THE URINARY SYSTEM: KIDNEYS 415 



been the smallest of the faces of the kidneys examined by these authors and the latero- 

 dorsal the largest — an arrangement similar to that described above. 



Fig. 22. Abdominal cavity of a female Fin whale foetus 1-73 m. in length, after removal of liver and 

 intestines, to show position and relations of the kidneys, (x J.) 



a. Oesophagus. g 2 . Right renal vein. 



b. Diaphragm. h 1 . Left renal artery. 

 c 1 . Left kidney. h 2 . Right renal artery. 

 c 2 . Right kidney. i. Left adrenal body. 



d. Dorsal aorta. /. Rectum (cut). 



e. Post-cava. k. Right ureter. 

 f 1 . Left post-caval trunk. /. Bladder. 



p. Right post-caval trunk. m. Serous sheet between the kidneys. 

 g 1 . Left renal vein. 



The coverings of the kidney 

 Daudt (1898, p. 278) described three coverings to the kidney, an outer connective 

 tissue serosa, which is a reflection of the peritoneum and forms a sac in which the organ 

 is slung, and an underlying capsula fibrosa, the true covering of the kidney. Beneath the 



