358 TRANSACTIONS OF TUE [maY 17, 



Perodicticus ? 



Ta?^sius ? 



Cheiromys. 

 Mm. Glenoradialis-(-Coracoradialis-(-Coracoulnaris : 



Lemur bruneus. 



Lemur niger. 

 Mm. Glenoradialis-1-Glenoulxaris-|-Coracoulnaris. 



Galago crassicaudafus. 



Galago garnettii. 



Galago allenii. 



There is evidently considerable variation in respect to the de- 

 velopment of the ulnar segment of the insertion of the muscle 

 represented b^^ the semilunar fascia. 



As above stated, this fascia is strongly developed in L. bruneus, 

 Murie and Mivart do not mention it in L. cafta, or the other 

 Lemurs examined, except to imply its presence in L. niger. 



In Cheiromys the}' distinctl}'^ state that it does not exist. 



B. M. Coracobrachialis. 

 (PL XXX., fig. 2 ; PL XXXI.; PL XXXII., fig. 1.) 



Origin: Combined with coracoid head of Biceps from the 

 tip and ventral part of the medial margin of the Coracoid pro- 

 cess, the origin of the latter fibres being almost directl}' muscu- 

 lar, whereas the portion arising in common with the short 

 bicipital head from the tip of the Coracoid is invested by a dense 

 aponeurotic lamella as far as the junction of the proximal and 

 middle third of the arm. 



The muscle is perforated by the musculo-cutaneous nerve, at 

 about the middle of the main division. Immediately upon 

 emerging from the Coracobrachialis the nerve gives off a large 

 branch to the Biceps. 



Insertion : The Coracobrachialis is inserted in three distinct 

 divisions : 



1. Coracobrachialis superior: Separates from the niesal and 

 ental portion of the muscle just beyond the caudal border of the 

 Subscapularis tendon. 



It passes to the proximal part of the mesal surface of the 

 shaft of the humerus between the tendon of the Subscapularis 

 cephalad and the Teres major caudad, ventrad to the proximal 

 portion of the mesal huaieral head of the Triceps. 



2. Coracobrachialis medius forms the largest division of the 

 muscle. It separates from the coracoid head of the Biceps near 

 the caudal border of the Teres major tendon, and is inserted 

 distad of that tendon into the mesal ridge of the humeral shaft, 



