/ -± CROCODILIA. 



Some of the folloiving smaller specimens may belong to 

 immature individuals of this species. 



R. 777. A somewhat imperfect middle dorsal vertebra. 



R. 777 a. A late dorsal or lumbar vertebra. 



R. 777 b. A vertebra from the same region. 



R. 777 C. Another vertebra from the same region. 



R. 777 d. A third specimen from the same region. 



Serial Position Uncertain. 



Genus PRISTICHAMPSA, Gervais 1 . 



Known only by the teeth, which are remarkable for their extreme 

 compression and sharp cutting-edges. 



Pristichampsa rollinati (Gray 2 ). 



Syn. Crocodilus rollinati, Gray 3 . 



This is the type and only known species, and is of small size. 

 Hab. Europe (France). 



26657. The crowns of two teeth; from the Middle Eocene of 

 Argenton (Indre), France. 



Pomel Collection. Purchased, 1851. 



Genus HETEROSUCHUS, Seeley 4 . 



This genus is founded on the first of the following specimens, and 

 is only provisionally included in the present series. The centra of 

 the vertebrae are laterally compressed, and the neuro-central suture 

 is obliterated ; while other features are stated to suggest Dinosaurian 

 affinities. The genus may possibly prove identical with Hylaio- 

 champsa (infra, p. 76). 



Heterosuchus valdensis, Seeley 5 . 

 Hab. Europe (England). 



1 Comptes Rendus, vol. xxxvi. p. 376 (1853).- Amended from Pristichampms. 



2 Synopsis Reptilium, p. 61 (1831). — Crocodilus. 

 ' Loc. cit. 



1 Quart. Journ. Geol. Soc. vol. xliii. p. 212 (1887). 5 Loc. cit. 



