THE EXTREMITIES OF ORYCTEROPUS CAPENSIS. 575 



Both the latissimus dorsi and the teres major are so intimately connected in Myrmeco- 

 phagajubata, that Pouchet, in his monograph upon this species of Anteater 1 , thinks it 

 necessary to describe them together. With regard to the terminal portions of these 

 muscles, he says, " Les deux tendons se confondent en partie. Toutefois ce dernier [the 

 latissimus dorsi] s'insere plus haut que le precedent sur le bord de la gouttierc bicipitale." 



Pectoralis major.— A muscle of large extent. Arises from the manubrium of the 

 sternum and from the rest of the bone, in the middle line, and, besides communicating 

 on its outer side with the latissimus dorsi, is continued into the abdomen, according to 

 Prof. Humphry 2 , and Cuvier's plates 3 , to fuse with the external oblique. The wide and 

 somewhat irregular gap in the abdominal walls of the specimen which I examined, caused 

 by the long median incision, did not allow of any certainty of dissection or description. 



ted port 



There was no claviculai , 



The manubrial portion of the muscle, which has the greatest thickness 

 highest into the ridge running upwards from the deltoid trochanter; its insc 

 is, moreover, continuous with fascia covering the outer tuberosity of the humerus. A 

 deeper layer of the same portion finds insertion a little to the inner side of the former, 

 and is continuous, through the intervention of tendon, with the terminal portion of the 

 rest of the muscle — which, in its turn, communicates at insertion with the lower part of 

 the more superficial layer of the manubrial division, forming thus a shut sac, having the 

 concavity upwards. 



The lowest part of the tendon of insertion, which is thicker than the rest, owing to the 

 approximation and fusion together of the walls of the above-described sac, is continued 

 downwards to join the common tendon of insertion of the biceps and clavicular division 

 of the deltoid. 



Pectoralis minor. — A narrow, but very distinctly defined muscle, quite separable from 

 the superjacent pectoralis major, though only differentiated from it by the intervention 

 of cellular tissue, and not by any fascial stratum. It has an origin from the sternum, 

 tendinous above and fleshy below, at about the level of the articulation of the fourth, 

 fifth, and sixth costal cartilages with this bone. It then passes across the axillary space, 

 running parallel with the subclamus, to join the upper part of the tendon of insertion of 

 the pectoralis major (that part, namely, in which the deeper layer of the manubrial 

 division of this muscle terminates) — which portion of the tendon is also continued over 

 the shoulder, covering the tendon of origin of the biceps, and the tuberosities of the 

 humerus. 



Coraco-brachialis. — Is a single muscle, not complicated by any attachment to, or fusion 

 with, the biceps. It is represented by the "long variety " of Wood only. Origin is taken 

 from the superior extremity, and from along the inner edge of the coracoid process of the 

 scapula, by a strong tendon, which, at the level of the inner tuberosity of the humerus, 

 joins the body of the muscle — a few fibres, derived from the upper edge of the subscapu- 

 laris, passing over it at this spot to their insertion at the above tuberosity. The muscle 

 terminates at the inner supracondyloid ridge, its fibres being inserted into both the 



1 Op. cit. pp. 6 & 7, and pi. ii. fig. 1, pi. iii. fig. 1. 

 8 Loc. cit. p. 296. ; 



Op. cit. pi. 254. fig. 2, and pi. 255 



VOL. XXVI. 



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