104 
CREODONTA. 
Length of a proximal phalange. 0. 015 
Vertical diameter of the proximal end of the same. 0. 005 
Length of a caudal vertebra.. 0. 026 
Diameter of the extremity of the same... 0. 010 
The pieces above described were all found together and alone, where they 
had weathered from the rock, and without apparent intermixture of other 
individuals. Accompanying them is the olecranon and adjacent portion of 
an ulna of such small size that I hesitate to refer it to the same species. It 
may pertain to it however, and, if so, indicates a reduction in the size of 
the fore limb still greater than that observed to characterize the hind 
limb. The end of the olecranon is subvertically truncate and compressed, 
and vertically grooved: its depth, 0“.012; length, 0®.012; depth of ulna 
at the glenoid emargination, O^.OOS. 
The second specimen, of the same size as the preceding, presents nearly 
all the teeth, except the last two inferior molars, so that some specific charac¬ 
ters cannot be verified on it. The remainder of the fragments are all cranial. 
The superior molars are a little smaller than those of the typical specimen, 
but resemble them closely, except in the rather larger inner tubercle of the 
third premolar. The 2 )osterior transverse molars of both sides are partially 
preserved, exhibiting an external blade, a median cusp, and a small lobe of 
the blade between them. Of the inferior premolars, only the fourth possesses 
an anterior basal tubercle; the second, besides the posterior lobe, possesses 
a posterior basal tubercle. The enamel is rugulose. There is a weak 
cingulum on the outer base of the true molars, and a similar one at the 
exterior base of the posterior lobe of the premolars. The foramen infra- 
orhitale exterius is of medium size, and issues above the third premolar. The 
mental foramina are two: one below the first premclar; the other below the 
posterior margin of the third premolar. 
The mandibular ramus is deeper than in Dogs and Cats, and more 
compressed. The inferior border is but little thickened, and is gently convex 
downward below the posterior molars. The masseteric fossa is well defined 
anteriorly, but not inferiorly, and the coronoid process is elevated and thin. 
