368 



persist throughout its entire length but only in that portion of it which 

 is in front of the loop round the kidney. It has no direct connection 



■ with the renal-portal vein 

 on the same side but runs 

 straight along the inner 

 anterior border of the kidney 

 into the inter -renal vein. 

 Again we find, as in the 

 three preceding examples, 

 that the persistent posterior 

 cardinal vein runs forward 

 and receives the internal 

 jugular and sub -scapular 

 veins separately and that it is 

 continuous with the innomi- 

 nate which swells out into a 

 slight dilatation. The renal 

 portal vein on each side is 

 quite normally constituted and 

 breaks up into venae renales 

 advehentes. The two kidneys 

 do not differ in size to any 

 noticeable extent and the tri- 

 butaries of the inter -renal 

 vein are fairly symmetrical. 



Fig. 5. Diagram of Venous System of Spe- 

 cimen D. R.P. Right Posterior Cardinal, I.R. Inter- 

 renal. Other letters as before. 



Literature. 



1) Adami, J. Gr., On the Nature of glomerular Activity in the Kidney. 

 Journ. Physiol., Vol. 6, 1885. 



2) Bainbkidge, F. a., and Beddard, A. P., Secretion by the Renal 

 Tubules in the Frog. Biol. Chemical Journ., Vol. 1, 1906. 



3) Barcroft, J., and Brodie, T. G., The Gaseous Metabolism of the 

 Kidney. Journ. Physiol., Vol. 32, 1905. 



4) — , The Gaseous Metabolism of the Kidney. Journ. Physiol., Vol. 33, 

 1905. 



5) Beddard, A. P., Some Effects of the Ligature of the Renal Arteries 

 in the Frog. Journ. Physiol., Vol. 28, 1902. 



6) CuLLis, W. C, On Secretion in the Frog's Kidney. Journ. Physiol., 

 Vol. 34, 1906. 



7) GuRWiTSCH, A., Zur Physiologie und Morphologie der Nierentätigkeit. 

 Pflügbrs Arch., Bd. 91, 1902. 



I 



