264 MR. ST. GEORGE MIVART ON [Apr. 22, 
Omo-hyoideus (fig. 6, O. H). This is a flat band of muscle 
which springs from the lower part of the anterior margin of the 
scapula, and, passing forwards, downwards, and inwards, loses itself 
in the lateral part of the sterno-hyoid, with which it coalesces. 
Deepest muscles of outside of right shoulder, the trapezius and subclavius 
being cut short to show the omo-hyoid. 
D. Deltoid. L.A. S. Levator anguli scapule. 0. H. Omo-hyoideus. 
S. Subclavius. TZ. Trapezius. 
Genioglossus. I have not succeeded in defining this muscle ; but, 
according to Dr. Fischer*, it is represented by some fibres which 
pass from the hinder surface of the mandibular symphysis to the 
skin of the mouth. This is not the genioglossus of Schmidt &c., 
which is my submentalist. 
APPENDICULAR MUSCLES. 
Precrorau Lis. 
Trapezius (figs. 1, 3,5, & 6, 7). This is a small subtriangular 
muscle which arises from the fascia outside the trunk-muscles, and 
immediately behind the levator arcuum and mylo-hyoideus externus. 
Passing downwards and slightly backwards, it is inserted into the 
angle between the scapula and the precoracoid (of Parker), but 
mainly into that side of the angle which is formed by the lower end 
of the anterior margin of the scapula. 
The Jatissimus dorsi (figs. 1, 3, & 5, L. D) is a small triangular 
muscle of about the same size as the trapezius. It arises from the 
fascia outside the dorsal muscles, and, passing downwards and for- 
wards, is partly inserted into the head of the humerns, and, partly 
fusing with the triceps, is continued on by that muscle to the proxi- 
mal end of the ulna. 
The pectoralis (fig. 2, P.1 & P.2) consists of two parts with a 
common insertion. The first and larger part springs from the sur- 
face of the superficial abdominal muscles ; the second portion from 
the sternum. They are inserted into the inner side of the radial 
(greater) tuberosity of the humerus. 
Serratus magnus (fig. 5, S. M). This very small muscle arises 
* Dc. p: 66. + Z.c. tabb. 6, 7. 
