1908.] NATURAL SCIENCES OF PHILADELPHIA. 343 



Nereis procera Ehlers. 



Nereis procera Ehlers, Die Borstenwiirmer, 1868, p. 557. 

 This little known species is represented by a single incomplete 

 specimen taken at the type locality in the Gulf of Georgia. Station 

 4193, Halibut Bank, Guif of Georgia, 18-23 fathoms, green mud and 

 fine sand. 



Nereis paucidentata Moore. 



Nereis paucidentata Moore, Proc. Acad. Nat. Sci. Phila., 1903, pp. 430, 431, 

 PI. XXIV, figs. 28-30. 



Originally described from specimens dredged in Bering Sea, the 

 present collections show that this species is rather widely distributed 

 along the northern portions of the east side of the Pacific also. At the 

 same time they permit of the verification of the characters originally 

 attributed to the species. Several specimens with the probosces pro- 

 truded exliibit paragnaths exactly like those of the type, except that 

 groups III and IV vary somewhat, being provided with 3 to 5 denticles 

 arranged in various patterns. One had 5 teeth arranged in a perfect 

 quincunx. The basal ring of one specimen bears 4 cones at VII, 



Stations 4198, Halibut Bank, Gulf of Georgia, B. C, 157-230 fathoms, 

 soft green mud ; 4228, vicinity of Naha Bay, Behm Canal, southeastern 

 Alaska, 41-134 fathoms, gravel and sponge; 4239, junction of Clarence 

 Strait and Behm Canal, 206-248 fathoms, coarse sand and rocks, one 

 specimen from this station is a large female bursting with eggs, 80 mm. 

 long and having 120 segments; 4253, Stephens Passage, Alaska, 131- 

 188 fathoms, rocks and broken shells; 4300, off Shakan, Sumner Strait, 

 southeastern Alaska, 185-218 fathoms, rock and mud. 



Nereis cyclurus Harrington. 



Nereis cyclurus Harrington, Trans. N. Y. Acad. Sci., XVI, 1897, p. 214. 



This remarkable and interesting species should probably be separated 

 generically from the above. In only one case is it stated that the 

 specimens were taken from a hermit crab (E. wpagurus armatus), in the 

 shell of which this annelid usually lives as a commensal. The finding 

 of a male heteronereis is of interest, especially as it was taken on the 

 shell of a hermit crab. After an elaborate study of this species Plar- 

 rington records his failure to find a male, and states his belief that males 

 are strictly pelagic in habit. 



Stations 4201, Queen Charlotte Sound, off Fort Rupert, Vancouver 

 Island, B. C, 138-145 fathoms, soft green mud, sand and broken shells, 

 a small specimen, " general color bright pink, in delicate tube composed 

 of mucus attached to sponge"; 4218, Admiralty Inlet, vicinity of Port 

 Townsend, Washington, 16 fathoms, soft green mud, 1 ordinary form 



