NO. 6 PALEOCENE FAUNAS OF BISON BASIN — GAZIN 57 



Fig. 5. Tiianoidcs Prittwci'iis Gidley : Riglit upper molars (U. of Wyo. No. 

 1093), occlusal view. Natural size. 



Plate 12 



caenolambda from the bison basin paleocene 



Caenolambda pattersoni, new genus and species: Skull (U.S.N.M. No. 21036), 

 type specimen, dorsal view. One-half natural size. 



Plate 13 



caenolambda from the bison basin paleocene 



Caenolambda pattersoni, new genus and species: Skull (U.S.N.M. No. 21036), 

 type specimen, lateral view. One-half natural size. 



Plate 14 



caenolambda from the bison basin paleocene 



Caenolambda pattersoni, new genus and species: Skull (U.S.N.M. No. 21036), 

 type specimen, ventral view. One-half natural size. 



Plate 15 



south rim of bison basin showing fossil localities 



View westward along escarpment forming south rim of Bison basin. Fossil 

 localities indicated are as follows : a, saddle locality ; b, ledge locality ; 

 c, Titanoides locality ; and d, west-end locality. 



Plate 16 



two fossil localities in the bison basin 



Above, view eastward of ledge locality (b). Below, view southwestward of west- 

 end locality (d). 



