BY DENE B. FRY. 781 



the pectoralis sternalis (psa.), and arises from the epicoracoidal 

 arc, but is separated from its fellow in the middle line. The 

 portio posterior (psp.) arises on the anterior half of the sternum 

 and from the ligament binding the overlapping epicoracoids. It 

 hides from view the coraco-brachialis brevis interior, and the 

 coraco-brachialis longus, as the pars epicoracoidalis also hides 

 the coraco-radialis. 



Tn K. j)ulchra, the arrangement is much the same as in L. 

 dorsalis, with the exception of a few details of origin, insertion, 

 and relative position The pars epicoracoidalis (Plate Iv., fig.l, 

 pfi.) is hardly distinguishable from the pars sternalis. The 

 median division, or po tio anterior m. pectoralis stertialis (Plate 

 Iv., fig. l,;;sa.) is even less distijict than in L. dorsalis. The most 

 posterior fibres of this muscle attach to the sternum, but the 

 others arise along the epicoracoid, as also do those of the pars epi- 

 coracoidalis. The portio posterior (psp.) is relatively weak, and its 

 fibres originate wholly from the sternum. As before mentioned, 

 it is almost hidden from view by the portio internus m. pecto- 

 ralis abdominalis Its fibres arise a little to one side of the 

 middle line, showing those of the pectoralis abdominalis of each 

 side to be in contact along their line of origin. 



I have been unable to find a coraco-radialis, like that of Rana 

 esculetita, in A. pansa. In L. dorsalis, there is a muscle, which I 

 take to be the coraco-radialis proprins of Hoffmann* (Plate Iv., 

 fig. 3, pr.). It underlies the pars epicoracoidalis and portio 

 anterior of the pectoralis sternalis, and, by those muscles, is 

 hidden completely from view, as is mentioned by Dr. Beddardf 

 in the case of Megalophi'ys nasuta. It arises on the epicoracoid 

 arc, and its fibres havt^ much the same angle as those of the more 

 superficial pectoralis. In K. pulchra, there is an obscure band 

 of muscle (Plate Iv., fig.l, pn.) which is analogous to the coraco- 

 radialis of L. dorsalis. As in that species, it is hidden from 

 view by the pars epicoracoidalis, and partly also by the anterior 

 portion of the pars sternalis. In Metopostira ocellata, a frog 



* Hoffinann, loc. cit., p. 135, Taf. xvii., crp. 

 tBeddard, lot: cit., 1907, p. 337. 



