COE: NEMEKTEANS OF WEST AND NORTHWEST COASTS. 121 



on dorsal surface broaden out irregularly in intestinal region and 

 encroach so greatly on general brown ground color as to limit it to 

 a narrow median dorsal stripe and two other narrow brown stripes 

 on lateral margins. When sexual products are mature, brown color 

 of intestinal region becomes largely obscured, especially on ventral 

 surface, by pouches of nearly white reproductive elements. At other 

 seasons the white bands would doubtless appear narrower, and the 

 brown color of intestinal region would be more pronounced. 



Body divided transversely into unequal segments by a series of 

 narrow white rings, situated at irregular intervals fi-om head to pos- 

 terior end of the body, as in C. capistrata. Rings usually very nar- 

 row, but often conspicuous by being bordered, sometimes on both 

 sides, by fine brown rings which are continuous mth the general 

 ground color, but of a darker shade. Color of white markings ap- 

 pears as if apphed in small confluent spots and not homogeneously. 



Rings farthest apart anteriorly but fairly regular in position ; often 

 interrupted and wanting on the ventral surface. 



After preservation in formahn, the region between second and 

 third white rings is much darker in color, as commonly occurs in the 

 genus. Contrast in color very marked anteriorly, shading off grad- 

 ually behind. 



Proboscis. — Proboscis sheath extends only a short distance into 

 intestinal region ; rhynchocoel becoming sharply divided in vicinity 

 of nephridiopores into a smaller posterior cavity and an enlarged 

 anterior chamber. Latter continues ventrally for a few sections as 

 a blind sac beneath the smaller, dorsal cavity to which posterior end 

 of proboscis is attached, as in C. frenata. 



Cephalic glands fairly well developed around the rhynchodaeum, 

 extending back nearly to brain, and very conspicuous from their 

 deeply staining secretions. Condition is here intermediate between 

 that found in C. frenata, where these glands occur in integument 

 only, and C rubra, where they occur not only in the integument 

 and around the rhynchodaeum, but are thickly massed in the cephalic 

 musculature as well. 



Blood and nephridial systems. — Rhynchocoel vessels not found 

 in anterior fourth of esophageal region and extend for only a short 

 distance, exhibiting numerous connections with the lateral vessels 

 and terminating posteriorly in front of the nephridial system, 

 Nephridia of normal type for genus, with a main canal above lateral 



