CROCODILIA. 157 



Crocodilus sulciferus Cope. 



Proceed. Aiuer. Philos. Soc, 1872, p. 555 (October 12). Annual Report, loe. cit., 612. 



Plate XXIV, fig. 23. 



The specimen on which this species was established included various 

 portions of the skull and skeleton, which were of about the size of corre- 

 sponding parts of the C. elliottii. The characteristic teeth were removed for 

 purposes of description and illustration, and it has unfoi'tunately become 

 impossible to identify the specimens with which they were originally asso- 

 ciated. I can therefore at present only reproduce the description originally 

 published. 



A medium-sized species with cranium deeply and roughly pitted. The 

 chief character is at present visible in the teeth. The larger of these are of 

 subcylindric and short conic crown, which is supei-ficially grooved from, 

 basis to near apex; sulci coarse, open, but close together, and separated by 

 strong narrow ridges. 



From the Bridger bluffs of Upper Green River. 



Crocodilus clavis Cope. 



Proceed. Amer. Philos. Soc, 1872, p. 48."i. Paleontological Bulletin No. 6, p. 3 (August 20). 

 Plate XXI, fig.s. 4-9; Plate XXII. 



This large species is represented primarily by a portion of a cranium 

 with vertebrae, of a specimen which I found in the Maumioth Buttes of the 

 Washakie basin, near South Bitter Creek, Wyoming. A portion of this 

 specimen has been, through the vicissitudes of a moving, mislaid; but enough 

 remains to furnish determinative characters. Some time subsequently I 

 obtained from the same region a nearly complete skull, accompanied by 

 various parts of the skeleton, which I refer to the same species. I now 

 give the original description of the type The muzzle of this species is of 

 narrowed proportions, and sufficient depth to give it a broad, oval section. 

 The nasal bones appear to have reached the nareal orifice. The anterior 

 superior teeth are very large, especially the canine. The inferior tooth 

 corresponding is large, and occupies an emargination which approaches 

 near to the nasal suture. The pitting of the muzzle is fine, and the swollen 



