148 



MAElJSrE EEPTILES OE THE OXFOED CLAT. 



towards their outer extremities they converge and were in contaot or separated only 

 by pads of cartilage ; probably three or four sacrals were present. It is not clear what 

 the relationship of the outer ends of the sacral rib was to the ilia, but probably 

 there was no actual contact and the connection was only by ligament. 



Text-fig. 71. 



s.r 



n:sp. 



Sacral rertebrae and ribs of Picrodeidus sp., from above, f nat. size (E. 2739). 

 n.sp., neural spine ; p.z., posterior zygapophysis ; r.f., facets for sacral ribs ; s.r., sacral i-ib 



The pubes and ischia are very completely ossified, and their median symphysial 

 borders are continuous, the obturator foramina being completely surrounded by bone : 

 the blade of the ischium is rather narrower and more elonsrateJ tliaii in Munenosaiiriis. 



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



Basioccipital : length (approx.) 2-9 



width at lateral processes 3-7 



transverse diameter of occipital condyle. 



Vertebrae Anterior cervicals. 



Lengtli of centrum in mid- ,- ■ — ^ 



venti-al line 2-5 2-9 3-2 



Width of posterior face of 



centrum 31 3-4 3-7 



Height of posterior face of 



centrum 2-3 2-6 2-8 



Height to top of neural spine 5-6 . . 7-9 



Middle 

 cervical. 



4-0 

 4-3 



Posterior 



4-0 



1-9 



Sacrals. 



^ 



3-3 



51 



4-8 



3"o(app.) 4-1 

 9-5(,app.) 13-2 (app.) 



3-4 



3-4 



4-9 



3-5 



Length of the sacral ribs (text-fig. 71) 5-7 



Ischium : length of expanded portion 17'5 



width of neck 4-4 



„ articular head C'8 



Anterior 

 ca\idal. 



2-9 



4-9 



3-5 



