1879.] ANATOMY OF HY.-ENA CROCUTA. 97 



tending forwards for about one inch from a mesial raphe in the neck, 

 this muscle is inserted into the whole length of the shaft of the 

 humerus, from the bicipital groove down to the elbow. The fibres 

 are easily separable into a superficial and a deep stratum, thus cor- 

 responding closely to the arrangement in //. striata. 



In the Civet the pectoralis major, as in the Dog, consists of three 

 strata, whilst its insertion is much more limited than in H. crocuta. 



Pectoralis minor wanting, as in Carnivores generally^ 



Deltoid consists of two parts— one, narrow, from the tip of acro- 

 mion, and a second, wider, from the fascia covering the infraspinatus ; 

 they are inserted together into the deltoid ridge of the humerus. The 

 so-called clavicular portion of the deltoid we describe with the levator 

 humeri ; but including this element, the deltoid of //. crocuta is 

 evidently the same as Meckel describes in /f. striata, and agrees with 

 what we find in Viverra. Douglas describes the deltoid in the Dog 

 as we do in H. crocuta, the acromial and scapular portions, however, 

 not being so easily separable. 



Levator humeri proprius (Douglas) arises by two heads — one, 

 thin, from the anterior half of the neck, dorsal mesial line, and a 

 second, riband-like in character, from the mastoid process. The heads 

 unite in front of the shoulder-joint ; and the resulting belly is inserted 

 into the lower end of the shaft of the humerus, in front of the biceps. 



This corresponds to the cephalo-humeral described by Murie in H. 

 brunnea, whilst by Meckel it is in //. striata regarded as a portion 

 of the double trapezius. 



The subscapularis, from the venter scapuloe (except so much as 

 affords attachment to the serratus magnus) to the smaller humeral 

 tuberosity. In/rasjiinatus and supraspinatus are both strong and 

 well developed ; thej-, as well as the subscapularis, present no devia- 

 tion from the usual arrangement. 



Teres minor is small, but is distinct from the infraspinatus, as 

 in Civet and Dog. 



A levator scapulce (trachelo-acromial) arises from the inferior 

 border of the transverse process of the atlas, and runs to the acro- 

 mial process of the scapula. The same arrangement is mentioned 

 by Meckel in H. striata and Viverra, and by Douglas in the Dog. 



Teres major is from the upper half of the posterior margin of 

 the scapula. Its insertion unites with that of latissimus dorsi, as in 

 Civet. 



The biceps is single-headed, attached above to the upper border 

 of the glenoid cavity, and below to the inner borders of both radius 

 and ulna. In respect of origin it agrees with H. striata and Dog. 

 In the Civet the biceps is coracoid in origin, and entirely radial at 

 its insertion. 



Brachialis anticus, from almost the whole length of the posterior 

 surface of the shaft of humerus, winds round the outer side of the 

 lower half of that bone, and is inserted into the upper two inches 

 of the internal border of the ulna. The arrangenent is essentially 

 the same in the Civet and Dog. 



' Cuvier, Lemons d'Anat. Oomp. vol. i. p. 2'M'). 



Proc. Zool. Soc— 1879, No. YII. 7 



