462 The Lemuroidea and the Insectivora of the [ May, 
derived from the appearance of the lower jaw and dentition, and 
from the humerus, is that of an- ally of the coati (Nasua). 
The humerus indeed, is almost a fac-simile of that of Nasua, 
the only difference being a slight outward direction of the 
axis of the head. The same bone resembles also that of many 
marsupials, but the flat ilium, elevated position of dental for- 
amen, and absence of inflection of the angle of the lower 
jaw, etc., render affinity with that group highly improbable. 
a tt a 
Fic. 6.—Tomitherium rostratum Cope, fore leg of animal represented in Figs. 
5-7, nat size. Fig. a, humerus; 4, ulna; c, radius, from front; 4’, from ag ars 
proximal end (artificially flattened below w); ¢’’’, distal end of radius. From 
beds of Wyoming. Original, from Report U. S. Geol. Surv. Terrs., Vol. e. 
The length of the femur indicates that the knee was entirely 
free from the body as in the Quadrumana, constituting a 
marked distinction from anything known in the Carnivora, in- 
_ cluding Nasua. The round head of the radius indicates a com- 
plete power of supination of the fore foot, and is different in form 
from that of Carnivora, including Nasua; and, finally, the distal 
