1 8 DESCRIPTIONS OF PREPARATIONS. 



outer side of each of these depressor muscles the panniculus carnosus, x, x , 

 x", takes a fixed insertion by a band of muscular fibres, which on the right 

 side are cut short, and on the left are seen to be continuous with the rest of 

 the muscle. In the interval between this strip of muscle and another which 

 passes from the platysma to distribute itself in the region of the mouth, the 

 buccinator muscle, j/, comes into view. The lobes of a somewhat variable 

 buccal gland have been removed to show these three muscles in this 

 region. 



The tendon of the stylo-hyoid forms an oblique angle with its mus- 

 cular belly, s, being connected with the greater cornu of the hyoid, along 

 which it passes to be attached to the body of the bone, /. To the muscular 

 part of the stylo-hyoid two nerves, from the portio dura of the seventh pair 

 with which the glosso-pharyngeal portion of the eighth pair of cranial 

 nerves is connected, may be seen in dissection under a lens, though 

 not in this figure, to distribute themselves. A semilunar space has been 

 formed in the right axilla, between 8 and y, by separating the latis- 

 simus dorsi, y, as it narrows up to its insertion on the inner side of 

 the humerus, from the similarly narrowing panniculus carnosus, 8, of the 

 regions of the flanks and back, the ' dermo-humerien ' of Cuvier (Anat. 

 Comp. iii. p. 597), the ' costo-alaris ' of Humphry (Observations in My- 

 ology, p. 131), which passes in front of it to be inserted into the humerus 

 together with the tendon of the pectoralis major. The insertion of the 

 homologous muscle in Birds is shown in the figure of the Dissection of the 

 Pigeon in the shape of a tendinous slip attached to the tendon of the great 

 depressor pectoral muscle, x. From the tendon * of the latissimus dor si of 

 the left side a slip of muscle, e, the ' latissimo-condyloidetis ' of Bischoff 1 , 

 the ' dorso-epitrochlien ' of Duvernoy (Archiv. du Museum, viii. p. 80), is seen 

 to take origin and pass down at right angles to that tendon to an insertion 

 on the inner side of the olecranic process of the ulna. On either side and 

 behind the latissimo-condyloideus are to be seen the three heads of the 

 triceps, with which muscle the latissimo-condyloidetts is frequently fused. 

 Externally and anteriorly is seen the biceps, 0, here, like the similarly 

 misnamed digastric, but a monogastric muscle. From its anterior surface, 

 one band of fascia passes off to connect itself with the fascia enveloping the 

 muscles of the fore-arm, another leaves the tendon of the muscle at a lower 

 level and connects itself with the radius and the tendon of the pronator 

 radii teres, thereby setting up a secondary connection with the radius with 

 which it is principally connected in man, whilst its principal insertion is 

 made into a well-marked depression just above the inner and inferior edge 

 of the olecranic process of the ulna by a broad and flat tendon. The 



1 Bischoff gave this muscle the convenient name of latissimo-condyloideus, and was followed 

 by Dr. H. C. Chapman, in his Memoir on the Structure of the Gorilla, Proc. Acad. Sci. Phila- 

 delphia, 1878. 



