242 (jf'oiy/'iKf Sivecl : 



nearly the full lenoth of the kidney, and that on the other 

 only half that length. The path followed by the sperm on its 

 wa,y to the exterior is more clearly seen here than in any other 

 form examined by me, as not only were the testes very larg*; 

 and well developed, but the >perm could be traced right through 

 the kidney to the ureter. 



The Vasa efferentia leaving the testis run dorsally, forming a 

 netwiirk in the mesorchium, to open into a longitudinal Bid- 

 der's canal. Both network and canal are continued posteriorly 

 and also anteriorly to the plane of the testis. The canal lies 

 further from the middle line than the Renal Arteries, and both 

 are nearer the middle line than the Renal Veins. From the 

 ampullae on this canal ducts pass both dorsally a.nd laterally, 

 dividing up greatly — one ventral branch runs ventrally 

 towards the outer edge of the kidney forming the ventral 

 transverse canal, as seen in the Text-figure. The branches of 

 these canals open into the ventral part of the Maliiighian Cap- 

 sules. In many cases, thi- Bowman's capsule is greatly distended 

 by the masses of sperm [See PI. XXI., tig. 5J, the glomerulus being 

 pushed quite to one side. All the Malpighian bodies are not 

 so ciinnected with the sperm ducts, and there i.- certainly a 

 relationship between the position of the Malpighian body and 

 its connection or otherwise with the sperm duct^^. Thus no 

 sperm is to be found in the Malpighian bodies occupying the 

 outer one-third of the width of the kidney eve-n when sperm is 

 pre.-ent in the tubules near by. One is apt to be misled as to 

 the existence of such connection, since it does not follow 

 invariably that even when the sperm ducts, and the uriniferous 

 tubules are both full of sperm, that any will be found in the 

 Bowman's capsule to and from which they are clearly open. 

 Nevertheless, I have not been al)le to Hnd any sperm ducts 

 opening into the Capsules along the miter edge of either kidney 

 (Cf. previous forms, e.g., Hyla aurca, amd Notaden bennetti). 

 From the Malpighian bodies, the sperm passes by the ordinary 

 ui-iiiifcrous tubules into the tran>vers© collecting tubes whii'h 

 run outwards parallel with the dorsal surface o\' the kidney to 

 pass their contents into the ureter where tlie sperm may be 

 seen in ureat numbers. 



