72 BULLETIN 171, UNITED STATES NATIONAL MUSEUM 



entire; only the left required restoration. All the parts of the hind 

 feet are represented, but in this case one or two elements have been 

 substituted from the general collection. 



Peccaries were one of the commonest forms found in the cave, ex- 

 ceeding even the black bears in quantity of material. There are 22 

 skulls more than half complete, 12 of which are nearly entire. Seven- 

 teen mandibles including the greater part of both rami are preserved. 

 In addition to the skeleton described above, there is also an articulated 

 hind foot (fig. 45) and a large number of isolated vertebrae and limb 

 and foot bones. 



The following characters were given by Gidley as distinguishing P. 

 cumberlandensis from other Pleistocene species of Platygonus: 



A large species, nearly equalling P. veins in size. Length of cheek-tooth series, 

 type (male) 94 mm.; paratype (female), 87 mm. Differs also from P. vetus in 

 having a greater relative length of the molars in animals of corresponding age, 

 and in the possession in the upper molars of well-developed intermediary cusps 

 and lophs, which connect at their bases the two principal cross lophs, as in P. 

 compressus and P. leplorhinus. It differs from both these last named species in 

 the much larger size of the skull, in which there is a relatively higher and more 

 backwardly produced inion and a more strongly developed expansion of the 

 zygoma, the latter being about one and one-third times the vertical diameter of 

 the orbit in the females, and two or more times this diameter in the males. 



Apparently the most distinctive features of this form are the elon- 

 gate skull, the marked backward projection of the inion accompanied 

 by a decided backward-sloping occiput, and the unusual extension of 

 the zygoma downward and forward from the orbit. The develop- 

 ment of the zygoma varies considerably with the age of the individual 

 and between sexes, but it seems to have progressed farther in this 

 species than in others as known. 



A second species described by Gidley as Platygonus intermedins (figs. 

 42-44) does not appear to possess sufficiently well defined characters 

 to justify distinct recognition. The relative sizes of teeth and skull 

 and the length of the diastema between canine and second premolar 

 are not persistent enough throughout the series of specimens to war- 

 rant this specific division. 



A comparison of the limb and foot material of P. cumberlandensis 

 with that described by Leidy (1889a) as belonging to P. compressus 

 and that for P. leptorhinus by WilHston (1894) disclosed important 

 characters in the Cumberland Cave form. P. cumberlandensis pos- 

 sesses longer and heavier limb bones in keeping with the larger and 

 more elongate skull in this form than in either P. compressus or P. lep- 

 torhinus. This may be noticed even in the relatively slightly built 

 female skeleton. On the other hand, the foot bones, particularly the 

 metacarpals and metatarsals, though usually as large and in some 

 instances larger than in the two earhcr described species, are relatively 

 short in proportion to the limb elements. This is clearly illustrated 

 in the proportions of the fore and hind hmbs of the articulated skeleton. 



