1907.] ANATOMY OF THE PELOBATIDiE. 881 



§ Lungs. 



The suspension of the lungs in Xenoplirys monticola is more 

 like what is found in Megcdophrys nasuta than in M. montana. 

 On the right side, the lung is attached to the liver by a membrane 

 which extends fully halfway down the lung and ends upon the 

 vena cava at its entry into the liver, being attached also of course 

 to the liver antei-iorly to this point. There is also a membrane 

 binding the lung to the dorsal median line and arising from the 

 lung in common with the pulmo-hepatic ligament. The cori'e- 

 sponding ligament on the left side of the body has a line of attach- 

 ment of the same length to the left lung. Leptobrachium hasseltii 

 agrees rather with Megaloplirys montana than with the other types. 

 For the pulmo-hepatic ligament of the right side is attached to a 

 point further back along the vena cava than in Xenopilirys, and 

 almost, if not quite, to the end of the lung. In Pelohates the 

 lung is attached by a well-developed pulmo-hepatic ligament, 

 which however is not longer than in Xenophrys. 



§ Uro-genital Organs. 



The kidneys both of Xenoplirys and LeptohrachivAn are smooth 

 glands very much like those of Rana. I emphasise this fact 

 because the kidneys of Megaloplirys nasuta., which I did not 

 describe in my account of the anatoni}^ of that Frog, are very 

 different in appearance from those of its allies. And, I may take 

 this opportunity of stating, the kidneys of Megaloj)hrys montana 

 are on the whole like those of its congener. In both these species 

 in fact the kidney is broken up into three or four large, almost 

 disconnected lobes, and the general appearance of the organ thei'e- 

 fore contrasts very much with that of the kidneys of Xenophrys 

 and Lep)tohrachium, which are flat and smooth with an even 

 surface. 



The Xenophrys which I studied was a fully adult male, that is 

 to say, the testes measured respectively 11-5 (right) and 9 (left) 

 mm. The right kidney possessed four vasa efferentia, forming no 

 rete ; two of them bifurcated before reaching the kidney. In an 

 adult Pelobates fuscus each testis had six vasa efferentia. It has 

 been recorded that the male Pelobates fuscus has no vesicula 

 seminalis. This structure is also absent from the ureter of 

 Xenophrys monticola. It is known that the fat-bodies vary con- 

 siderably in their degree of development in males of Rana. They 

 were very greatly developed in the male Pelobates just referred to. 

 In the Xenophrys., however, they were most feeble ; there were 

 only three digitations on the right side (and I think the same 

 number on the left) which were not attached to the anterior end of 

 the kidney, but to the membrane attaching it to the postcaval vein. 

 In Leptobrachiuin the genitalia were immature. The fat-bodies 

 had many digitations. The mesoarium was partly attached to the 

 dilated end of the oviduct, as I have described in Megalophrys 



