f 70 Bulletin American Museu7n of Natural History. [Vol. XVI, 



Part I. Primates. 



I. SUPPOSED BASAL EOCENE (MONTIEN AND THANETIEN) 



PRIMATES. 



None of the Basal Eocene (Puerco and Torrejon) types 

 appear to be positively ancestral to the Lower Eocene or 

 Wasatch Primates; the Primates of the latter stage (Sparna- 

 cien) thus far appear to represent a new primate fauna like 

 the new ungulate fauna of horses, tapirs, etc. 



The Puerco and Torrejon species include a great number 

 and variety of small animals whose relationships are still 

 largely a matter of individual opinion, because the material, 

 except in the case of one skeleton (No. 823, see below), 

 affords no absolutely distinctive characters. They have been 

 referred by different authors, chiefly Cope, Schlosser, Earle, 



and Osborn,to such 

 diverse orders as 

 the Creodonta, 

 Rodentia, Condy- 

 larthra, Insecti- 

 vora, and Primates. 

 I have always in- 

 clined to refer 

 many of the smaller 

 types to the Pri- 

 mates, but without 

 being able to give 

 conclusive grounds 

 for the opinion, the 

 main reason being 

 the general adap- 

 tive resemblance 

 which they bear to 

 the existing Le- 

 murs. 



Indrodon malaris 

 (Torrejon stage) was placed by Cope in the Anapto- 

 morphidae ; this is an error. The structure of the superior 



Fig. I. A, Miocltenus acolyius. Amer. Mus. No. 82ga. 

 Lower molar. A', supposed Primate. Am. Mus. No. 823. 

 B, superior molars, enlarged 2 diam., i?', contour of same 

 still more enlarged. C, lower jaw of same specimen, 2 diam. 

 Compare Fig. 2. Twice natural size. 



