220 



DINOCERATA. 



Uiiitatlieriuiu fissidens, Cope, sp. 



^V(loJcut.s: 19ti and 197, below. 



Figure 193. — Lower jaw of Uintatherium fissidens (aftrr Oope); top view. 

 Figure 107. — The same specimeu ; front view. 



Both figures are two-lhirJs natural sizp. 



The above fig-ures were made by a direct transfer from the original 

 ■^^■oodcuts cited below. 



Cope (Bathyopsis fissidens). — Bulletin of the TJ. S. Geological Survey of tlie 



Territories, Vol. VI, No. 1, pp. 194-106, February, 1881. 

 Proeeeilings of the American Philosophical Society, Vol. XX, pp. 176, 177, 1882. 

 American "Naturalist, Vol. XV, p. 75, January, 1881; Vol. XVIII, p. 1115, fig. 7, 



November, 1884. 



The type .speciuieii of this species was collected by Mr. J. L. Wortman, 

 in ISSO, in the Wind liiver Basin, Wyoming;. 



This specimen consists of portions of the lower jaws here figured. 



The geological horizon of this species is not known with certainty, 

 but is a])parently in tlie Bridg-er beds of the Eocene. 



The type specimen is preserved in Prof. Cope's collection. 



Uintatlierium latifrons, Marsh. 



Wodilciits: 11, p. 17; l'J5, lL'6, 127, 128, p. l.SO. 



Marsh, Fifth Annual lle])()rt of the Tl. S. Geological Survey, (figure from the jireseut 

 volume, viz:) fig. 48, p. 261i, 1884. 



In this species, the snout tapers in front, wliere the nasals are divided 

 by an open suture. The nasal protulierances are of moderate size, 

 broadly oval at the base, apjiroximate, and moderately divergent. The 

 nasals project well forward beyond them. The maxillar}^ protuberances 

 are large, and rounded, and are connected by a very low transverse 



