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MYOLOGY OF CHLAMYDOSAURUS KINGII, 



Epicoracohumeralis. — From the bifurcation of the epicoracoid 

 from the fenestra, and from the adjacent edge of the coracohumeral ; 

 — inserted into the apex of the radial tuberosity between the deltoid 

 and pectoralis major. 



Infraspinatus. — From the spinous process of the scapula : by a 

 distinct slip from the upper spur of the epicoracoid and from the 

 membrane between them — the combined body also derives origin, 

 but rather scantily, from the subjacent bone nearly to the gleuoid 

 cavity. Passing between the two long heads of the triceps and its 

 external humeral origin, and beneath the ligamentous strap con- 

 necting the second long head of the triceps with the head of the 

 humerus, it is inserted between the humeral heads of the triceps. 



Triceps (Plate xiv., fig. 3, and Plate xv., fig. 4 — t.) — 1st. Ex- 

 ternal long head, from the posterior edge of the base of the scapula 

 (fig. 4-T. 1.) 



2nd. Internal long head, on the left side rises from the same 

 spot ventrad of the external : on the right side rises from the 

 articular ligament. This head receives a long slender tendon from 

 the ligamentous arch beneath the subscapularis. (fig 4 — T. 2.) 



3rd. External humeral, from the whole posteroexternal surface 

 of the humerus ; — externally communicating with the 



4th. Internal humeral, from the internal surface of the humerus 

 as far as the head. 



The common insertion is into the patelloid ossicle and summit of 

 the ulna. 



Brachialis anticus (fig. 3 & 4 — b. a.) — From beneath the radial 

 tuberosity and downwards ; — at less than two-thirds of the length 

 of the bone it blends indissolubly with the biceps. 



Biceps (Plate xiv., fig. 3, and Plate xv., fig. 4 — b.) — 1st. Head 

 rises — by a broad tendon (without any interruption) from the 

 anterior sternal margin of the coracoid. 



2nd. Head — rises by a fleshy belly from the lower epicoracoid 

 spur and edge of the fenestra ; — at about half its independent 

 course this belly becomes a tendon, and again becomes fleshy before 

 joining the first head. Inserted in common with the Brachialis 

 anticus into which it quickly merges. 



