PAL^OSYOPS, 703 



second superior premolar has but one outer tubercle. The cingula are 



much less developed than in that species, those between the inner cones of 



the molars being entirely absent. These cones are low, and, with the rest 



of the crowns of all the teeth, covered with smooth and shining enamel. 



The anterior median small tubercle of the first true molar is wanting. The 



last true molar has but one interior cone. The canine tooth is powerful 



and bear-like, and has a rather short crown. It is wide in front, and has a 



cutting ridge posteriorly. The crowns of the incisors have prominent but 



not cingular bases. 



Measurements. 



M. 



Length molar series 0.140 



Length true molars 085 



Length three incisors 034 



Length crown canine 030 



Length crown last molar 039 



Width crown last molar 036 



Length cranium to lateral occipital crest 345 



The teeth of the Washakie specimen are very smooth, but the basal 

 cingula of the premolars are stronger than in the specimen above described. 



Measurements of No. 2. 



M. 



Length true molars (No. 2) 0.101 



Length last molars (No. 2) (oblique) 039 



Width last molars (No. 2) transverse) 038 



This species was about the size of the Anoplotherium commune, Cuv., 

 and intermediate between the Palceotherium magnum and P. medium. It is 

 considerably larger than the existing tapirs, and was one of the most 

 abundant of the quadrupeds of the Eocene of North America. 



Pal^siosyops borealis Cope. 



American Naturalist, 1880, p. 746. Bulletin U. S. Geological Survey Terrs., 1881, vol. vi, p. 196. 



Plate LVIII a, fig. 3. 



At present the only parts of the skeleton of this species which are known 

 are the following : Part of the right maxillary bone, with four molar teeth; 

 distal portions of both radii ; a lunar bone, and a basal median phalange. 

 These fragments indicate a species much smaller than P. Icevidens and about 

 equal to the Limnohyiis fontinalis. 



The true molars increase rapidly in size posteriorly. The external Vs 



