342 PROCEEDINGS OF THE ACADEMY OF [June, 



ceding to be variants of the same species, the considerable amount of 

 material which I have examined exhibits no evidence of intergrada- 

 tion and the two forms are therefore listed separately. It is noteworthy 

 that they were taken on bottoms of quite different character. 



Stations 4194, Halibut Bank, Gulf of Georgia, 111-170 fathoms, 

 soft green mud ; 4197, same region, 31-90 fathoms, sticky green mud 

 and fine sand ; 4244, Kasaan Bay, Prince of Wales Island, southeastern 

 Alaska, 50-54 fathoms, green mud; 4258, vicinity of Funter Bay, 

 Lynn Canal, 300-313 fathoms, mud; 4286, Chinak Bay, Alaska, 57-63 

 fathoms, green mud and rock. 



Nephthys malmgreni Theel. 



Nephthys longisetosa Malmgren, Kgl. Vet.-Akad. Forh., 1865, p. 106; non 



Oersted. 

 Nephthys malmgreni Theel, Kgl. Sv. Vet. Akad. Handl., 1879, No. 3, p. 26. 



Although recorded at various points in the North Atlantic and Arctic 

 Oceans this species has not previously been taken in the Pacific. It 

 occurs in the collections from the vicinity of Yes Bay, Behm Canal, 

 only, at Stations 4236, 147-205 fathoms, rock and coarse sand, and 

 4238, 229-231 fathoms, rocks and mud. 



Nephthys assimilis Malmgren. 



Nephthys assimilis Malmgren, Kgl. Vet.-Akad. Forh., 1865, p. 105. 

 No representatives of N. assimilis occur among the material dredged 

 by the Albatross, but the collection of the Academy of Natural Sciences 

 of Philadelphia contains several examples which agree exactly with the 

 descriptions given by Malmgren and Theel, and which were collected 

 by Dr. Benjamin Sharp in 5 fathoms at Icy Cape, Alaska. 



NEREIDS. 



Nereis pelagica Linnaeus. 



Nereis pelagica Linn.'Bus, Sys. Nat., Ed. X, p. 654. 



Although quite common and represented from nearly the entire 

 region covered by these collections, the individuals are of smaller size 

 than occur on the Atlantic side of the continent. 



Stations 4193, Halibut Bank, Gulf of Georgia, B. C, 18-23 fathoms, 

 green mud and fine sand ; 4209, Admiralty Inlet, vicinity of Port Town- 

 send, Washington; 4247, Kasaan Bay, Prince of Wales Island, south- 

 eastern Alaska, 89-114 fathoms, green mud, fine sand and broken 

 shells; 4253, Stephens Passage, Alaska, 131-188 fathoms, rocks and 

 broken shells; 4274, Alitak Bay, Kadiak Island, 35-41 fathoms, green 

 mud and fine sand. At Port jMcArthur, on August 23, two small 

 heteronereids were taken at the surface. Also collection of Acad. Nat. 

 Sci. Phila., several collected at Unalaska by Dr. Sharp. 



