MUSCLES OF THE FORE LIMB. 21 



MUSCLES OF THE FORE LIMB. 



The coracoidcus (Plate 6, fig. 5, c) arises by a conspicnious tendon from the 

 ental face of the coracoid process. The caput breve is inserted on the inner 

 mesial surface of the humerus at a jwint L3 mm. from its head; the caput longe 

 passes as a tendinous band from 2 to 3 mm. wide expanding somewhat distally 

 to its insertion on the i)ostero-internal portion of the humerus just proximal to 

 the epitrochlea. Dobson makes the brief statement that this muscle in Soleno- 

 don is very similar to that in Erinaceus and Centetes. In Gymnura and Myogale 

 the muscle was not detected, while in Potamogale the caput longe was wanting. 



The subscapuhiris (Plate 5, fig. 5, a) is strongly developed. It is attached 

 on the subscapular surface of the scapula, and arises from three rather distinct 

 sets of fibers: (1) a st't originating along the coraco-vertebral margin of the 

 scapula nearly to the coraco-vertebral angle; (2) fibers from the vertebral 

 margin of the scajiula near the insertions of levator anguli scapulae and serratus 

 magnus; (3) a l)undle of fibers arising along the glenoid margin of the scapula, 

 partly on the ental surface of the latter. Tendinous fibers from these three 

 divisions run forward as a large tendon to an insertion on the trochin of the 

 humerus vmderneath that of the coracoideus. 



The large supraspinalus (Plate 5, fig. 6, Q is from almost the entire supra- 

 spinous fossa except its most posterior portion, from the coraco-vertebral margin 

 to the margin of the mesoscajnila, becoming tendinous as it passes under the 

 acromion to its insertion on the trochiter. 



The spino-deltoidciis arises along the mesoscaj)ula from just posterior to the 

 metacromion. It passes forward antl slightly inwaixl, to its insertion on the 

 crista deltoidea of the humerus. Here it is joined by the (icroniiu-deltoideus from 

 the infraspinous border of the acromion, a smaller, narrower muscle. 



The origin of tlie injhi>:pin<ilt(.^ (Plate 5, fig. 6, /() is undei'neath that of 

 spino-deltoideus, from the whole length of the infrasj)inous fossa, except at the 

 gleno-vertebral angle, where it meets and partly unites by a raphe, with the 

 teres. Its tendon inserts on the trochiter, adjacent to that of the supraspinatus, 

 but slightly distal to it. 



The peculiar relations of the cpHwchlcaris (Plate 5, fig. 5, d) have been 

 described by Dobson in Solenodon cubanus and they are the same in S. para- 

 doxus. This muscle arises from a raphe about IS nmi. long, from the commence- 

 ment of the tendinous jiortion of the latissinms dorsi. It is also connected at 

 this point by a few fibers from the teres. The insertion is at the olecranon. 



