270 BCJLLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



which open into a central lumen connected with the ciliated canal. 

 The tangle of ne])hridial tubules which lies closely about the poste- 

 rior ends of the cerebral sense organs is described above. 



Meproductice organs. — Several of the specimens sectioned were 

 collected near the end of June, and in these the genital products 

 were fully mature. The spermaries were arranged with great regu- 

 larity, there being usually two glands on each side between each pair 

 of intestinal lobes. These two spermaries were situated one above 

 the other, but the ducts of l)oth opened to the surface of the body 

 above the lateral nerves. In some cases the ducts were fully formed 

 and were distended with spermatozoa. The ovaries were similarly 

 arranged, although a single ovai-y often HUed the whole space 

 between two neighboring intestinal lobes. 



Habitat. — Dredged by the Albatross in the following localities : 



Lat. 55° 16' N., Long. 163° 52' W. (Sta. 3265). Bering Sea, in 

 38 fms., black sand. 



Lat. 54° 26' N., Long. 165° 32' W. (Sta. 3223). Bering Sea, in 

 56 fms., broken pebbles. 



Lat. 48° 13' N., Long. 123° 11' W. (Sta. 3443). Off Washing- 

 ton, in 97 fms., green mud and pebbles. 



Lat. 37° 08' K, Long. 122° 28' W. (Sta. 3148). Off central 

 California, in 47 fms., brown mud. 



The known geograpliical range is therefore from off central Cali- 

 fornia ^ to the Bering Sea, whUe the range in depth is from 47 to 97 

 fms. This is one of the most common species of nemertean dredged 

 by the Albatross in the off" shore waters of the Pacific Ocean and 

 Bering Sea. 



The general color of body, nunaber of ocelli, number of probos- 

 cidial nerves, position of cerebral sense organs are characters in which 

 this species agrees with A. ruhellus., but the presence of a highly 

 developed esophageal caecum in the latter will readily distinguish 

 the two species. 



A single specimen probably belonging to the above species was 

 dredged in 50 fms., green muddy bottom, at a point oft' the coast of 

 central California (Sta. 3165, Lat. 37° 59' K, Long. 123° 08' W.). 

 This specimen was 60 mm. long, 6 mm. ^\dde and 2i to 3 mm. in 

 thickness ; the body was much flattened throughout and compara- 



1 Possiblj' from the Gulf of California. Seep. 271. 



