10 BULLETIN 2 01, UNITED STATES NATIONAL MUSEUM 



into the Atlantic. In her operations in the Atlantic the Challenger 

 also collected Eucopia unguiculata, Boreornysis microps, and Siriella 

 thompsonii in the deeper waters off the Atlantic slope of eastern Amer- 

 ica, and Heteromysis bermudensis at Bermuda. The Vettor Pisani 

 (1882-1885), an Italian expedition, made collections at several points 

 near the American coasts. The Mysidacea were described by Colosi 

 (1924) and Coifmann (1937), and several new species were recorded, 

 mainly from the coasts of South America and from the Caribbean 

 Sea. The German plankton expedition, 1889, touched at the northern 

 coasts of Brazil, and Ortmann (1893) described Chlamydopleon 

 aculeatum from those waters. The Swedish Antarctic expedition, 

 1901-1903, made several dredgings in the neighborhood of the Falk- 

 land Islands, and Hansen (1913a) described Mysidopsis acuta and 

 Mysidetes crassa from that area. The Italian naval cruiser Liguria 

 collected material in the Caribbean Sea and off the coasts of South 

 America, and from these collections Colosi (1916, 1919, 1920) re- 

 corded Anchialina typica, Siriella thompsonii, Euchaetomera tenuis, 

 Doxomysis tattersallii, Doxomysis microps, and Caesaromy sides 

 liguriae, the last an aberrant bathypelagic species of great interest. 

 The Terra Nova expedition, 1910, collected Promysis atlantica off Rio 

 de Janeiro (Tattersall, 1923). In recent years American-equipped 

 deep-sea expeditions have added their quota of species to the Amer- 

 ican fauna. The most important of these are Dr. Bigelow's explora- 

 tions off the coasts of Maine (Tattersall, 1926), Mr. Vanderbilt's 

 various cruises (Boone, 1930), Dr. Beebe's expeditions in the western 

 Atlantic (Tattersall, 1936a), the Johnson-Smithsonian Expedition 

 to the Puerto Rican Deep, 1933 (Tattersall, 1937), and the Presiden- 

 tial Cruise, 1938 (Tattersall, 1941). The cumulative work of a cen- 

 tury has resulted in a fairly complete knowledge of the mysidacean 

 fauna of the American Continent. It now includes 112 species, a 

 complete list of which is herein part of the table of contents. Much 

 work, however, remains to be done. The littoral fauna of the eastern 

 coasts of North America south of Virginia, the whole coast of South 

 America, and much of the west coast of the United States require 

 systematic investigation, while the results of deep-sea exploration 

 give promise that many species still await discovery in the deeper 

 waters off the continent of America. 



Reference to the Contents (p. in) of this volume will indicate 

 which of the species contained herein are American. Such species 

 are marked with an "A" after the specific name. 



