212 



DINOCERATA. 



Tiiioferas juftiim, Marsh. 



AVooileut: is 7, Ijelow. 



FiSDRE 187. — Nasals of Tinoceras jugum, Marsli (No. 15U0). 

 o. side view ; h. top view ; c. front view. 



Oiie-fiflh natural size. 



In this s^jecies, tlie snout tapers forward, and bears a pair of small 

 flattened tubercles, directed well outward and forward. The nasals are 

 thoroughly coossified, and ])roiect in front beyond the tubercles. The 

 maxillary protuljerances are high, and strongh' divergent. They 'Avq 

 connected by a high sliarp ridge, which suggested the speciflc name. 



The type of this species (number 1500) was found by I\Ir. L. Lamotte, 

 in Septen\ber, IS 74, in Wyoming. 



The specimen consists of portions of the skull, and fore lindjs. 



The geological horizon is in the Bridger beds of the Middle Eocene. 



The only remains known are in the Yale Museum. 



TiuOClTaS lilCllstre, Marsh. 

 Woodfut: ls8, below. 



Fig, 188. 



Figure IffS. — I'pper molars of yinoceras /(/tusire. Marsh {No. UlHTi; seen from below. 

 rii. first true molar,; pm. first premolar. 



Three-fourths natural size. 



Marsh (Dinoeeras lacustris). — Ameriean Journal of Science and Arts (3), Tol. IV, 

 p. 344, October, 1872. 

 Proceedings of the American Philosophical Society, Vol. XIII, p. 256, 187.1. 

 Cope (Uintatherium lacustre). — Hayden's Report IT. S. Geological Survey for 

 1872, pp. 581, 584, 187:!. 

 Proceedings of the American Phil(>s(i]]liical Society, Vol. XIII, pp. 01, 66, 1873. 



