172 KANSAS UNIVERSITY QUARTERLY. 



anterior basal cusp, though the thin edge is slightly convex; heel 

 small, simple. Fourth premolar large, prominent, with the anterior 

 basal cusp better developed than in the cat, the heel simple, with a 

 cutting edge, and its width nearly equal to half the width of the 

 main cusp. Molar much as in the cat, save that there is a well- 

 developed internal posterior tubercle, and the heel is rudimentary. 



In the following table I give measurements of Pogonodon platycopii 

 Cope for comparison: 



1'. ijlutijeojiiK. D. utrox. Por/onodunf 



Length of inion to premaxillary 280. . . . 260. . . . 



Length from premaxillary border to superior 



canine 19.... 20.... 



Length from premaxillary border to line of 



orbit. 



90.... 97 



Length from inion to occipital condyle 48 . . . 60 ... . 



Length of inion to furcation of temporal ridges 115.... 98 ... . 



Width of zygomata 192*. . . 145 .... 



Width of occiput at middle 37 • • • • 45 • • • • 



Width of occiput at condyles 56 ... . 56 ... . 



A\'idth of foramen magnum 26 . . . 22 ... . 



AVidth of post-tympanic process 74 ... . 80 ... . 



Greatest diameter of orbit .... 42 ... . 



Transverse diameter of nares .... 26 ... . 



Greatest diameter of infraorbital foramen. ... .... 15. • • • 



Length of superior dental series including canine 90.... 92.... 



Long diameter of base of canine 26 ... . 30 ... . 



Height of chin at flange 48 ... . So ... . 62 



Height of ramus at third premolar 35 • • • • ?>-■■■■ 32 



Height of ramus at first molar 30. . . . 31 ... . 31 



I>ength of mandibular ramus 177.... 1 64 . . . . 



Height of ramus at coronoid process 75,... 50.... 



Width of inferior canine at base of crown i3- • • • 13 



Width of second lower premolar .... 3 



Length of third premolar 12.... 



Length of fourth premolar 17.... 16 



Length of inferior molar 



23 



Length of space between canine and third premolar. . . 42 ... . 32 



Diastema back of second premolar .... 6 



Length from anterior margin of the masseteric fossa to 



the canine ridge 100 ... . 92 



Length of crown of upper median incisor 11 ... . 



Transverse diameter of same at base 6 . . . . 



Length of crown of outer incisor 14. . . . 



Antero-posterior diameter of same at base 10 ... . 



Length of crown third upper premolar 12 ... . 



Length of crown fourth upper premolar 25 ... . 



Width of same in front 10. . . . 



Length of molar 12.... 



Width of same 6 . . . . 



^•■Approximately. "' 



