NOTES ON THE CANIDiE OF THE WHITE RIVER OLIGOCENE. 361 



but the vertebrae are much larger and the tail is longer and stouter. The, tubercular 

 molars of both jaws are relatively larger than in the other species. The inferior sectorial 

 has a low anterior blade, and the internal cusp of its talon is reduced in size. The hori- 

 zontal ramus of the mandible is long and slender and has a nearly straight inferior bor- 

 der. White River. 



DAPHiENUS HARTSHORNIANUS Cope. 



Daphcenus vetus Lsidy, Amphicyon vetus Leidy, in part, he. cit. Cards hartshor- 

 nianm Cope, Synopsis New Vert, from Colorado, 1873, p. 9. Ann. Rept. U. S. 

 Geolog. Surv. Terrs., 1873, p. 505. Amphicyon hartshomianus Cope, Tertiary 

 Vertebrata, p. 896. 



This species is somewhat smaller, and the tubercular molars of both jaws are propor- 

 tionately smaller than in the preceding species ; the anterior triangle of the lower secto- 

 rial is high and acute, and its talon is basin-shaped, with the internal cusp as large as 

 the external. The horizontal ramus of the mandible is straight and slender. Both this 

 species and the preceding one have been found iu the middle division (Oreodon beds) of 

 the White River formation, but not as yet, to my knowledge, in the lower (Titanothe- 

 riam beds) or the uppermost division (Protoceras beds). 



DAPHiENUS CUSPIGERUS Cope. 



Canis euspiyerus Cope, Proc. Amer. Phil. Soe., 1878, p. 70. Amphicyon entoptychi 

 Cope, ibid., 1879, p. 372. Amphicyon empigerm Cope, Bull. U. S. Geolog. Surv. 

 Terrs., Vol. vi, p. 178 ; Tertiary Vertebrata, p. 898. 



D. euspiyerus is much the smallest known species of the genus. The sagittal crest 

 is very short and inconspicuous ; the cranium is fuller and more rounded, the postorbital 

 constriction is shallower and more anterior in position than in the White River species, 

 and the mandibular ramus is nearly straight and very slender. The inferior sectorial is 

 very robust and has a low anterior triangle and basin-shaped heel. John Day stage. 



Daph,enus felinus, sp. nov. 



The inferior dental series of this species slightly exceeds in length that of D. vetus 

 and the sectorial is larger. The lower tubercular molars are inserted in the border of 

 the ascending ramus of the mandible, and, judging from the alveoli, were reduced in size. 

 The horizontal ramus is not much longer, but much heavier than in D. vetus, and has a 

 more sinuous ventral border, which rises more beneath the masseteric fossa. The limb 



