MUE.ENOSAUEUS DUEOBRIVENSIS. 



131 



tlie centra iu the cervical and dorsal regions, although the neuro-central sutures are still 

 open ; in the sacral and caudal regions the arches are lost in aU cases but one (text- 

 fig. 57). In the pectoral girdle the scapulae met in median symphysis, but did not 

 yet extend back in the middle line to meet the coracoids, the interval between them 

 being, however, only about 4 cm. The heads o£ the humeri and femora are showing 

 signs of becoming rounded owing to the extension of ossification into the originally 

 cartilaginous ends : in the type specimen they are nearly flat. The whole skeleton 

 shows very well the massiveness characteristic of this species. 

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



Skull too fragmentary to measure. 

 Mandible : width of articular surface . . 

 length of postarticular region 



2-6 



3-8 



Vertebra: Cervicals.. 



Length of centrum in mid-ventral line 

 Width of posterior face of centrum . 

 Height of posterior face of centrum . 

 Height to top of neural arch . . . 



Atlas and 

 axis, 



. 5-0 

 . 3-0 



. 2-6 



Third. 



3-1 



3-1 



2-7 



Fifth. EleTenth. Twentieth. 



Thirty- 

 fifth. 



3-3 

 3-5 



3-0 



4-3 



4-2 



3-7 



10-0 



5-2 5-3 



5-2 6-6 



4-8(app.) 5-7 



15-3 180 



4-3nd,43rd 

 (last true 

 cervical). 



5-1 



7-7 

 6-0 



Second 

 pectoral 

 (figured). 



Anterior 



dorsal 

 (figured). 



Pectorals and dorsals,"! n^'ctoral ^"^'^ "^dm-T ^"'«"0'" ^°^^- Post. (? last) Sacral Anterior""'"^'",* 



sacrals and oaudals J rfip-uredl doraal. ,fl„,,Jl')^^ dorsal. dorsal. dorsal, (figured). caudal.,/^"! 



Middle 



caudal 



(figured). 



Length of centrum in mid- 

 ventral line .5-6 5-7 5-6 5-9 5-6 5-4 



Width of posterior face of 



centrum . 7-8 7-6 6-9 7-6 6'9 6-5 



Height of posterior face of 

 centrum 6-3 6-2 5-9 6-5 6-0 5-8 



Height to top of neural arch ... . . 20-0 22-0 20-0 



Width between ends of trans- 

 verse processes . . 14'5 18-4 14'6 



4-7 

 6-7 

 5-1 



3-4 



6-3 



4-7 



2-9 



5-4 



4-1 

 8-3 



10-6(app.) ., 

 . . , 41-0 



Coracoid : greatest length 



width of united bones at hiuder angle of glenoid 



cavity 40-4 



width at narrowest of the two united bones (approx.) 28-4 



„ between angles of postero-external processes . 34-0 



Scapula ; greatest length 27*5 



length from anterior angle to posterior end of 



ventral ramus , 18-2 



length from end of median coracoid process to tip of 



dorsal ramus 27'5 



width of glenoid surface (above downwards) ... 6-1 



„ ,, „ (before backwards) . . . 6*5 



Interclavicle (PI. V. fig. 10) : greatest length 8-5 



length on mid-line 6'6 



width (so far as preserved) . . 9"8 



S2 



