. Bulletin of the Department of Geology. Geology. Vol. 5] Merriam.—John Day Carnivora. one might suspect from the character of the specimen described above that they are broader than in M. coryphaeus. The heel of M2 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 M2 in Oligobunis ap- pears to be quite different from that in this specimen, and M., is absent. M2 is said to be trenchant in Enhydrocyon and is un- known in 3 4 5 6 Fig. 3. Mesocyon ooryphaews Cope. Inner s
. Bulletin of the Department of Geology. Geology. Vol. 5] Merriam.—John Day Carnivora. one might suspect from the character of the specimen described above that they are broader than in M. coryphaeus. The heel of M2 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 M2 in Oligobunis ap- pears to be quite different from that in this specimen, and M., is absent. M2 is said to be trenchant in Enhydrocyon and is un- known in 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 M2 and M3. No. 672. Middle John Day, below Clarno's Ferry, John Day River, Oregon. x iy2. Fig. 5. Indeterminate. Superior aspect of right Mt. 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. Please note that these images are extracte
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