Desceiption" of Plate 11. 



Vascular System of Nedurus maculatus. 



The venous system of Nedurus maculatus. The diagram is 

 made from a ventral dissection. The liver has been turned over 

 as far to the right as possible. The left arm and hand and the 

 right leg and foot are shown. A few of the small veins and one 

 of the large hepatic veins have been omitted for the sake of clear- 

 ness. 



♦The single star in the upper part of the diagram indicates the position of the pul- 

 monary vein in the Sinus Veyiosus, The two stars in the lower part of the diagram 

 indicate the cut pelvic vein, made necessary by the reflection to the right of the liver. 



