4 U.S. NATIONAL MUSEUM BULLETIN 22 7 



identification. Besides information gathered from the literature, 

 the present work is based on the following : 



(1) Field studies, including intertidal collecting and shallow dredg- 

 ing, conducted by the writer in the New England region. These 

 studies were confined chiefly to the Woods Hole and Cape Cod region 

 of Massachusetts; the New Hampshire coast and vicinity; and 

 Maine and New Brunswick, especially the Boothbay Harbor region 

 and northern Maine. During parts of five summers in the Cape 

 Cod area, two of them devoted to intensive collecting, my work was 

 aided by members of the Supply Department of the Marine Bio- 

 logical Laboratory of Woods Hole, especially Mr. Milton Gray, who 

 collected a great wealth of material, and by members of the staff and 

 students in the invertebrate and ecology classes at the Laboratory. 

 Sporadic collecting during a couple of years in New Hampshire was 

 aided by members of the staff and students in the summer inverte- 

 brate classes of the University of New Hampshire. Most of the 

 work in Maine was done during the summer of 1955 and was aided by 

 Dr. George M. Moore and members of the U.S. Fish and Wildlife 

 Service at Boothbay Harbor. This material, as well as that men- 

 tioned below, has in large part been deposited in the U.S. National 

 Museum. 



(2) Collections from various sources, chiefly from the New Eng- 

 land region: A sizable collection of polychaetes among the fouling 

 organisms from the buoy surveys conducted by the late Dr. Louis W. 

 Hutchins of the Woods Hole Oceanographic Institution; material 

 gathered by Albatross HI, chiefly from Georges Bank, received from 

 Dr. Roland L. Wigley of the U.S. Fish and WildHfe Service, Woods 

 Hole; material from Woods Hole and the Cape Cod area received 

 from Dr. John Rankin, Jr.; collections made in Buzzards Bay by Dr. 

 Howard Sanders and Dr. Nathan Riser; specimens from Nantucket 

 Sound received from Mr. Thayer Shafer; material collected at the Nar- 

 ragansett Marine Laboratory, Rhode Island, by Dr. Donald Zinn, Mr. 

 Alden P. Stickney, Mr. Louis D. Stringer, and Mr. Harry P. Jeffries; 

 collections made by Mr. Anthony Ganaros of the Maine Department 

 of Sea and Shore Fisheries; specimens from Mr. Robert Hanks and 

 Mr. Louis Taxiarchis of the U.S. Fish and Wildlife Service, Boothbay 

 Harbor; material collected in the Chincoteague Bay area of Maryland 

 by Dr. Samson McDowell, Jr.; collections made at Cape Ann, Massa- 

 chusetts, by Dr. Ralph W. Dexter; specimens from Woods Hole and 

 Puerto Rico from Dr. M. Jean Allen; material from Sapelo Island, 

 Georgia, received from Dr. John M. Teal; miscellaneous material 

 from Dr. Robert Howard, Dr. Emery F. Swan, and Mr. W. L. Klawe; 

 collections from the Canadian Atlantic coast, St. Lawrence estuary 

 and Gaspe, Newfoundland, Cape Breton Island, Nova Scotia, and 



