138 COE 



vessels. Farther back these branches unite into about five to eight lon- 

 gitudinal canals on each side, which lie above the lateral blood lacunae 

 and do not join until they are near the efferent ducts. Here they unite 

 to form a rather large lacuna, as in C. cingulata^ from the dorsal wall 

 of which the efferent duct leads to the dorso-lateral aspect of the body. 



Nervous System and Sense Organs. — Brain and lateral nerves as 

 in other species. Cephalic nerves numerous and of large size. Me- 

 dian dorsal nerve small. Cerebral and lateral sense organs are less 

 well developed than in the other species described from the Pacific 

 coast. 



Habitat. — Rather common in 50-100 fathoms between San Pedro 

 and Catalina Island, Calif. The worms live among red algae, having 

 almost exactly the same color, so that they are not easily discovered 

 among the contents of the trawl. They are found associated with 

 Tceniosotna punnetti and exhibit a similar tenacity of life. 



3. CARINELLA CINGULATA sp. nov. 



pi. XIV, figs. 2-4. 



Body long, slender, subcylindrical, resembling C. superba in gen- 

 eral appearance, and not strikingly different from C. sexlineata and C. 

 capistrata., which are also found on the California coast. In general 

 color of body, as well as in being furnished with narrow longitudinal 

 and transverse white markings, there is considerable resemblance. 

 The markings on body, however, are arranged in a very characteristic 

 manner, and differ from those of any known species. 



The head is considerably broader than neck, rounded, truncate or 

 emarginate in front, flattened dorso-ventrally. It is marked off from 

 body by a distinct annular constriction. 



Body often shows constrictions in the annular white lines described 

 below. Proboscis pore subterminal. Mouth large, situated on the 

 constricted portion spoken of as the neck. 



Length 15 cm. or more ; width about 3-4 mm. 



Color. — General tone of body is deep brown, varying sometimes to 

 chocolate and sometimes to cinnamon brown. When filled with ripe 

 genital products the general effect of the intestinal region is only pale 

 brownish. Head much paler than body in color, with two narrow, 

 transverse, terminal, dark markings — one on either side of the tip of 

 the snout (p1. xiv, figs. 2—4). In certain states of contraction, these 

 markings almost meet just dorsally to the proboscis pore. 



On the neck is a darker brown transverse marking about one-fourth 

 as wide as diameter of body dorsally, but which becomes narrower 



