

FIG. 1 09. Nereis dumerilii. Semi-diagrammatic view of the anterior portion of 

 the body, with the dorsal body-wall removed, so as to show the alimentary canal, 

 the septa, the blood-vessels and the nephridia; a portion of the intestine removed 

 so as to show the ventral blood-vessel and nerve-cord which lie below, dors, vess, 

 dorsal vessel; gl, cesophageal glands; int, beginning of intestine; ne. co, nerve 

 cord; neph, nephridia; ass, oesophagus; palp, palp; para, parapodia; perist, 

 peristome; perist. tent, peristomial tentacles; /*, pharynx with its jaws; freest* 

 prostomium; vent, vess, ventral vessel. 



I 9 2 



