246 Prof. J. C. Galton on the Myology 



The outermost fibres of the ventral portion pass over the 

 outer aspect of the thigh, and are lost in the fascia covering 

 the outer side of the thigh and leg of either side, acting thus 

 as a tensor fasciae femoris externus (Cuvier, pi. 257. fig. 1, and 

 pi. 258). This arrangement keeps the thigh semiflexed upon 

 the abdomen. 



The uppermost fibres, "portion laterale" (Cuvier,pL 257.fig. 1, 

 and pi. 258), split near their termination into two flat bundles, 

 the innermost of which appears to become blended with the 

 inferior surface of those tibres of the pectoralis major which 

 take origin from the costal cartilages, while a few fibres seem 

 to be prolonged as far as the first or second rib. The outer- 

 most bundle joins a small slip given off" from that portion of 

 the latissimus dorsi (namely, from its innermost edge) which 

 furnishes the dorso-epitrochlien, which slip is continued into 

 the inferior surface of the terminal tendon of the pectoralis major. 



The portion answering to the platysma myoides is but poorly 

 developed. 



There is no trace of a musculus sternalis. 



The rectus abdominis is very well developed. As in Dasyj)us, 

 it broadens out on reaching the thorax, over which it was pro- 

 longed, terminating at ribs 2 to 6, inclusive, by digitations 

 corresponding to the point of origin of the obliquus externus 

 from these ribs. The highest fibres, which are continuous 

 with the inner edge of the muscle, are inserted into the second 

 rib by an extremely delicate tendon, easily overlooked. There 

 was no complete sheath for the muscle. The superficial sur- 

 face w^as covered by the aponeurosis of the internal oblique ; 

 while the deep surface was, on its outer half, invested with the 

 fibres of the transversalis, the inner half being covered by the 

 aponeurosis of the same muscle, which probably, along the 

 inner edge of the rectus, fused with that of the internal oblique 

 muscle. The outer edge of the rectus was not bounded by any 

 sheath. 



This muscle, according to Meckel (Archiv, p. 40) has three 

 " inscriptiones tendineffi " (Sehnenstreifen), the middle one 

 being the most conspicuous. Its thoracic attachment, accord- 

 ing to the same authority, is to the eight uppermost costal 

 cartilages. The tendinous bands were by no means clearly 

 marked in the specimen which I examined. 



There was a well-developed rectus thpracicus lateralis. It 

 aro^e from about the seventh to the eleventh ribs inclusive, 

 pastel over the boundary-line of the insertions of the sen-atus 

 magnus and the thoracic origin of the obliquus externus, and 

 was inserted into the second rib, at about the junction of the 

 costal with the sternal portion. 



