238 Georghia Siveef : 



may open directly into thein. The funnels are large and long 

 [see PL XXI., tig. 4], and in the case of the former, which are 

 branching forms, after entering the kidney obliquely they run 

 horizontally for some distance and then branch, their branches 

 running along the trabeculae far into the ventral half of the 

 kidney thickness. These branching form.s of nei>hrostominaI 

 tubules resemble those of Hyla aurea, and Chiroleptes albogut- 

 tatus, rather than the more strongly defined type found in 

 Notaden. I have examined specimens from Centrail Australia 

 and from Victoria, and find very little difference in the kidneys 

 of the forms from the two areas. 



Liinnodynastes dorsalis. 



The kidneys ai-e here much fiattened ventrally and convex 

 dorsally, the adrenal body forming in transverse section- a con- 

 spicuous structure along the middle of the kidney. In general 

 the internal structure is very similar to that found in Hyla 

 a.urea, the connective tissue being considerable in amount 

 [see Plate XXI, fig. 3], and the blood-spaces small and 

 empty and well-defined compared with those of the last three 

 forms^ — the glomeruli are r(unid and fairly numerous. The 

 nephrostome funnels are short and unbranched and somewhat 

 larger than in Rana catesbiana (.035 mm. in diameter ac- 

 cording to Farrington ["93, p. 310]), while those of Limno- 

 dynastes dorsalis are .037 to .04 mm. They have a well- 

 marked cavity, their internal ends projecting into the bloud- 

 spacas [PI. XXL, tig. 3] among the corpuscles when these are pre- 

 sent. I have not detected ainy funnel>* opening into the main 

 branches of the Renal Veins as in some forms previou>ly de- 

 scribed herein. In specimens injected from the Renal Portal 

 Veins under pressure, the carmine was found to be present 

 throughout the blood-spaces, and had been forced out by the 

 prei^sure into the funnels where the particles were found en- 

 tangled among the cilia. 



B. — TiiK Connection of thk \'asa kkkkhknti.a wnii tiik 



TvlDNKV. 



Here, as in Part A, the object in view is to find a sequence of 

 forms in this case illustrating the ma.nner in which in the course 

 of the evolution of the group, the male reproductive ducts have 



