LEONTINIA GAUDRYI 115 
being by far the commonest fossil of the Deseado beds on 
the Chico del Chubut River, west of Puerto Visser. As 
mentioned above, there are two types, the first, with larger 
i 
Saae 
7. 
, Fig. 70. Lower Fig.71. Lower den- 
Fig. 69. Right upper dentition dentition of male tition of female—1r/2 
—1/2 natural size. —1/2naturalsize. natural size. 
canines and heavier mandibles, designated by Ameghino 
as L. gaudryi, which I consider males; second, those with 
smaller canines, and lighter mandibles, slightly smaller in 
size, which Ameghino designated L. oxyrhynca and I con- 
