866 MR. ST. GEORGE MIVART ON THE | Dee. 6, 




Deeper muscles of extensor aspect of right forearm, the extensores radiales 
longior and breyior being cut and reflected. 
B. Biceps. E4-E%, Extensores metacarporum. ZL. R. B. Extensor radialis bre- 
vior, E.R. LZ. Extensor radialis longior. #. U. Extensor ulnaris. Ff. U. 
Flexor ulnaris. M/, P. Extensor ossis metacarpi pollicis. P. @. Pronator 
quadratus. S.Z. Supinator longus, TZ. Triceps. 
Coraco-brachialis* (fig. 8, C.B). This muscle consists of two 
parts :-— 
1. The first of these, or shorter portion, is a broad muscle like that 
of the Iguana. It arises, by muscular fibres, from the whole outer sur- 
face of the coracoid. It is inserted into the radial tuberosity of the 
humerus, and into about the upper two-fifths of the shaft of that 
bone, ending below in a point which extends between the innermost 
origin of the brachialis anticus and the most antero-external origin 
of the external part of the triceps. 
2. The second, longer portion, arises by a strong but rather deli- 
cate tendon from the outer margin of the posterior end of the 
sternal groove of the coracoid. Long and slender, it passes down- 
ward, and is inserted, by muscular fibres, into the internal con- 
dyle. 
Triceps + (figs. 1, 8, 10, 11, & 13, 7, TI, T*). This muscle only 
consists of three parts; and the second and third of these are very 
closely united. 
* Meckel, /. c. p. 346. + Meckel, /. c. p. 365. 
