360 TRANSACTIONS OF THE [MAY 17, 



muscle as double in Perodicticus, Owen (8, p. 60) in Gheiromrjs 

 and Burmeister (6, p. 49) in Tarsius spectrum 



Allen (13, p. 43) merely states that in Tarsius fuscus the as- 

 sociation of Biceps and Coracobrachialis conforms to the pri- 

 mate type. 



C, M. Brachialis (anticus). 

 (PL XXXII., fig. 2 ; PI. XXXIII.) 



Arises from the whole lateral surface of the humerus, passing 

 as a very strong tendon cephalad as far as the distal border of 

 the lateral humeral tubercle, between the lateral humeral head 

 of the Triceps and the dorsal division of the Deltoid, whose in- 

 sertion is not embraced by the Brachialis. 



Insertion into the Coracoid process. 



D. M. Dorso-Epitrochlearis. 

 (PI. XXX.; PI. XXXI., fig. 1 ; PI. XXXII., fig. 2 ; PI. XXXIII.) 



Origin by two slips which embrace the caudal margin of the 

 Latissimus dorsi. Insertion into the mesal border of the Ole- 

 cranon and proximal fifth of the dorsal border of the shaft of the 

 ulna. 



Murie and Mivart (1, p. 32) describe the origin of the muscle 

 in L. catta as taking place from the " outer margin of the Latis- 

 simus dorsi near the insertion (1 e., just before it becomes ten- 

 dinous)." It broadens out into a thin muscular sheet, and be- 

 comes continuous with the fascia of the forearm between its two 

 insertions, which are into the inner condyle of the humerus and 

 the olecranon. 



Cuvier (H, PI. LXIX., fig. 1, t^) shows the muscle in L. va- 

 rius arising from the tendinous part of the Latissimus dorsi and 

 passing to the shaft of the ulna. 



It is present in the Galagos examined by Murie and Mivart 

 ("insertion into inner side of olecranon process "), in Tarsius 

 (Burmeister) and in Gheiromys (Owen). 



E. M. Epitrochleo-anconeus. 



Origin: 1. From the entire dorsal border of the supracondy- 

 lar arch, nearly meeting the insertion of the Coracobrachialis 

 inferior, which is attached to the margin of the supracondylar 

 foramen. 



2. From the medial condyle of the humerus. The fibres 

 converge to be inserted into the mesal margin of the Olecranon. 



The ulnar nerve passes beneath the muscle, between it and the 

 medial humeral head of the Triceps, the fibres of insertion of the 



