The Muscles 105 



This muscle springs as a tendon from the hinder 

 border of the scapula directly beneath the articular 

 cavity, and extends back, between the scapulo- 

 humeralis profundus and the dorsalis scapulae 

 muscles, into the muscle belly. 



(b) Caput coraco-scapulare (Plate I., Figs. 2, 4, 5, 

 6, acs) (Externum caput m. tricipitis, Innerer 

 langer Kopf des dreikopfigen Streckers, Portion 

 scapulaire interne du triceps-brachial, Zweiter 

 langer Kopf des Triceps, [Erster] abducirender vom 

 Schultergeriist entstehender Kopf des Streck- 

 muskels des Vorderarmes, Triceps Nr. 2, Triceps 

 longus secundus). Arises by two distinct tendi- 

 nous tips the upper, weaker one from the hinder 

 border of the scapula, the lower, broader one from 

 the hinder border of the coracoid. 



(c) Caput Humeri Laterale (Plate I., Figs. I and 

 4, ahl) (Brevius caput m. brachiei interni, [Aeus- 

 serer] kurzer Kopf des dreikopfigen Streckers, Por- 

 tion humeral externe du triceps brachial. Aeusserer 

 vom Humerus ausgehender Kopf des Streck- 

 muskels des Vorderarmes, Theil des Triceps Nr. 

 3, Triceps externum). Springs from the lateral 

 part of the extensor surface of the humerus dorsal 

 to the lateral process and the origins of the humero- 

 radialis and brachialis superior. 



(d) Caput Humemle Posticum (Plate I., Fig. 4, 

 ahp) (Longissimum caput m. brachiei internum, 

 Theil des inneren [kurzen] Kopfes des dreikopfigen 

 Streckers, Theil des Triceps Nr. 3, Theil des 



