No. 2324. PECCARIES FROM CUMBERLAND CAVE—QIDLEY. 



673 



^ 



berland Cave deposit. It is larger than any of the female skulls 

 from the latter locality, but the teeth have about the same dimen- 

 sions, and much the general appearance of those of specimens I 

 have referred to P. intermedins. It differs from 

 both Cumberland Cave species in the reduc- 

 tion of the upper incisors to a single pair. This 

 character, however, should not be relied upon too 

 strongly, since the second pair of incisors is 

 much reduced in all species of this genus. Their 

 occasional absence might mean no more than an 

 individual variation. Still another form seems to 

 be represented by a skull (No. 8151 U.S.KM. Coll.) 

 in which the characters of the teeth differed more 

 than might be expected between individuals of the 

 same species. In this specimen the canines are rel- 

 atively long, slender, sharply pointed, and their 

 sides, or plains, are evenly convex, showing none 

 of the longitudinal grooving usually observed. The 

 cheek-teeth have the main cusps relatively higher, 

 more evenly cone-shaped in outline, and the apices 

 of the transverse pairs of cusps, especially in the 

 premolars, more nearly approach each other than is 

 usual in species of Platygonus. The specimen, which 

 is that of a young adult female, is too badly crushed 

 to make out some of the more important skull char- 

 acters. There seems to be little variation in foot 

 structure in species of this genus. (See fig. 10.) 



Genus MYLOHYUS Cope. 



Type. — Dicotyles nasutus Leidy. 



(For definition of genus see p. 656.) 



Three seemingly valid species of the genus have 

 been described, all so far as known being confined 

 to the Pleistocene. In every case the t5^pe speci- 

 mens and subsequently collected material are frag- 

 mentary, yet they consist of sufficiently character- 

 istic parts to admit of a reasonably clear definition 

 for the genus as given above. The material col- 

 lected and described by Brown from the Conard 

 Fissure is especially enlightening and from it we 

 have our first definite knowledge of the foot modifi- 

 cations of this group. The material from the Cumberland Cave here 

 described, likewise fragmentary, not only contributes something in 

 working out clearer definitions for the species hitherto proposed, but 

 adds a new species to the genus. 



144382— 20— Proc.N.M.vol.57 43 



Fig. 10.— Platygo- 

 nus CUMBERLAND- 



ENSis. Left hind 

 FOOT. X i. Spec- 

 imen FBOM Gum- 

 bee LAND Cave. 

 Cat. No. 7690, 

 U.S.N.M. 



