Fig. 33. Horizontal section across the renculi of the left kidney of a Fin whale foetus 31 m. in length, 

 after injection with carmine. (Arteries red, veins shaded and urinary ducts dotted.) 



A. One lobe containing perhaps five or six lobules. B. Two lobes containing two lobules each. 



a. Arteries. d. Lateral veins. 



b. Main central veins. e. Superficial veins. 



c. Secondary urinary ducts. 



