86 BULLETIN 171, UNITED STATES NATIONAL MUSEUM 



MYLOHYUS cf. PENNSYLVANICUS (Leidy) » 



A jaw fragment, U.S.N.M. no. 8162, with the last two molars was 

 referred by Gidley (1920b, p. 674) to M. pennsylvanicus. These 

 two teeth are much longer and M^ is actually narrower and M^ rela- 

 tively narrower than in M. exortivus. A comparison of the first 

 permanent molars in the types of M. exortivus and M. 'pennsylvanicus 

 shows the latter to have a longer and relatively narrower M^, and by 

 inference the second molars may have been similarly proportioned. 



The Frankstown Cave form (Peterson, 1926, pi. 18) apparently 

 also has relatively narrow molnrs as indicated by the illustrations. 



The various species of Afylohyus recognized are known only on 

 rather fragmentary material, and the amount of individual variation 

 that exists in any of these species is not yet determinable. 



Family CERVIDAE 



CERVUS species 



An immature pair of fused m.etatarsals, apparently belonging to 

 an elk, shows the presence of a moderately large cervid in the fauna. 

 The cannon bone, though immature, is much too large to represent 

 Odocoileus or Eucervus. There is at present no way of Imowing 

 whether the form Sangamona is represented here, inasmuch as the only 

 described species, S. fugitiva Hay, has for a type an isolated tooth. 



ODOCOILEUS cf. VIRGINIANUS (Boddaert) 



Several upper and lower jaw fragments of deer are included in the 

 collection. No characters of diagnostic importance were observed 

 to distinguish the cave form from the living white-tailed deer, 

 Odocoileus virginianus. A comparison of the fossil dentitions with 

 those of the black-tailed deer, 0. columhianus, shows a somewhat 

 narrower inner wall in the upper premolars of the Pleistocene form. 

 This anteroposterior compression of the inner lobe of the upper pre- 

 molars is noticeable in the subgenus Odocoileus. 



Family BOVIDAE 



EUCERATHERIUM(7) AMERICANUM (Gidley) 



Figures 49, 50 



An upper dentition (fig. 49) U.S.N.M. no. 7622, of a bovid type was 

 described by Gidley (1913a) as representing a new eland, Taurotragus 

 americanus. The living eland is African in distribution and belongs 

 to a group of antilopine forms foreign to the New World. Hence, 

 the recognition of Taurotragus in a North American cave deposit 

 merits a critical reexamination of the fossil evidence. 



Comparison of the Cumberland Cave dentition with that of the 

 bovid types Euceratherium and Preptoceras was made by the junior 



»» Leidy, 1889, pp. 8-12, pi. 2, figs. 3-6. 



