NOTES ON CERTAIN AI^IPHIPODS FROM THE GULF OF 

 MEXICO, WITH DESCRIPTIONS OF NEW GENERA AND 

 NEW SPECIES. 



By Arthur S. Pearse, 

 Of the University of Wisconsin, Madison, Wisconsin. 



The following notes are a report on a portion of the amphipods 

 from the Gulf of Mexico in the collection of the United States National 

 Museum. These collections are from several sources and extend 

 over a long period of years. The greater part of them have not yet 

 been examined. Those described below were taken chiefly by the 

 steamers Fish HavjJc and Albatross of the United States Bureau of 

 Fisheries, 



Tribe GAMMARIDEA. 



Family LYSIANASSID^. 



LYSIANOPSIS ALBA Holmes. 



Fish Hawh station 7402, Pigeon 

 Key Lake, 9 feet, January 7, 1903 ; 

 11 specimens. 



Fish Hawk station 7431, Grassy 

 Key Lake, 8 feet, January 28, 1 903 ; 

 2 specimens. 



Albatross stations 2369-2374, 

 between Delta of Mississippi and Cedar Keys, 25-27 fathoms. 



Key West, below low tide' among algse; Henry Hemphill; 12 

 specimens. 



Family AMPELISCID^E. 



AMPELISCA HOLMESn Pearse, 



Albatross stations 2369-2374, between Delta of Mississippi and 

 Cedar Keys, 25-27 fathoms. 



Punta Rassa, Charlotte Harbor; Henry Hemphill, February, 1884; 

 34 specimens. 



Family HAUSTORIID.E. 



HAUSTORIUS ARENARIUS (Slabber). 



Pensacola; Albatross, February 3, 1885; 16 specimens. 



Proceedings U. S. National Museum, Vol. 43— No. 1936, 

 48702°— Proc.N.M.Yol.43— 12 24 369 



Fig. 1.— Ltsianopsis alba, g', second 



GNATHOPOD. 



