48 KANSAS UNIVERSITY QUARTERLY. 



stronger both relatively and actually. The anterior end of the 

 ilium stands nearly vertical and the crest is curved strongly out- 

 ward. The gluteal surface is divided longitudinally by a strong 

 ridge, extending from the acetabulum to the crest. This character 

 is even more prominent in H. robiistus and is found also in Dinictis. 

 Above it there is an elongated fossa, below a slightly concave 

 surface. The muscular roughening for the rectus femoris is more 

 prominent and extends further forward than in the lion. A sharp 

 line separates the gluteal surfaces. The border below the aceta- 

 bulum is thin and sharp. The ilec-pectineal eminence is scarcely 

 noticeable. The iliac surface of the ilium is convex, the articulation 

 with the sacrum close and admitting of little motion. The iliac 

 ramus of the ischium is thicker, narrower and more rounded on 

 the superior border than in the lion. The pubic ramus is thin 

 and flat. The spine of the ischium is situated near the middle of 

 the iliac ramus. The pubic symphysis is firmly co-ossified. The 

 ischiatic ramus of the pubis is concave above, and is nearly as 

 strong at posterior, as at the anterior end. 



Hind f^eg. The femur has more of the characters of the recent 

 cats than has that of H. robustus. The shaft is straighter, the 

 third trochanter less prominent, and not connected with the great 

 trochanter by a sharp ridge. The head is directed less forward, 

 and the patellar surface forms an anterior prominence. The great 

 trochanter projects only slightly beyond the head. A marked 

 groove extends downward from the pit for the ligamentum teres. 

 On the outside of the shaft there is a prominent, roughened pro- 

 tuberance extending thirty-five millimeters above the condyle, 

 which is not present in H. robustus or in the recent cats. The 

 patella is rather long and narrow and is irregularly rounded on the 

 anterior surface. The articulating face covers two-thirds of the 

 posterior surface. It is concave vertically' and convex from side to 

 side. 



The tibia is a strong bone, slightly curved forward, and laterally 

 compressed. The anterior border is sharp and has a marked 

 protuberance about midway of its length, where it makes a sharp 

 curve inward. As seen from behind both borders are concave, 

 that of the inner being slightly more marked. There is a distinct 

 articulating facet for the proximal end of the fibula. The internal 

 malleolus is strong and projects somewhat inward, ending in an 

 angle toward the posterior border. The groove for the tendons of 

 the tibialis anticus and the flexor longus digitorum is broad and 

 shallow and is directed more obliquely forward than in the lion. 



