. Bulletin of the Department of Geology. Geology. Vol. 6] Merriam: Virgin Valley and Thousand Creek. 237 M2 is relatively large, and an extraordinarily developed tooth. Its fore and aft diameter equals almost three-fourths that of the carnassial, and there is a well - developed paraconid present. The protoconid and the meta- eonid are nearly equal in size. The paraconid may nearly equal the other cones in size. On the large basin-shaped heel the nearly equally developed hypoconid and entoconid are connected posteriorly by a low marginal ridge. On the antero-external side of the base of the tri
. Bulletin of the Department of Geology. Geology. Vol. 6] Merriam: Virgin Valley and Thousand Creek. 237 M2 is relatively large, and an extraordinarily developed tooth. Its fore and aft diameter equals almost three-fourths that of the carnassial, and there is a well - developed paraconid present. The protoconid and the meta- eonid are nearly equal in size. The paraconid may nearly equal the other cones in size. On the large basin-shaped heel the nearly equally developed hypoconid and entoconid are connected posteriorly by a low marginal ridge. On the antero-external side of the base of the trigonid a prominent ridge is de- veloped on the cingulum. On the specimens available a minute tubercle is present in the valley between the protoconid and hypoconid. M3 is not represented on any of the specimens. Judging from the form and size of the alveolus, this tooth was relatively large, and its anteroposterior diameter was considerably greater than the transverse. Measurements. Type specimen, no. 11562 Length of mandible from anterior side of Px to posterior side of condyle mm. Height of mandible below protocone of Mj 21. Greatest thickness of mandible below talonid of M2 9. P2, anteroposterior diameter 6. Pa, anteroposterior diameter P4, anteroposterior diameter Mj, anteroposterior diameter 15. M,, anteroposterior diameter of heel 4. M,, transverse diameter of heel 7. M2, anteroposterior diameter M2, greatest transverse diameter 5a Figs. 5a and 5b. Tepluocyon Icelloggi, n. sp. M2, unworn tooth. No. 10651, X iy2. Virgin Valley Beds, Virgin Valley, Nevada. Fig. 5a, outer side; fig. 56, superior side. Fig. 6. Tephrocyon Icelloggi, n. sp. M2, worn tooth. No. 11474, X 1%. Vir- gin Valley Beds, Virgin Valley, Nevada. Fig. 7. Tephroeyon, near Tcelloggi, n. sp. No. 12542, X 1%. Thousand Creek Beds, Thousand Creek, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colora
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