480 Bulletin American Museum of Natural History. [Vol. XXXIV, 
low rather wide trigonid, the pr4 connected by anterior and posterior crests with the 
closely connate p4 and mc‘, a broad open basined heel with marginal hy¢ and en, 
Ms; is nearly one half longer than m1 or me, but its crown is not preserved in the type; 
No. 15075 from the Gray Bull beds shows that its construction was like that of 
P. cttatus (infra). 
Four lower jaws from the Sand Coulée beds and eight from the Gray 
Bull beds are referved to this species, although showing considerable varia- 
tion in the anterior cheek teeth. 
An upper jaw fragment, No. 16167, from the Gray Bull beds of Clark 
— 
—— 
WM 
FA 
BBA 
=. 
Sie ace 
eA 
lh ea 
De te ie “ 
Fig. 49. Phenacolemur precoz, lower jaw, inner, outer and crown views, Type specimen, 
Sand Coulée beds, Clark Fork basin, Wyoming. 
Fork basin, is referred to this species as the molars conform in construction 
and fit very well with the lower molars of the type. They are rounded quad- 
rate in outline, paracone and metacone well separated, external in position, 
roundconic in form and with a narrow outer cingulum. The protocone is con- 
