244 



BULLETIN 169, UNITED STATES NATIONAL MUSEUM 



HAPLALETES DISCEPTATRIX Simpson 



Figures 68, 69 

 Haplaletes disceplatriz Simpson, 1935d, p. 244. 



Type.— U.S.'^.M. no 9500, right lower jaw with P3-M3. Collected 

 by A. C. Silberling. 



Paratype. — U.S.N.M. no. 9555, right upper jaw with P^-M^ Col- 

 lected by Dr. J. W. Gidley. 



Figure 68. — Haplaletes disccptatrix Simpson, U.S.N.M. no. 9500, with parts in outline supplied from 

 U.S.N.M. no.f9600, right lower jaw: a. Crown view; 6, internal view. Four times natural size. 



Figure 69. — Haplaletes disceptatrix Simpson, U.S.N.M. no. 9555, right upper jaw: a, E.xternal view; 

 6, crown view; r , internal view. Four times natural size. 



Horizon and locality. — Gidley Quarry, Fort Union, Middle Paleo- 

 cene horizon. Crazy Mountain Field, Mont. 



Diagnosis. — Sole known species of genus. Dimensions in tables|55 

 and 56. 



Discussion. — This delicate little species is the smallest condylarth 

 in the quarries, and only Litolestes includes smaller known species in 

 this order. 



