Anatomy of Aa.-ifnditui Amphibia. 237 



kidney a series of large short nephrostoinial funnels which open 

 immediately without branching into the main Regnal Veins. 



Tlie strenirth of the blood pressure in the kidney, as well aa 

 a corroboration of the connection of the funnels with the blood- 

 spaces, is shown in the fact that in two or three cases the red 

 corpuscles had been forced through the internal opening of 

 the neplu'ostome funnel, and were lying entangled among its 

 cilia. As may be inferred from this statement, the cavity in 

 many of these funnels is much greater than in some othea's 

 of the previous genera. Here, too, although the development 

 of nephrostomes is not so great as in Notadeu bennetti, the 

 association of intense vascularity of the kidney with aestivation 

 is very evident. 



Heleioporits piciiis. 



Here also the kidneys are almost oval in transverse section. 

 The Ureter and Renal Portal Vein lie on the dorsal surface, 

 near but not at the outer edge. Heleioporus pictus is another 

 of the burrowing aestivating forms, and, as in Notaden bennetti 

 and Chiroleptes alboguttatus, we have here a very vascular kidney 

 somewhat resembling Notaden in type, but much less developed. 

 As in those forms also, the connective tiss.ue is verj" small in 

 amount, and the blood-spaces are so crammed full of corpuscles 

 that no definite walls are often to be found. The regular dorsal- 

 ventral arrangement of the kidney is interfered with somewhat 

 by the greater convolution of the glandular part of the kidney 

 tubules. The glomeruli are spherical and much more numerous 

 than in the last two forms. The neck of the tubule opens dor- 

 sally from the Malpighiau body, while the blood vessels enter 

 and leave the outer side of the glomerulus [see- Text figure and 

 PI. XXI., fig. \\. The nephrostomes are not as numerous as in the 

 last numbering in each kidney 105. They ai-e almost entirely 

 absent at the anterior end, gradually increasing in number to 

 the beginning of the posterior one-third of the length of the 

 kidney, and then diminishing very rapidly to the posterior end. 

 They have been found to open some into the general venous 

 blood-spaces of the kidney, wliere their cilia may be seen pro- 

 truding inwards and surrounded by blood corpuscles: others 

 lying on either side of the main branches of the Renal Veins 



