METRIORHYNCHUS DUROBRIVENSE. 201 



R. 2618. A nearly complete skull (PI. XIII.) and mandible of a young individual, comparatively 

 little crushed and with many of the bones disarticulated ; the vomer (PI. XIII. fig. 4) 

 and other bones o£ the palate are well preserved. Also atlas and axis (wanting neural 

 arch o£ atlas), four other cervical vertebras, fourteen dorsals, two sacrals, and some 

 caudals, some ribs, right and part of left ilium, pubes, left and part of right femur. 

 tibia, fibula, odd bones of foot. 



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



Skull (PL XIII.) : 



length in raid-dorsal line 42 - 5 



„ to anterior angle of nasals 30'0 



,, of nasals 14 - 8 



distance between nasals and prernaxilloe 26 



least width between orbits 7'2 



width between outer angles of prefrontals 14-9 



length of the frontal anterior to temporal fossae . . . 8'0 



Vertebras Axis. 



Length in mid-ventral line. 2"6 

 Width of posterior face of 



centrum 2'2 



Height of posterior face of 



centrum 24 



Ilium : length of dorsal border 2 - 8 



,, acetabular border 3 - 9 



distance from antero-superior to postero-inferior angle 4'2 



Pubis : length 7*7 



width of distal expansion 3-9 



Femur : length in straight line 17'0 



greatest width of head 2-8 



long diameter of middle of shaft 1*7 



Tibia : length 73 



width of upper end 2*4 



„ lower end 1*6 



Middle 



Last 



Middle 



Second 



Middle 



cervical. 



cervical. 



dorsal. 



sacral. 



caudal. 



2-7 



32 



3-6 



32 



31 



2-5 



2-5 (app.) 



25 



24 



1-9 



2-6 





2-4 



2-4 



22 



l'AKT II. 



