582 PROF. M. WATSON ON THK [JunC 20, 



The obliqims eccternus abdominis arises in Proteles from the last 

 ten ribs. In H. c.rocuta 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 deltoid 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. brimnea 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 scapulae 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 teres 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 radiates 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 



' Log. cit. 



'^ " The Muscular Anatomy of the Civet and Tajra," Proc. Roy. Irish Acad, 

 vol. i. ser. 2, p. 506. 



