Stygologia 2 (112) 1986, E. J. Brill, Leiden PODOCOPID OSTRACODA OF BERMUDIAN CAVES ROSALIE F. MADDOCKS Department of Geosciences, University of Houston-UP, Houston Texas 77004, U.S.A & THOMAS M. ILIFFE Bermuda Biological Station for Research, Inc., Ferry Reach 1-15, Bermuda SUMMARY About 33 species have been identified in 52 samples of podocopid Ostracoda collected in 24 in- land marine caves on bermuda. One genus (Aponesidea) and 10 species are described as new, 11 have been previously described, and 12 are reported in open nomenclature. At least 12 species are endemic to Bermuda, while another 9 species are widely distributed in carbonate en- vironments of the Caribbean-Antillean region. The majority are not restricted to the caves bul occur also in sediments collected from Harrington Sound, Castle Harbour, North Lagoon, the South Shore, and other open-water localities of Bermuda. Four fresh- to brackish-water species belong to ecologically tolerant and geographically widely dispersed genera. Approximativement 33 espbces ont Ctt dttermintes dans 52 Cchantillons d'ostracodes Podocopi- des recueillis dans 24 grottes marines de l'inttrieur des Bermudes. Un genre (Aponesidea) et 10 espbces sont dtcrits ici comme nouveaux; 11 esptces ttaient dtj&dtcrites, et la prtsence de 12 autres est mentionnte de manitre incompltte. Au moins, 12 esptces sont endtmiques pour les Bermudes, tandis que 9 autres esptces sont largement distributes dans des milieux carbonatts des Caraibes (Antilles). Dans leur majoritt il s'agit d'tltments non restreints au milieu des grot- tes, mais trouvts aussi dans les sCdiments tchantillonnts & Harrington sound, Castle Harbour, North Lagoon, South Shore, et dans d'autres localitts similaires des Bermudes (eaux marines ouvertes). Quatre esptces dulcaquicoles-salmastricoles appartiennent B des genres tcologique- ment tolCrants et & vaste distribution gtographique. INTRODUCTION The inland marine caves of Bermuda comprise a diverse range of habitat types. Caves situated along the coastline often act as tidal springs with flow changing direction every 6 hours with the tides. Owing to the abundant food supply, the walls and ceilings of such caves are literally covered with encrusting organisms including sponges, hydroids, and bryozoans. Those caves which act as major tidal conduits to inshore water bodies, in particular the nearly enclosed and tidally dampened Harrington Sound, have moderate currents flowing through them. Farther inland into the caves, where water currents and food transport from open waters decrease, a reduction in the number of species occurs. Caves with the poorest connection to the sea are characterized by very clear waters