746 General Notes. [ October, 
025 m.; transverse .014; vertical .022. Length of heel of tuber- 
cular sectorial .006; width of same .oo6. Vertical diameter of 
base of crown of canine .022. Depth of mandible at last molar 
042. Length of femur (condyles inferential) .300; diameter of 
shaft at middle .034. 
(8) Stypolophus strenuus Cope. (9) Siypolophus bicuspis sp. nov. 
Smaller than the S, minor Filh., hence the least species of the 
genus. It is represented by a nearly complete skull with entire 
dentition of both jaws. Premaxillary bones rather elongate ; 
general form of skull that of a civet. Crowns of second and third 
superior premolars compressed, with a prominent cusp behind 
the principal one. First and second true molars with two 
distinct external cusps and a strong external basal cingulum. 
Inferior first premolar one-rooted; third with a posterior heel, 
5. 
(11) Coryphodon sp. indet. Perissodactyla. (12) 
Palæosyops borealis sp. nov. Founded on a portion of the right 
fevidens. Anterior median tubercle well developed ; anterior and 
posterior cingula strong, not rising to inner cones. A low ridge 
extending outwards and forwards from posterior cone. Enamel 
smooth. Differs from P, junior Leidy in the presence of the 1n- 
termediate tubercle and crest, and in the weak external cingulum. 
gth of true molar series .063; diameters of first true molar, 
anteroposterior, .019; transverse, .020 
tema in front of the second inferior premolar. Presence of first 
inferior premolar not ascertained. Fourth inferior premolar with- 
out posterior cusps. Superior molars with an angular ridge 
extending inwards from each inner cusp. Last inferior molar 
with heel. This genus differs from Oligotomus in the simplicity 
of the fourth premolar, which has, in the latter, two posterior 
