216 TEETIAET VEETEBEATA OF THE FAY^M. 



C. 10054. Imperfect skull, wanting the zygomatic arches and much of the base and left side of the 

 cranium. The teeth are badly preserved or represented by the alveoli only ; the dental 

 formula is i. 2 or 3, c. 1, pm. 4, m. 4. Type specimen described and figured in Geol. Mag. 

 loc. cit. supra, also figured on PI. XX. figs. 1, 1 A, 1 B. This specimen forms the basis 

 for the description of the skull given above. Its principal dimensions (in centimetres) 

 are : — 



Extreme length 30 



Width between outer angles of occipital condyles .... 7'5 



Grreatest width of occipital surface 13 app. 



Width oi foramen magnum 3'4 



Height of occipital surface above foramen magnum .... 6'5 



Width of skull-roof at lambdoidal ridge 6 9 app. 



„ „ narrowest point, opposite the middle 



of the temporal fossae 4-4 



Width between ends of supraorbital processes 8-8 



„ of snout in front of external nares 4'7 



Length of narial opening 6'7 



Width of narial opening 3-3 



Length of dental series from canine to last molar .... 11'4 

 „ four molars 55 



Owing to the somewhat crushed condition of the specimen, some of the above 

 measurements are only approximate. 



Jf. 8581. Plaster cast of the above specimen. Made in the British Museum. 



M. 8581a. Plaster cast of the brain-case of the above specimen (text-fig. 65). 



Made in the British Museum. 



C. 10190. Anterior portion of skull of a larger individual than C. 10054. This specimen is 

 associated with the cervical, dorsal, and caudal vertebras described above (PI. XX. 

 figs. 4-6), and with the right os innominatum (text-fig. 68, B). The dimensions (in 

 centimetres) of the vertebrae are : — 



Anterior (?) Anterior Anterior 



cervical. lumbar Sacral caudal Caudal, 



(fig. 4). (flg. 6). (fig. 5). 



Width of centrum 3-8 5-1 5-6 6-2 5-8 



Height of centrum 2-3 4-5 4 5-3 4-2 



Length of centrum 1-8 4-2 4 3-7 4-1 



Width between ends of transverse processes . 12 13-|- 19 13-4 13-8 



Height to top of neural spine 8-5 -f- 8'7 8'5 8*2 



The dimensions (in centimetres) of the os innominatum (text-fig. 68, B) are : — 



Total length 17-7 



Length of ilium from centre of acetabulum 9*7 



„ pubis from centre of acetabulum 4*2 



„ ischium from centre of acetabulum 8'6 



Greatest width of ilium 2*6 



„ „ ischium 4'1 



