134 MAKITCE EEPTILES OF THE OXFOKD CLAY. 



The width between the outer ends of the ribs in the first sacral is 27 - 4 cm., in 

 the second 24'7 cm., and in the first caudal 25'0 cm. 



Scapula : length 16 - 7 



width of articular end 5'1 



middle of shaft 2-2 



,, upper end 5 - 



Ilium: length of dorsal border 16-1 



height from acetabular border to dorsal edge .... 11*3 



length from anteroinferior to postero-superior angle . 18-2 



Ischium: length of svmphysial border 20-2 



width from articular end to posterior angle . . . 20-1 



width of neck at narrowest 5*5 



greatest width of proximal end 8-8 



Femur : length in straight line 45-6 



width of upper end 7'9 



long diameter of middle of shaft 4 - 3 



short diameter of middle of shaft 3 - 5 



greatest width at condyles 5 - 6 



Tibia : approximate length 21-3 



width of upper end . , 6 - 



H.. 3169. Portions of. the skeleton of a large individual probably belonging to this species. The 

 parts preserved are tracheal rings, left coracoid, right scapula, radius, ulna, right ilium, 



pubis (PI. VII. fig. 8), femora, tibise, bones of hind foot, scutes. In this specimen a few 

 of the ossified tracheal rings are in a remarkably good state of preservation. 

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



Tracheal ring : long diameter 3 - 2 



short diameter 2-7 



greatest thickness 0*5 



Coracoid: greatest length 16-1 



width of shaft at narrowest 2-4 



length of the scapular border 4-0 



approximate width of lower end 8'5 



Scapula : greatest length 15"0 



width at upper end 5-5 



width of shaft at narrowest 2*3 



TJlna: length 11-9 



width of upper expansion (approx.) 5 - 5 



Ilium : length of dorsal border 12-2 



height from acetabular to dorsal border 9'8 



length from antero-inferior to postero-supericr border. 16 - 1 



Femur: length in straight line 41-7 



width of bead 6-4 



long diameter of middle of shaft 4-3 



