1882. ] ANATOMY OF PROTELES. 585 
Viverra, but resembles that of H. striata, in the possession of only 
a single head of origin, the reflected head being absent. 
The soleus in Proteles, as in H. crocuta, is absent, whereas in 
Viverra that muscle is present. 
The plantaris resembles the corresponding muscle of H. crocuta, 
and differs from that of H. striata and Viverra inasmuch as it is 
not prolonged to the sole of the foot. 
The popliteus is of relatively smaller size in Proteles than in H. 
crocuta, the belly of the muscle being confined to the upper third of 
the tibia. 
The tibialis posticus of Proteles resembles that of Viverra in the 
possession of a fibular head of origin. This head is absent in H. 
erocuta. The tendon of the muscle in the latter is inserted into the 
entocuneiform and scaphoid bones ; whereas in Viverra and Proteles 
it is inserted into the scaphoid bone alone. : 
The flecor brevis digitorum is represented only by tendon, as in 
H, crocuta, but differs from the latter inasmuch as that tendon is 
quite continuous with the plantaris. In H. striata and Viverra the 
flexor brevis digitorum has a distinct muscular belly. 
The origin of the flewor longus digitorum in Proteles differs from 
that of H. crocuéa inasmuch as its inner head arises not only from 
the head of the fibula, but also from the oblique line of the tibia. 
The outer head arises, as in H. erocuta, from the fibula alone. In 
Viverra, on the other hand, the outer head of the flexor longus is 
attached to both bones of the leg. 
The flewor accessorius is absent. Proteles in this respect resembles 
H. striata and differs from H. crocuta and Viverra. 
The lumbricales of Proteles resemble those of H. crocuta in being 
three in number. They are inserted into the second, third, and 
fourth toes. The inner toe has no lumbrical muscle. In Viverra 
there are four lumbrical muscles. 
The tibialis anticus in Proteles resembles that of H. erocuéa in 
having two tendons, one of which is inserted into the entocuneiform, 
the other into the first metatarsal bone. In Viverra the origin of 
this muscle differs from that of Proteles inasmuch as it arises from 
both bones of the leg, and has only one tendon of insertion, which 
is inserted into the first metatarsal bone. 
In Proteles, as in H. crocuta, the ewtensor hallucis is represented 
merely by a slip from the tendon of the tibialis anticus. In Viverra, 
on the other hand, the muscle is well developed. 
The tendon of the eatensor longus digitorum of Proteles divides, 
as in Viverra, into four slips for the four anterior toes. In H. cro- 
cuta there are only three slips, which are inserted into the second, 
third, and fourth toes. 
The extensor brevis digitorum of Proteles differs from that of H. 
erocuta and H. striata in giving off only two tendons, which pass 
to the second and third toes. In Hyena three tendons are given 
off by this muscle, which are inserted into the second, third, and 
fourth toes, while in Viverra there are four tendons, which pass to 
the four inner toes. 
