1907.] 



OF A FROG OF THE GENUS MEGALOPHKYS. 



333 



cartilaginous extremity of the transverse process of which it is 

 attached. A flat slip of muscle connects the third vertebra with 

 the second, and is exactly in the same straight line with the 

 muscle just described. It gives the impression of being a portion 

 of it although it is not actually connected. There is nothing 

 exactly comparable to this muscle in any of the genera of Batrachia 

 with which I shall presently deal, with the exception of the allied 

 Pelohates. I am inclined, however, to think that it may be the 

 homologue of the " musculus pulmonum proprius " of /*;};>«*, 

 which the enormous growth of the transversalis in Megalophrys 

 has cut off from communication with the aponeurosis of the lung 

 and diverted to the transverse processes of adjacent vertebra'. 

 But this is at present no nroi'e than a suggestion. 



Text-%. 94. 



oes ~ 



IL. liurib. 



L. Lunc 



Some of the dorsal muscles of Sana guppyi. 

 o.d. Oviduct. V. Vertebral centra. Other lettering as in text-tig. 93. 



A comparison between the muscles of Megalophrys which have 

 just been described and those of Rcina shows a great number of 

 difi'erences. In Megalophrys the Ilio-lumbar muscle complex is 



* Beddard, P. Z. S. 1895, p. 833, fig. 1 m. The transversalis sheet to the lung is 

 not shown in this figure, but is in that of Keith (J. Anat. Phys. xxxix. p. 257, 

 fig. 13 c). 



Peoc. Zool. Soc— 1907, No. XXIII. 23 



