6 PEOCEEDINGS OF THE NATIOITAL MUSEUM vol. 80 



8 mm. thereafter, but there was intimate connection with the inter- 

 muscular septum and the medial head of the triceps. It ended far 

 above the epicondyloid ridge, and the musculocutaneous nerve 

 crossed the brachium deep to all of it. 



M. hrachicdis. — This was in no degree separable into two parts 

 and was of the usual form, its origin embracing the deltoid. Me- 

 dially it arose from the humerus between a point a few millimeters 

 above the deltoid termination and 8 mm. above the entepicondylar 

 foramen. Laterally it extended some 5 mm. above the deltoid in- 

 sertion and distally as far as the lateral condyle. The insertion upon 

 the ulna was by a strong tendon. 



M. epitrochleo-anconeus. — This was possibly, though not certainly, 

 represented by a few fibers, which bridged the ulnar nerve. In the 

 second specimen it was absent. 



Galago sp. — U.S.N.M. No. 251756, male, with humeral length 

 of 33 mm. ; right side. 



M. biceps brachii, capita longum et breve. — The long head was as 

 usual. Over the proximal half of the brachium the short head of 

 the biceps and coracobrachialis medius, with common origin from 

 the coracoid, constituted a single, bipennated muscle, the two thence 

 continuing separately. Insertion of the short head was by means 

 of (1) a lacertus fibrosus superficially over the medial antibrachium ; 

 (2) an aponeurosis passing medially between the pronator teres and 

 flexor carpi radialis, this undoubtedly operating upon the ulna by 

 means of the intermuscular septum; and (3) a slender, tendinous 

 band passing from the lateral belly of the short biceps to the tendon 

 of the long head inserting upon the radius. 



M. coracobrachialis^ partes profunda et media. — The short, deep 

 head passed from the coracoid deep to the teres major insertion, the 

 latter being entirely fleshy and broader, both proximally and dis- 

 tally, than the latissimus insertion. The musculocutaneous nerve 

 crossed the humerus entirely deep to the media division, not imme- 

 diately adjoining its insertion, but quite far above it. Insertion was 

 upon an area of the humerus from the teres major tendon to the 

 level of the entepicondylar foramen. 



M. brachialis. — This muscle was not longitudinally separable, at 

 least with any clarity, as was the case with Tarsius. Otherwise it 

 was similar in both. 



M. epitrochleo-anconeus.- — Origin was from the entepicondyloid 

 ridge below the level of the foramen. It was smaller than in 

 Tarsius. 



Nycticebus sp. — U.S.N.M. No. 142235, male, with humeral length 

 of 54 mm. ; right side. 



