581 ROF. M. WATSON ON THE [JuilC 20, 



each metacarpal bone. In H. crocuta, on account of the rudimental 

 condition of the inner toe, the deep layer of interosseous muscles 

 consists only of eight muscles. 



Muscles of the Hind Limb. 



The gluteus maximus of Proteles resembles that of 11. crocuta, but 

 differs inasmuch as the posterior portion of the muscle is quite 

 distinct from and not united with the biceps as in H. crocuta. la 

 Viverra the gluteus maximus presents a totally different arrange- 

 ment. 



The pyriformis in Proteles, as in S. crocuta, H. striata, and 

 Viverra, is quite distinct from the gluteus medius. 



The gluteus medius is not divisible into two planes of fibres as in 

 H. crocuta. 



A gluteus quartus is present in Proteles, as in H. crocuta and 

 Viverra. The insertion of this muscle in Proteles is considerably 

 lower than in H. crocuta. In the latter it occupies the middle of 

 the anterior intertrochanteric line, whereas in the former it is in- 

 serted into the inner side of the shaft of the femur half an inch 

 below that line. 



There is only a single gemellus in Proteles. It is a strong muscular 

 bundle which surrounds the tendon of the obturator internus. In 

 H. crocuta and in Viverra the gemelli are two in number. 



The quadratus femoris is entirely absent in Proteles, which there- 

 fore differs both from H. crocuta and Viverra. 



The sonimembranosus, as in H. crocuta, is either absent or is 

 inseparably united with the adductor magnus. In this respect Pro- 

 teles differs from Viverra, in which the semimembranosus is quite 

 distinct from the addvictor magnus. 



The semitendinosus of Proteles is inserted into the tibia lower 

 down than in H. crocuta. In this respect Proteles resembles H. 

 striata. In Viverra this muscle has an additional caudal origin, 

 which is not present either in Hycena or in Proteles. 



The sartorius of Proteles differs from that of //. crocuta inas- 

 much as the muscular fibres in the upper third of the thigh form 

 a single mass, which only divides into two parts lower down. In 

 H. crocuta the two parts are separate from end to end ; in Viverra, 

 on the other hand, the muscle is single. 



The gracilis is not attaclied directly to the pelvic bone as in H. 

 crocuta, but arises from a strong aponeurosis covering the adductor 

 muscles. Its fibres are continuous with those of tlie opposite muscle. 

 Its insertion differs from that of the muscle in H. crocuta inasmuch 

 as the lower fibres are inserted into a stout fibrous band which lies 

 parallel with, and is inserted into the inner side of the tibia at the 

 junction of the lower and middle thirds of that bone. 



In Proteles, as in H. crocuta, the pectineus is single at its inser- 

 tion. In Viverra it is double. 



The origin of the adductor brevis is relatively more extensive in 

 Proteles than in H. crocuta. 



The rectus femoris of Proteles differs from that of H. crocuta and 



