QH 1 B4X '0, pp. 565-580 24 January 1977 NH PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON A NEW GENUS OF PRIMITIVE MARINE HADZIID (AMPHIPODA) FROM BIMINI AND PUERTO RICO By Roger J. Zhsimerman and J. Laurens Barnard Department of Marine Sciences, University of Puerto Rico, Maijaguez, Puerto Rico, 00708 and Department of Invertebrate Zoology, Smithsonian Iristitution, Washington, D.C. 20560 A new genus of marine hadziid bearing eyes and well devel-oped male gnathopod 2 typical of marine gammarid amphi-pods (Crustacea) is described from shallow marine waters of Bimini and Puerto Rico. The family Hadziidae, established by S. Karaman (1943) and later synonymized with Gammar-idae by Stock and Nijssen ( 1965 ) , is resurrected, newly diag-nosed and restricted in content. Hadziids are primarily Tethyan in distribution and were originally discovered in caves of Yugoslavia by S. Karaman ( 1932 ) . Most of the taxa are subterranean, having been found in ground waters and caves of tlie Mediterranean, in northern Mexico, or on islands of the Indian Ocean, and Caribbean Sea. Only three species, including that described herein, occur in fully marine habitats. The first to be discovered was Liago-ceradocus pusillus J. L. Barnard, 1965, from a Micronesian atoll. Barnard did not recognize the "freshwater" affinity of his blind species and erected a new genus, Liagoceradocus, now recognized as a synonym of Hadzia. A second IndoPacific species was established by Barnard (in press). That species lives in anchialine environments (Holthuis, 1973, anchialine, "near the sea") i.e., in lava ponds of Hawaii. Lava ponds are pools of brackish water near the sea in lava fields, the ponded water being interconnected by percolation to underground porous aquifers wliich themselves are influenced by ingressing seawater. A third marine hadziid, 50— Proc. Biol. Soc. Wash., Vol. 89, 1977 (565)
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