304 SHOULDER-GIRDLE IN MONOTREMES, 



humeri caput fovepe profuntlissimte in ipsius facie posteriore pone 

 latissimi dorsi tendinem inseritur. Hie, ni fallor, aut teres minor, 

 aut, quod rectius duxerim, coraco-brachialis superior est." [Meckel's 

 figure, PI. V. 22, shows this muscle as the C. brachialis brevis.] 

 " Musculus alter, posterior, certo coraco-brachialis, longior, sed 

 tenuissimus, ex parte coracoidea extremo inferiore tendine angusto 

 ortus, ante summum latissimum decurrens, infra eundem ossis 

 brachii faciei anticse, pauUulum supra condylum flexorium jungitur. 

 [In PI. V. 25 this muscle is called coraco-brachialis inferior.] 



CuviER and Laurillard, in PI. 268, fig. 4, show part of the 

 coraco-brachialis (coraco-hurae^rien), while in PI. 266, tig. 2, the 

 coraco-brachialis is shown partially hidden by biceps, but no 

 reference number is given. 



Humphry says — " The deeper, post-axial, or suboccipital, 

 coraco-humerals arise from the coracoid beneath the biceps, as best 

 seen in Reptiles. They may be traced, in these animals, taking 

 origin from the under and hinder surface of the coracoid and 

 spreading upon the undersurface of the scapula, where a portion 

 of these forms the subscapularis. In Mammals this muscle is 

 quite segmented from the others. They are inserted into the 

 ulna edge of the humerus ; it is inserted into the ulnar tubercle. 

 The one next below the subscapular — the coraco-brachialis medius 

 — is generally present and is inserted into the middle of the shaft. 

 The passage through it of the external cutaneous, or musculo- 

 cutaneous, nerve indicates a tendency to division ; and in several 

 Mammals (Rabbit, Proboscis Monkey and Jerboa) the upper 

 segment is inserted separately into the ulnar tubercle, forming a 

 superior coraco-brachial. In Amphibians, Reptiles and Mono- 

 tremes there is commonly a third segment, an inferior coraco- 

 brachialis, which extends to the ulnar condyle ; and the brachial 

 artery, with the median nerve, passes between it and the middle 

 coraco-brachial." 



Westling says — "M. epicoraco-brachialis scheint mir in Bezug 

 auf Ursprung und Insertion mit Fiirbringer's M. subcoracoideus 

 (einem Theil des M. subcoraco-scapularis) bei Chama^loniden 

 Aehnlichkeit zu zeigen," and also " Die Saurier besitzen einen M. 



