110 Journal of the Asiatic Society of Bengal. [N.S., XVIII, 
when compared with samples of urine obtained from control 
toads (with kidneys retaining their venous supply). These facts 
once more prove that the venous supply of the‘ portal” kidneys 
is of no consequence in connection with urine secretion 
From the Toads A, B, C, F, Hand J, I carefully removed the 
renal arteries and compared them (average diameter) with the 
arteries of twelve of the normal control toads. The conclusion 
J arrived at from these few data was that the renal arteries of 
the toads deprived of a venous supply to the kidneys are not so 
large, relatively to the body-weight, as the arteries of many 

RLNPRAY ..- ---LLNPRAYV 

v 4 D 
_  TExt-FicurE 4 (x 2). The two persistent posterior cardinal veins 
in the male Rana temporaria labelled OD contest tapect: Sig sal 
— RLNPRAV, right large non-portal enal afferent vein 
i PRAY, left ditto. The small size of the right ; kidney is noticeable. 
External diameter of the a ‘‘ renal afferent’’ vein (posterior to the 
kidneys was 0°883 mm. an the portion ae to the ki iaday 1033 
mm. The external diameter of the — ‘‘renal afferent’’ vein was 0°930 
and a Mes Sere _ the kidney 1:085 m The external diameter of 
ihe Pepisine abdominal vein was 0-775 mm. The left kidney (with the 
oR = renal afferent” vein) weighed 0:072 gm., and the right kidney 
t 3 * i i 
= 
—a 
Spas gms.) was 149°8, whereas the kidn ney ratios of six norm al m 
temporaria were 147-7, 121-9, 137°4, 138-5, 195° 4 and 163°3—the duet 
therefore were not larger than usual. 
normal toads, but are perhaps slightly larger than those of the 
average normal toad. I arrived at a similar conclusion from 
the measurement of the tat arteries of an abnormal specimen 
of Rana temporaria (which I labelled OD,! text-figure 4), both 
kidneys of which were naturally devoid ot a venous supply ow- 
ing to both renal afferent veins (persistent posterior cardinals) 
maintaining a direct connection with the two pre-caval veins, 
! I am indebted for ss rar 
O’Donoghue who sent it to e specimen to the kindness of Dr. C. H.- 

