1908.] NATURAL SCIENCES OF PHILADELPHIA. 321 



SOME POLYCH^TOUS ANNELIDS OF THE NORTHERN PACIFIC COAST 

 OF NORTH AMERICA. 



BY J. PERCY MOORE. 



This paper is a final report embodying the results of a study of all of 

 the Polychceta submitted to me by the U. S. Bureau of Fisheries from 

 the collections made by the steamer Albatross during the summer of 

 1903. I'rom June 19 to August 24 of that year, while in the service of 

 a special Commission appointed by the President to investigate the 

 salmon fisheries of Alaska, the Albatross cruised northward along the 

 coast from Port Townsend and Vancouver on the south, through part 

 of the labyrinth of straits and passages which separate the islands of 

 southeastern Alaska, as far as Shelekof Strait on the north and west, 

 occupying meanwhile 112 dredging stations and a number of addi- 

 tional hydrographic and towing stations. Some little shore collecting 

 was also conducted. 



During the cruise the vessel was under the command of the late 

 Lieut. Franklin Swift, U.S.N. , to whose skill in handhng her must 

 be largeh^ credited the large number of successful hauls made with 

 trawl and dredge. The extent of the collection and the generally 

 excellent preservation of the annelids similarly attest the energy and 

 ability which Prof. Harold Heath devoted to collecting the inverte- 

 brates, placed under his immediate charge. 



In all 107 species of Polychseta are represented. Of this number 41 

 species are considered to be previously und escribed. The descriptions 

 of only two of these, however, appear for the first time in this paper, the 

 remaining 39 having been published, with the courteous approval of 

 the Commissioner, Hon. George M. Bowers, in these Proceedings for 1905, 

 pp. 525-569, 846-860, and for 1906, pp. 217-260, together with plates 

 illustrating important diagnostic features. 



Supplementing the results of the study of the Albatross collections 

 are added some notes on a few polychsetes in the collection of this 

 Academy, gathered by Dr. Benjamin Sharp at Icy Cape^ and Unalaska, 



' The northernmost point of that nnme. 



