104 Journal of the Asiatic Sociely of Bengal. |N.S , XVIII, 
a uniform plan, viz. a system of tubules each supplied a 
branches from the efferent glomerular artery, and = Pp -“ 
would hardly undergo such a SoS ar eo egrenen ie ple: 
i i + tubu vapil- 
tion in certain groups as the filling o the 
pints with a veliiiie of venous blood three times the — of 
the arterial; (b) purely venous blood invading the intertubu- 

CURRENT THEORY ACTUAL CONSTRUCTION 
TEXT-FIG 2. Diagrams illustrating the current theory (A) and the 
actual constraction (B) of the Amphibian kidney. In h 
capillary plexus (ICP) is shown to 
from the renal venous meshwork (RVM 
te 
tubular plexus would naturally open. , : 
DA, dorsal aorta; CP, inter-tubular capillary plexus; G, gome 
LPV, left pelvic vein; PCV, Ppost-caval vein; RRAV. right renal afferen 
vein; RVM, renal venous meshwork. 
lar plexus as a consequence of the cutting-off of the arterial 
blood flow and of raised osmotic pressure due to diuretics (as 
in Schmidt’s and Beddard’s experiments—vide 36, 8) is delete- 
rious to the tubule epithelium, causing the cells to degenerate, 
and though the venous blood! is supposed to be diluted with 


' As 1 have already pointed out, Cushny (7) colors the blood in ne 
“* renal portal ” vein of his figure 14a bright scarlet and purple in his. 

