THE LYSIANASSID AMPHIPOD CRUSTACEANS OF NEW- 

 FOUNDLAND, NOVA SCOTIA, AND NEW BRUNSWICK 

 IN THE UNITED STATES NATIONAL MUSEUM 



By Clarence R. Shoemaker 



Assistant Curator, Division of Marine Invertebrates, United States National 



Museum 



Since 1905, when S. J. Holmes published his paper on the Amphi- 

 poda of the New England coast, very little has been done with the 

 amphipod fauna of the east coast of America. While examining 

 the amphipod collections in the National Museum, the great bulk 

 of which are unidentified, I have been impressed by the great num- 

 ber of species, many of which appear to be new. 



During the early days of the United States Fish Commission (now 

 the Bureau of Fisheries) valuable dredgings were made off New- 

 foundland and Nova Scotia which proved to be very rich in amphi- 

 pods. This material forms the basis of the present series of papers 

 upon the amphipod fauna of Newfoundland, Nova Scotia, and New 

 Brunswick, of which the present, comprising the family Lysianas- 

 sidae, is the first. 



Among the species represented by this family are two which 

 appear to be new to science, and these I have designated as Orcho- 

 me7ie depressa and Orchomene macroserrata. 



Family LYSIANASSIDAE 



ACIDOSTOMA LATICOENE G. O. Sars 



1879. Acidostoma laticorne G, O. Saes, Arch. Naturv. Kristian., vol. 4, 



p. 440. 

 1885-86. A. laticorne G. O. Sass, Norske Nordhavs-Exp., vol. 6, Crust. I, p. 



152, pi. 13, fig. 3, Sa, male. 



Station 2481 steamer Albatross, east of Nova Scotia, 44° 07' 30'' N., 

 57° 16' 45" W., July 5, 1885, 116 fathoms, gravel; 1 specimen. 



This female specimen measures about 8.5 mm. As this sex has 

 not been figured, I have made drawings in order to show wherein it 

 differs from the male. Stebbing says of the genus Acidostoma^ 



1 Tlerreich, Amph., vol. 1, p. 14. 



No. 2827.— PROCEEDINGS U. S. NATIONAL MUSEUM. VOL. 77, ART. 4 

 88140 — 30 1 



