 



„ from acetabular to symphysial surface . . 13-2 



„ of median expansion . . 12'5 



E. 2431 (Leeds Coll. 38). Portions of the skeleton of a very young individual. The portions 

 preserved include part of the parietals, centra of thirty-five dorsal and caudal 

 vertebrae with a few detached arches, coracoids, right scapula, some bones of the fore 

 paddles (including the characteristic radii), ilium, ischium, portions of pubes, femur. 

 The ossification is very imperfect, the distal end of the humerus being no more expanded 

 than that of the femur, from which it is distinguished with difiiculty ; the centra of the 



