544 THE WASATCH FAUNA. 



BATHMODON Cope. 



Proceed. Amer. Philos. Soc, 1872, p. 417, Feb. 16, 1872. Annual Report U. S. Geol. Surv. Terrs., F. V. 

 Hayden, 1872, p. 586 (1873). Systematic Catalogue Vertebrata Eocene New Mexico, 1875, p. 24. 

 American Naturalist, 1882, January, p. 73. Paleontological Bulletin No. 34, p. 165, Feb., 1882. 



This genus reposes as yet on the structure of the posterior foot, which 

 is however not completely known. The astragalus is less transversely ex- 

 tended than in Coryphodon, and the internal apex is recurved, and cames 

 on its interior extremity an articular facet not found in that genus. It 

 looks inwards, and stands below the middle of the inner side of the tibial 

 face of the bone. It is not certain what element articulates with this facet. 

 It may be a proximal extension of the proximal extremity of the entocunei- 

 form. This is questionable in view of the square truncation of the facet 

 and its entirely inward presentation. It may be a supernumerary bone 

 forming a spur. 



So far as known the other characters of the genus are as in Corypho- 

 don. The skull has not been found. Some bones found with the type 

 specimen of B. radians have the following characters: 



Some anterior sternal segments are cylindric; in one, the articulations 

 for the haemapophysis project laterally, giving the piece a T-shaped form. 

 The atlas has a flat diaparapophysis, presenting its edges fore and aft; the 

 arterial canal traverses it obliquely. The coracoid is double, having a 

 tuberosity on the edge of the glenoid cavity, and a prominent hook just 

 outside of it. The lumbar vertebrae are quite short. The cuneiform bone 

 is narrow pyriform, with two triangular facets on one side, the smaller 

 being sublateral, and one twisted over the other. The ungual phalanges 

 are very short, somewhat flattened, and with the terminal portion transverse 

 and rugose as in some toes of Elephas. 



Bathmodon radians Cope. 



Proceed. Amer. Philos. Soc, 1872, Feb. 16, pp. 417, 418. Hayden's Geol. Surv. of Montana, 1871, p. 350. 

 Annual Report U. S. Geol. Surv. Terrs., 1872 (1873), p. 587. Coryphodon radians Cope, Report U. 

 S. Geol. and Geog. Expl. Surv. W. 100th Meridian, G. M. Wheeler, iv, part II, p. 206. t Bath- 

 modon aemicinctus Cope, I. c, p. 418. U. S. Geol. Surv. Terrs., 1872, 1873, 588. 



Plates XLV, XL VI, XLVU, XL VIII; figs. 1-6. 



The original specimens on which this species was recorded, were 

 obtained by Dr. Hayden near Evanston, Wyoming. They include parts 



