34 Bulletin American Museum of Natural History. [Vol. XXXIV, 
type show that the animal was a little larger than M. parvivorus although the 
jaws are of the same size or slightly smaller. The vertebral centra (caudals 
No./51/176 
MY, £4: 
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Fig. 28. Miacis exiguus, palate, twice natural size, with outline of actual size. 
specimen (fragmentary skeleton), Gray Bull beds, Big Horn Basin. 
Type 
and lumbars) are more robust, the limb bones heavier, but their length 
cannot be determined. 
Fifteen lower jaws from the Gray Bull horizon of the Big Horn Wasatch 
are referable to this species. 
Miacis latidens sp. nov. 
Type, No. 14766, lower jaw and part of maxilla, with m_; and m!~2, from the Lost 
Cabin beds of the Wind River Basin. 
Distinctive characters: Pi—m3 = 35 mm., Mi-s = 16 mm. Upper molars with 
