Twenty one species (16 new) in 12 genera (2 new) in 3 families of myodocopid Ostracoda collected mostly at bathyal and abyssal depths in the Bay of Biscay and the eastern end of the West European Basin during 13 cruises (1969-1983) by personnel of the Centre National de Tri d'Océanographie Biologique (CENTOB), France, are described and illustrated. Seventeen species are reported from abyssal depths (below 2000 m), and 13 species are reported from bathyal depths (200-2000 m). All benthic species collected below 3480 m were blind, which is close to the depth of 3775 m previously reported for species in southern oceans (Kornicker, 1975a:48). Specimens collected extend northward the known ranges of the genera: Hadacypridina Paulson, 1962, Metavargula Kornicker, 1970, and Paradoloria Hanai, 1974.Three species not included in the study area are presented in the text for purposes of comparison.
