from the Cretaceous Beds of Brazil. 443 



usually are. The sides of the crown are covered with fine, in- 

 terru{)ted, undulating; striae, which a})pcar to be different from 

 the dental sculpture of the Crocodilia hitherto described. These 

 strij\3 are most distinct near the middle of the tooth, becoming 

 much more delicate at the base, and nearly obliterated at the 

 apex. 



In size and general appearance this specimen resembles 

 somewhat the teeth of Crocodilus anttquusj Leidy, from the 

 Miocene of Virginia, but differs from that species in being less 

 tapering, and in the ridge on the edges extending further 

 downward. It resembles still more closely the teeth of a new 

 species of crocodile discovered by the writer at Squankum, 

 N. J., in the tertiary greensand, which will soon be more 

 fully described under the name Theocamjjsa squanhensis^ 

 Marsh. Botli species have essentially the same proportions, 

 and similar dental striaj ; but the cutting-ridge of the New-Jer- 

 sey specimens is more prominent, and extends nearly or quite 

 to the base of the crown. The two species were apparently 

 about the same size, both being considerably larger than exist- 

 ing crocodilians. 



Other ])arts of the skeleton of the Brazilian species would 

 perhaps show generic characters to distinguish it from the 

 modern procoelian crocodiles ; but in the absence of these, it 

 may for the present be placed in the same genus. Its form, 

 cutting-edges, and especially its peculiar striae, readily distin- 

 guish it from any species with Avhich it is liable to be con- 

 founded ; and it may a[)propriately be named Crocodilus Hartti, 

 in honour of its discoverer, whose recent researches have thrown 

 so much light on the geology of Brazil. 



Several specimens of reptilian teeth collected by Mr. Allport 

 in the same deposit at Montserrate, a locality about two miles 

 south-west of Plantaforma station, evidently belong to this 

 species, as the illustrations accompanying his paper (pi. xvi. 

 figs. 1, 2, 3, and 5) clearly indicate. The explanation of the 

 plate refers to the specimens as " Teeth of Crocodile with deli- 

 cately wrinkled surface ; " but no further dcscri})tion is given. 



In the same paper Mr, All])ort has given figures of several 

 crocodilian teeth from the localities at Plantafomia and Mont- 

 serrate, which are quite different from those above described. 

 These are represented in pi. xv. fig. 5, and pi, xvi, figs. 4, 6, 

 7, and 8, and are referred to on p. 261 as " Teeth of Crocodile 

 with strong continuous striw, and coarse riblets." These 

 specimens, taken in connexion with some imperfect remains 

 in the collection made by Prof. Ilartt, indicate the existence 

 in this dejiosit of a second, and smaller, species of crocodile, 

 probably allied to the modern ga vials. The teeth are not so 



