Am. Jour. Sci., Vol. XLIII, 1892. 



Plate VI. 



6x3 



dx3 



6x3 



3. 

 Cx3 



dxs 



bx2 



Cx2 



dx2 



a bx2 cx2 dx2 a 



B H 



ixs 



Cx 3 



dx3 



American Cretaceous Mammals. 



