108 CEOCODILIA. 



vertical, long and slightly curved, ^ in number ; preorbital vacuity 

 large, and approximated to orbit. 



14792. The anterior portion of the skeleton ; from the Upper Lias 

 (Fig.) of Whitby, Yorkshire. Figured by Owen in his ' British 

 Fossil Eeptiles ' — Crocodilia, pi. xv. fig. 1, under the name 

 of Teleosaurus chapmani, and referred to the present 

 species by Deslongchamps in ' Le Jura Normand,' pt. iv. 

 p. 11. The tail of another Teleosaurian has been affixed 

 to the specimen, and represented in the figure. 



Purchased. About 1840. 



15500. The greater part of the skeleton, the skull being entire; 

 from Whitby. Purchased. About 1840. 



E. 757. The nearly entire cranium ; from Whitby. No history. 



R. 4. The cranium, wanting the rostrum ; from Whitby. 



Purchased, 1880. 



11589. Cast of a crushed cranium, without the rostrum. The 

 original was obtained from Whitby. 



Mantell Collection. Purchased, 1838. 



Genus STENEOSAURUS, E. Geoffrey \ 

 Including Mystriosaurus, Ka,xvp 2 =Macrospondylus, Meyer 3 . 

 Eostrum more or less elongated and narrow, with the teeth nu- 

 merous, generally stout and directed somewhat obliquely outwards, 

 grooved, and with vertical earinae ; premaxillae obliquely truncated 

 anteriorly, with a marked deflection of the extremity, which is more 

 or less expanded ; orbits regular, and directed more or less com- 

 pletely frontally ; supratemporal fossae usually very large and an- 

 gulated : postorbital bar directed more or less nearly at right angles 

 to the longer axis of the cranium, so that the posterior border of the 

 orbit is placed well in advance of the adjacent border of the supratem- 

 poral fossa ; infraorbital bar deep ; upper temporal arcade not sculp- 

 tured ; posterior nares broad, ovate or rounded, and placed in advance 

 of temporal fossae ; palato-pterygoid vacuities large. 



The writer follows the original view of Deslongchamps i of regard- 

 ing Mystriosaurus as not generically separable from Steneosaurus. 



1 Mem. du Museum, vol. xii. p. 146 (1825). Eegarding the application of 

 the term, see page 91, note 2. 



2 In Bronn's ' Lethsea,' 1st ed. vol. i. (1835). — (Page 525 in 2nd ed.) 



3 Nova Acta Ac. Caes. Leop.-Car., vol. xv. pt. 2, p. 196 (1831). 



* Notes Paleontologiques, p. 128. Subsequently this writer considered the 

 two as distinct. 



