24 MAELNE EEPTILES OE THE OXFORD CLAY. 



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

 Mandible : width across sympliysial region at narrowest 



point 13-4 



Teeth : 



Length along curve 21-0 20-7 8-0 



Height of crown 7-5 7-9 2-9 



Diameter of base of crown .... 2-7 2 - 7 1'4 



Greatest diameter of root 3 - 2 3 - 2 L7 



Cervicals. Caudals. 



, ' 1 , " v 



Vertebra a*, b. c. d. e. 



Length in mid-ventral line .... 4*5 4'2 4*5 5'1 4-3 



Height of articular surface of centrum. 9 - 2 9-0 9-7 9 - l 6-1 



Width of articular surface of centrum. 10-3 10-0 10-2 9-9 6-S 



Neural arch of cervical vertebra : height from base of pedicle 



to top of neural spine . . 16 app. 

 height from top of arch to 



top of neural spiue . . . 10-3 



Radius : length (outer side) ll - 7 



width, greatest ll'l 



Ulna : length 10-2 



width 11-6 



Eemur (crushed) : 



length 60-9 



width of upper end ? 



„ middle shaft 14 - 1 



„ lower end 25 - 3 



Tibia: length 15-4 



width 13-9 



Eibula: length 14-1 



greatest width 13L 



Intermedium : greatest length 8-7 



„ width 8-5 



K. 2447 (Leeds Coll. 11). Nearly complete mandible ; there were about twenty-eight teeth on 

 each side, seven of which were situated in the symphysial region, but all have been 

 lost and are represented only by their alveoli. Figured on PL II. figs. 1, 1 a. 

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



Extreme length from posterior angle to tip of symphysis . . 109 - 



Length of symphysis (appros.) 23"0 



Greatest width across symphysial region ll - 



Width of postsymphysial constriction 10-2 



Depth of coronoid process (approx.) 9 - 7 



Width of articular surface 10-3 



Length of postarticular process (appros.) 7*4 



Width between outer angles of the postarticular processes. 31*3 



* Figured by Lydekker, loc. cit. 



