MK. P. E. BEDDARD ON THE 



[Nov. 26, 



the conditions obtaining in Rana gu]ipyi as a basis of comparison. 

 In using the same species for a comparison with Pipa I regret to 

 find that I have made an error as to Raim guppyi in a paper 

 communicated to this Society some twelve years since*. There 

 are six muscles visible (text-fig. 234) when i;he skin is removed 

 from the inside of the thigh. These are precisely as figured in 



A 



Thigh-muscles of Xenophrys monticola on inside of tliig-h. 



a. Vastus internus. h, e, d. Adductors, e, f. Savtorius or savt. and semitendinosus. 

 ff, h. Recti interni (or gracilis), i. Semimembranosus. 



Ecker's work upon the Frogt, except for the fact that in Rana 

 gapptji the adductor brevis lies between the heads of the sartorius 

 and the adductor magnus, instead of between the latter and the 

 rectus internus major, as figured in R. esculenta. When this is 



* P. Z. S. 1895, p. 837. 



t Engl. Traiisl. by Haslam, Oxford, 1889, p. 



tia-. 81. 



