CETPTOCLEIDtrS OXONIENSIS. 199 



vertebrae are not yet united to the arches and caudal ribs, and in some cases are 

 curiously compressed from above downwards, so as to be much wider in proportion to 

 their height than usual : this may be in part the result of crushing, but probably also is 

 characteristic in some degree of the very young centra of the posterior dorsals and 

 caudals. 



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



Coracoid : greatest length 13'0 



^^idth at posterior angle of glenoid cavity . . . . 9-3 



Scapula : greatest length 9'7 



length in straight line from median angle to tip o£ 



dorsal ramus 10'5 



width of articular head 4'5 



? Humerus : length 16'3 



width of shaft 4-0 



„ distal end 8'8 



Ilium : length 9'1 



width of upper end (approx.) 2"4 



„ shaft 1-7 



„ lower end 2'5 



Ischium : width from acetabular surface to symphysis . . . 9'7 



,, of neck 3'0 



„ of median expansion 8'3 



„ of articular head 4'0 



? Femur: length 16-0 



width of shaft 4-3 



„ distal end 8'9 



E. 2420 (Leeds Coll. 43). Small set of bones belonging to an individual in which ossification was 

 far advanced. The parts preserved are three anterior dorsal vertebrae, two middle 

 caudal centra, left humerus, left femur, some odd paddle-bones, and portions of ribs. 

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



Vertebi'a; Anterior dorsals. 



Length of centrum in mid-ventral line . . . 3'8 4*2 4-1 

 Width of posterior face of centrum .... G-4 6-3 6-3 

 Height of posterior face of centrum .... 5'3 o-5 5-6 



Humerus : length 33'2 



diameter of head 8-7 



greatest width of upper end with tuberosity . . . 13'0 



width of shaft 7-9 



„ distal expansion 24-5 



Femur : length 30-2 



diameter of head 89 



greatest width of head with trochanter lO'o 



width of shaft 6-7 



„ distal expansion 17"8 



