Vol. 5] Merriam. — John Day Carnivora. 



2.1 



one might suspect from the character of the specimen described 

 above that they are broader than in M. coryphaeus. The heel of 

 M 2 in Philotrox condoni is broader than in M. coryphaeus, but 

 does not show a development of the entoconid and hypoconid 

 comparable to that seen here. The form of M 2 in Oligobunis ap- 

 pears to be quite different from that in this specimen, and M., is 

 absent. M 2 is said to be trenchant in Enhydrocyon and is un- 

 known in Hyaenocyon. 



3 4 5 6 



Fig. 3. Mesocyon ooryphaews Cope. Inner side of right Mj. No. 599. 

 Upper portion of John Day Series, Haystack Valley, John Day River, 

 Oregon. X 1. 



Fig. 4. Indeterminate. Superior aspect of left M 2 and M 3 . No. 672. 

 Middle John Day, below Clarno's Ferry, John Day River, Oregon. 



x iy 2 . 



Fig. 5. Indeterminate. Superior aspect of right M t . No. 1516. Upper 



John Day, Turtle Cove, John Day Valley, Oregon. X 1. 

 Fig. 6. Outer side of Mj shown in fig. 5. X 1. 



Another peculiar specimen (No. 1516), text-figures 5 and 6, 

 representing a portion of an inferior sectorial with a well-pre- 

 served heel, was found in the Upper John Day beds at the lower 

 end of Turtle Cove. It shows a hypoconid and an entoconid of 

 almost exactly equal size. It is distinguished from the sectorial 

 of the jaw tentatively referred to M. josephi by the presence of 

 a distinctly marked basal band on the outer side of the talonid. 

 This tooth differs from all of the John Day eanids with which I 

 am acquainted. It may represent a Mesocyon or possibly one of 

 the short- jawed forms. 



TEMNOCYON AETIGENIS Cope. 

 PI. 3, Fig. 2, and Text-figures 7, 8, 9, 10, and 11. 

 Temnocyon altigenis Cope, Palaeont. Bull. No. 30, p. 6, 1878 ; Rep. U. S. 

 Geol. Surv. Terts., Vol. 3, p. 903, PI 68, Fig. 9, 9a, 9b, PI. 70, Fig. 11. 



This species, constituting' the type of the genus Temnocyon, 

 has been only partially known, and was considered by Cope as 



