Am. Jour. Sci., Vol. XXXVIII, il 



Plate 



6.x2 



5.X2 



i.x2 9.x2 10. x2 



12.x2 



13.x2 



11. 



23.x2 



14. 



15.X2 



16.X2 



H.xt 



19.X2 



20x2 



21.X2 



American Cretaceous Mammals. 



