CANID^. 935 



Measurements of lower jaic. 



Length to end of first tubercular 033 



Length of premolar series 017 



Length of sectorial 008 



Width of sectorial posteriorly 0036 



Length of first tubercular 0047 



Width of first tubercular 0030 



Depth of ramus at sectorial 0080 



Depth of ramus at first premolar 0050 



The enamel of the inferior molars is strongly wrinkled. The man- 

 dibular ramus I originally ascribed to this species belongs to the G. latidens, 

 as proven by another jaw which was found with the skull of that species. 



The specimens Nos. 1, 2, and 5, described as typical of this species, 

 was discovered in the John Day River Beds of Oregon, by J. L. Wortman; 

 specimen No. 3 was found by Mr. Sternberg, at the same locality. 



ENHYDROCYON Cope. 



Bulletin U. S. Geological Survey, V, 1879, p. 56; American Naturalist, 1879, 131, 1883, p. 245. 



1 3 2 



Dental formula : I. ? ; C. - ; Pm. - ; M. -^. The superior premolars 



1 Of 



consist of two ordinary and one sectorial; the first and second are both 

 compressed, two-rooted, and in the typical species with median lobe of pos- 

 terior cutting edge. The two true molars are transverse and tubercular. 

 The three inferior premolars are all two-rooted, and with posterior lobe, in 

 the known species. The heel of the sectorial Is cutting, as in Temnoci/on, 

 and the internal tubercle is present. There is at least one inferior tubercular 

 tooth ; specimens are injured so as not to display a second. 



The dentition of this genus refers it to the Canidce, but the form of the 

 skull resembles that of Putorius and Lutra. Unfortunately no other part 

 of the skeleton of this genus is known. 



Enhydrocyon stenocephalus Cope. 



Bulletin loc. sup. cit., 1879 (Feb. 28), p. 56. 

 Plate LXLX; figs. 3-5. 



In a nearly complete cranium belonging to this species we observe the 

 shortness of the facial part of the skull as compared with the length of the 

 cerebral, and also the constriction of the skull behind the orbits. The 



