1897.] MYOLOGY or THE TERRESTRIAL CARWITOBA. 393 



(69, 70) the muscle was also absent, as was the case in Mustela 

 jmtorius. In 3Ieles (71, 72) the coraco-braehialis is a single muscle 

 and is inserted into the middle third of the humerus, ventral to 

 the insertion of the latissimus dorsi. Unfortunately no mention 

 is made of the relation of the muscle to the musculo-eutaneous 

 nerve, but it looks very much like the only instance of a coraco- 

 braehialis medius which we have met with in Carnivora. 



Brachialis antlcus. — In its typical arrangement this muscle seems 

 to consist of two parts: (1) a long head rising from the back of 

 the sm'gical neck of the humerus and winding round the outer side 

 of that bone to reach the frout, forming in its passage the 

 musculo-spiral groove ; (2) a short head rising from the anterior 

 border of the lower half of the humerus. These two heads are 

 inserted together into the coronoid process of the ulna. In the 

 Carnivora the long head is always present and is most constant in 

 its attachments, while the short head we have not met with at all. 

 We believe that the proper nerve-supply of the long head is the 

 musculo-spiral and that of the short head the musculo-eutaneous ; 

 in two or three Carnivora, in which we have carefully looked for 

 this point, we have oidy found a branch from the musculo-spiral, 

 but further observation is necessary before a definite statement 

 can be made. 



Triceps. — This muscle shows a good deal of variation in the 

 number of bundles into which the humeral portion is divided, 

 though we are not inclined to regard these divisions as of any 

 classificatory importance ; as an example of this we may quote the 

 case of the liacoon, of which we have three records. In the first 

 of these (5ii) we were able with great ease to distinguish five 

 heads, the external of human anatomy being double, while the part 

 of the internal head which rose from the bridge of bone over the 

 supracondylar foramen was separate. On comparing this with 

 Allen's description (XXVI.) we find only four heads mentioned, 

 the one from the supracondylar bridge not being distinct. In 

 Procyon cancrivorus (57) only the three heads described in Man 

 were noticed. The middle or long head, with one exception, is 

 quite constant and usually rises from the glenoid half of the 

 axillary border of the scapula. Among the Felidae there are 

 altogether five heads in F. catus (6). In the Viverridse, Orypto- 

 procta is described as having four heads by Beddard (VII.), but in 

 our own specimen we noticed an extra scapular head rising from 

 the dorsal part of the scapular spine and from the fascia over the 

 infraspinatus. In Viverra civetta (13) and Uerpestes (24) four 

 heads were seen, in two specimens of Genetta five (16) and four 

 (18) respectively. In Proteles (25) Watson found five heads, one 

 coming from the spine of the scapula and probably corresponding to 

 the spinous head in Cryptoprocta. Among the Hyasnidce only three 

 beads were seen in H. striata (26), but in H. crocuta (29) there were 

 four, the external head being double. Among the Canida;, we found 

 five heads in C. familiaris (31), the long head being double (see 

 fig. 8, p. 390) ; the same arrangement is figured by Cuvier and 



Proc. Zool. Soc— 1897, No. XXVI. 26 



