BLOOD-VESSELS OF MUSTELUS ANTARCTICUS. 
723 
Fig. B. 
Diagram of the venous system of Mustelus antarcticus. 
The renal portal section of the system of tlie sub-intestinal vein is shaded transversely, the hepatic portal 
section longitudinally ; the system of the cardinal veins is dotted, that of the lateral veins is left 
unshaded; the cutaneous veins are represented by black lines. The liver ( Lr .), alimentary canal 
{Alim. C.), gonad ( Gon.), and kidneys ( Kd .) are represented by conventional outlines. For expla¬ 
nation of reference letters, see p. 726. 
4 Z 2 
