1867.] Mr. J. Wood on Variations in Human Myology. 525 



latissimus gave attachment to a strong, thick muscular slip, which, pas- 

 sing separately down the upper fourth of the arm, finally joined to long 

 head of the triceps, presenting the most ^ 

 marked approximation (especially in the 



last subject) to the Dorso-ej^itroclilear _ . 



muscle in the Orang and other Simiadee 

 which the author has hitherto found in 

 the human subject. Both the subjects 

 were males, presenting respectively 16 

 and 11 muscular variations. 



7, JBiceps. — Pive variations were pre- 

 sented by the origins of this muscle. Two, 

 one male and one female (Nos. 7 & 24), 

 showed on the left side the more common 

 third head, arising from the humerus be- 

 tween the coraco-brachialis and brachialis 

 anticus. This was also present in the 

 right arm of another male (JSTo. 27). On 

 the right arm of No. 7, and the left of 

 'No. 27, the third head arose as a detached 

 slip from the coracoid process, and, in 

 one, from the capsular ligament also, form- 

 ing a fusiform belly which joined the ten- 

 don of insertion separately at the part 

 which gives off the semilunar fascia. In 

 two others, both males (Nos. 8 &13), the 

 varieties were found connected with the 

 insertions of the muscle. In the first it 

 was found in the left arm only, and pre- 

 sented a most complicated arrangement 

 (fig. 4). The origin of the muscle was 

 normal. Just below the junction of the 

 two heads, about the middle of the upper 

 arm, the muscle divided into three fusi- 

 form bellies. The outer, which is largest 

 (a), presents the normal insertions into 

 the radius and semilunar fascia (cut atZ*), 

 The middle one (c), the smallest, ends in a f il Mil 



small rounded tendon, which, passing ob- 

 liquely down and inwards between the 

 semilunar fascia and the radial insertion, 

 becomes lost on the supinator fascia and 

 the hursa of the radial tuberosity {d). 

 The inner division (e), constituting the larger of the abnormal bellies, 

 ends in a strong tendon which, at the elbow, divides into three slips, the 



