19 i MAEINE EEPTILES OP THE OXFORD CLAf. 



humerus show that the animal was advanced in age ; the differences, however, do not 

 seem to be sufficiently great to warrant separation as a distinct species. 

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



„ , , Anterior Posterior Peo- First c„„,„i„ Anterior Middle Posterior 



"> ^'■■^^'^^■^ cervioiils. cervicals. toral. dorsal. =«^"'^'^- caudiJ. caudal, candal. 



Length of centrum in mid- tig''. fi^''. 



ventral line 2-4 2-8 3-1 3-5 3-8 3-8 . . 4-8 4-1 4-7 3-9 3'6 3-5 3-1 3-0 2-S 



"Width of posterior face of 



centrum 3-3 3-8 4-2 4-6 o"? 6-3 7-5 7'1 7-0 7-0 6-9 7-4 7-4 5--6 4-7 



Height of posterior face of 



centrum 2-5 2-9 3-3 3-5 4-2 4-7 5-7 5-8 oo 5-5 4-9 5-2 5-4 4-5 37 3-1 



Height to top of neural 



spine 9-1 11-2 12-7 



Distance betv\-een the outer ends of the sacral ribs 21'2 cm. 



Shoulder-girdle (approximate only) : 



Scapula : greatest length 27 '2 



length of median border 19-0 



Coracoid ; length from middle of glenoid cavity to tip of 



postero-external process 35-4 



width of the united bones at the hinder angle of the 



glenoid cavity 38-8 



width of the combined bones at narrowest .... 30"3 



Humerus : length 36-2 



width of head . '. 9-0 



„ upper end with tuberosity 12-Q 



„ shaft at narrowest 7-8 



,, distal expansion 27"0 



Eadius : length of preaxial border 14-5 



„ humeral border 15-3 



„ ulnar border (approx.) 4-5 



Ulna : length 6-.5 



width 14-4 



Pelvis : 



Ilium : length 19-0 



width of upper end (approx.) 4-9 



„ lower eud (crushed) .... (approx.) 7'6 

 Pubis : width from anterior angle of acetabulum to 



symphysis 26-7 



width of articular head 12-5 



Ischium : width from acetabular surface to symphysis . . . 24-3 



width of neck . 7-0 



Femur: length 33-7 



greatest width of head 9-7 



width of upper end with trochanter . . (approx.) 10-8 



„ shaft at narrowest 7'0 



„ distal expansion 20-7 



