PLEISTOCENE VERTEBRATES FROM CUMBERLAND CAVE 



39 



the pterygoids approach each other somewhat more than in the li\dng 

 species. However, skull U.S.N.M. no. 8176, the type as designated 

 by Hall, in the cave collection, is not so broad through the muzzle, and 

 the posterior narial aperture is not different from that in an average 



PiGURK 20.— Gwio gidleyi Hall: Skull (U.S.N.M. no. 8175), dorsal and ventral view. Two-thirds natural 



size. 



modern specimen of Gulo luscus. The occipital condyles in no. 8175 

 are close together, and the foramen magnum is correspondingly small. 

 Unfortunately the occipital region is missing in other skull portions 

 from Cumberland Cave, but the distance between the condyles lQ' 

 living specimens of G. luscus varies sufficiently to include the condition 

 seen in no. 8175. 



