120 bulletin: museum of comparative zoology. 



canals, situated above lateral blood lacunae ; all these unite at poste- 

 rior ends to form a rather large lacuna on each side, from dorsal wall 

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



Sense organs. — Cerebral and lateral sense organs less highly spe- 

 ciaUzed than in any of the other species of the genus described fr'om 

 the Pacific coast. 



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

 Pedro and Catahna Island, California. The worms live among i-ed 

 algae, with which they agree so perfectly in color that they are not 

 easily discovered among the contents of the trawl. They are found 

 associated with Taeniosoma punnetti., and exhibit a similar tenacity 

 of life, being able to live for a day or more among damp seaweeds. 



6. Carinella cingulata Coe. 

 Harriman Alaska Expedition, 11, p. 138, PL 14, figs. 2-4, 1904. 



This species is at present known only from Monterey Bay, Cali- 

 fornia. It resembles C. sexlineata and C capistrata, which are also 

 found on the Cahfornia coast, in shape of body and general appear- 

 ance, and has a similar coloration. The markings on body, how- 

 ever, are arranged in a very characteristic manner and differ from 

 those of any known species. 



Head considerably broader than neck, rounded, truncate or emargi- 

 nate in front, flattened dorso-ventrally, marked off from body by a 

 distinct annular constriction ; body often constricted in the annular 

 white lines described below. 



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



Color. — General tone of body deep brown, chocolate, or cinnamon 

 brown ; pale brownish posteriorly when filled with ripe genital prod- 

 ucts. Head paler than body, with a narrow, transverse, dark marking 

 on each side of tip of snovit. A darker brown transverse marking 

 about one fourth as wide as diameter of body forms an incomplete 

 ring in the mouth region. Four longitudinal white bands extend 

 with more or less distinctness throughout the length of the body. 

 Two of these are situated symmetrically near the lateral margins 

 of body, the other two dividing the dorsal surface into three equal 

 parts. Lines all terminate anteriorly in the first white ring, which 

 is situated immediatelv behind the dark nuchal band. White bands 



