302 SHOULDER-GIRDLE IN MONOTREMES, 



brachialis longus, arising from the coracoid and inserted on the 

 internal condyle and the anterior surface of the humerus. (2) 

 M. coraco-brachialis brevis, arising from the posterior angle of the 

 coracoid and inserted on the tuberculum minus and the anterior 

 surface of the humerus, in the depression between the two tuber- 

 osities. (3) The epicoraco-brachialis (Coues), which arises from 

 the dorsal face of the epicoracoid, and is inserted between the 

 M. subscapularis and the M. coraco-brachialis brevis on the tuber- 

 culum minus. Westling further remarks that the M. epicoraco- 

 brachialis is supplie 1 by a nerve from the N. musculo-cutaneus 

 which springs from the Nn. cervicales v. and vi. 



Leche follows Westling. 



MiVART says, of the coraco-brachialis — " This muscle is very 

 largely developed, and consists of at least two distinct parts, one 

 long, and the other short. Both portions have a common origin 

 and arise from the distal end of the coracoid, and chiefly from that 

 part of it which looks towards the first rib. The long part passes 

 downwards and is inserted into the internal condyle on the 

 anterior surface of the bone. There is a good deal of tendinous 

 fibres at the common origin ; but that border of the long portion 

 which is next the biceps is especially tendinous. The short 

 portion is inserted into the whole anterior face of the lesser tuber- 

 osity and into part of the wide bicipital groove, and is covered by 

 a long portion. A similar division of the coraco-brachialis appears 

 to exist in Ornithorhynchus (Meckel)." 



" Besides this double coraco-brachialis there is a small third 

 portion, unless, indeed, it should be reckoned a distinct muscle. 

 This arises from the external part of the deep or inner surface of 

 the epicoracoid, and is inserted, by a distinct tendon, into the 

 lesser tuberosity of the humerus, close and somewhat superficial to 

 the insertion of the subscapularis. At its innermost part it is 

 ntimately united with the adjacent portion of the short part of 

 the coraco-brachialis. It appears to me not improbable that it 

 may answer to the muscle which in the common fowl arises from 

 the inner surface of the coracoid, and is inserted into the lesser 

 tuberosity of the humerus." 



