Samples taken in the north-east part of the western Mediterranean provided a collection of 28 species of Gammaridean Amphipods. These 45 samples were obtained in deep muddy bottom off the coasts of Corsica and regions of Monaco and Esterel, from 180 to 1 110 meters. In addition to a species previously described (Urothoe corsica D. Bellan-Santini, 1965) this collection includes 3 other new species and a new genera : Carangoliopsis spinulosa n.g., n.sp., Pardaliscoides stebbingi n.sp., Lembos angularis n.sp. The geographical and bathymetrical distribution, the ecological signification, as well as the frequency of al1 the species are indicated. Lastly, an annex regroups the 24 species collected off the French coasts of the Mediterranean since the publication of the volume of the Faune de France [1925].