584 ROF. M. WATSON ON THE [June 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 H. 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. In 
Viverra the gluteus maximus presents a totally different arrange- 
ment. 
The pyriformis in Proteles, as in H. 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 
Hi. 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 gemedlus in Proteles. Itisa 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 semimembranosus, 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 adductor 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 Hyena or in Proteles. 
The sartorius of Proteles differs from that of H. 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 attached 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 the opposite muscle. 
Its insertion differs from that of the muscle in H. ecrocuta 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 
