THE MUSCLES OF THE UPPER EXTREMITY. 95 



the muscle consists in keeping the coracoid firmly in 

 place and preventing its dislocation during violent action 

 of surrounding muscles (see Figs. 8 and 25). 



61. The coraco-brachialis l (Figs. 8 and 27) is a 

 long fusiform muscle that arises by a delicate tendon 



1 My dissections of the coraco-brachialis in Corvus convinced me 

 that it had the same origin and insertion described for it by Owen 

 (Anat. Verts., vol. ii. p. 97) ; but I find that Gadow, who calls the 

 muscle the subcoracoideus, finds a different arrangement of things, 

 for he says that, " Bei Corvus, Garrulus, und Paradisea entspringt 

 ein Theil von Binnenseite und dem Vorderrander des Sternum und 

 von der Tnnenflache des benachbarten Coracoidtheiles : ein anderer 

 Theil komrnt voni Proc. furcularis des Coracoids und der Scapula. 

 Beider Theile Sehnen inseriren sich vereinige clicht am Caput 

 hnmeri etwas proximal von der Sehne des Subscapularis " (Bronn's 

 Klassen des Tltier-Reichs, vi. Band, p. 239). Gadow agrees with 

 Owen in that the coraco-brachialis is missing in Struthio and small 

 in the Apteryx. 



He presents us with the following synonymy for it (loc. cit., 

 p. 238):- 



" 72a. M. SUBCORACOIDEUS. 



Soudavier interne. Yicq d'Azyr, p. 628. 

 Vorderer anziehender Armmuskel. Merrem, p. 153. 

 Ohne Namen. Meckel, System, p. 320, No. 13. 

 Coraco-brachialis superior. Scbb'pss, p. 115, No. 17. 

 Coraco-brachialis brevis. Milne-Edwards ; Selenka, p. 115, No. 41. 

 ,, ,, ,, De Man, p. 106 (2. Portion) ; Carlsson, 



p. 18. 



Coraco-brachialis. Owen, Apteryx,-^. 289 ; Watson, p. 84 ; Gurlt. 

 L'accessoire coracoidien du sous-scapulaire. Gervais et Alix, p. 23. 

 Coraco-brachialis externus. Fiirbrmger, Morph. Jahrb., v. 

 tiub-coraco-scapularis (Pars coracoidea) M. subcoracoideus. Fiir- 

 brmger, Morpli. Jahrb., xi., und Monographic." 



Authors appear to describe two portions of this muscle, of which 

 my coraco-brachialis is one ; Selenka says of his Coracobrachialis 

 brevis (No. 41) that " Die iilteren Beschreibungen dieses Muskels 

 sind sammtlich mangelhaft und verwirrt, viele sonst ausfiihrliche 

 Arbeiten nennen ihn nicht einmal. Cuvier spricht nur allgemein 



