582 PROF. M. WATSON ON THE [June 20, 
The obliquus externus abdominis arises in Proteles from the last 
ten ribs. In H. crocuta it arises from the last eleven ribs. 
Muscles of the Fore Limb. 
In Proteles the pectoralis major resembles that of H. crocuta, but 
takes an additional origin from the abdominal aponeurosis. The 
separation of the muscle into two strata is more complete in Pro- 
teles than in H. crocuta. In the former the posterior fibres form 
almost a separate muscle, which has a special insertion into the 
great tuberosity of the humerus; while the anterior fibres are in- 
serted, as in H. crocuta, into the whole length of the shaft of that 
bone. In Viverra the muscle is divisible into three strata, and its 
insertion is confined to the upper third of the humerus. 
The dedéoid muscle is not divisible into two parts as in H. crocuta, 
the two portions being quite continuous with one another. 
The levator humeri proprius (Douglas) of Proteles differs from 
that of H. crocuta inasmuch as it is inserted into the upper end of 
the radius and more especially of the ulna, and not, as in H. crocuta, 
into the lower end of the humerus. In this respect Proteles differs 
likewise from H. Grunnea and from Viverra (according to the obser- 
vations of Young’). According to Macalister 2, however, in Viverra 
this muscle extends, as in Proteles, as low down as the upper end 
of the radius. 
The levator scapule in Proteles is chiefly inserted into the fascia 
covering the infraspinatus, and to a less extent into the acromion 
process. In H. crocuta the reverse is the case. 
The ¢eres minor in Proteles is quite inseparable from the infra- 
spinatus. In this respect Proteles differs from both H. crocuta and 
Viverra. 
The brachialis anticus in Proteles is inserted partly into the 
radius and partly into the ulna. In H. crocuta it is inserted into 
the ulna alone. 
The triceps of Proteles differs from that of H. crocuta in the 
possession of a fifth head. This fifth head forms the most super- 
ficial part of the muscle, and consists of a narrow fleshy band which 
arises from the middle in length of the spine of the scapula, where 
it lies superficial to the infraspinatus. It passes downwards parallel 
to and in contact with the glenoid head of the triceps, and is in- 
serted into the olecranon process along with the rest of the muscle. 
This head is absent not only in H. crocuta but in Viverra. 
The supinator longus is entirely absent in Proteles, not even 
being represented by a tendinous band as in H. crocuta. In Viverra 
the muscle is quite distinct, although of small size. 
The extensores carpi radiales resemble those of H. crocuta inas- 
much as they are partially fused together. In this respect Proteles 
differs from H. striata, in which these muscles are quite distinct. 
The tendon of the extensor carpi ulnaris in Proteles gives off a 
1 Loe, cit. 
* “The Muscular Anatomy of the Civet and Tayra,” Proc, Roy. Irish Acad. 
vol. i. ser. 2, p. 506. 
