1895.] 



WTJSCULAU ANATOMY OF XENOPUS. 



843 



2 of my paper upoa Pipa ^ But it has a different origin. The 

 accompanying drawing (fig. 1) illustrates the muscle in question 

 with various adjacent structures, gl. is a large muscle which I 

 describe later as the "glutceus" though it may represent the 

 glutceus and a ^^^''c^ magnus — the ^^ psoas" of my subsequent 

 description (not visible in the present drawing) being in that case 

 a psoas minor. Not far from the anterior end of this glutceus there 

 arises between its two heads (dorsal and ventral) a stoutish flat 

 muscle (m.p.) of a coarse texture from the edge of the ilium. I was 

 at first disposed to suspect that this muscle dipping down between 

 the two, thus separating portions of the glutceus, might run parallel 

 with them, but hidden from sight, to be inserted on to the femur. 

 But a careful dissection showed that this was not the case. Some 

 of the fibres of this muscle are attached to the lung in front, 

 others passing round behind it ; others again accompanying these, 

 pass round behind the lung and traversing the hgatnentum 

 latum are inserted upon the oesophagus (woodcut fig. 2), The 

 main mass of the muscle, however, traverses the floor of the 

 chamber already spoken of as underlying the stomach, and is 

 inserted on to the oesophagus and on to a fibrous aponeurosis 

 lying behind the lung. 



Eig. 2. 



Lung, Gesophagus, and related musculature in Xenoptis. 

 L, lung; (Es., oesophagus. 



(2) The obliquus internus, as in Bana and in Pi2Ja (see above, 

 p. 831, fig. 2), enters into the formation of the diaphragm; a 

 few muscular slips (fig. 1, a) are given off, which are attached to the 

 base of the lung, traversing the mesentery already spoken of which 

 connects the lung with the parietes. A large portion of the muscle, 



^ Loc, cit. 



