M1061, In numerous samples dredged in the New Caledonian area during many cruises (MUSORSTOM 4, 5 and 6, in particular), 11 species of mysidaceans were caught, 3 of which new to science. Nine belong to the sub-order Lophogastrida: Gnathophausia ingens, G. elegans fagei, Lophogaster manilae, L. neocaledonensis sp. nov., Paralophogaster glaber, P. foresti, P. philippinensis, P. boucheii sp. nov., and Eucopia australis. Two others belong to Mysida: Petalophthalmus armiger and Hansenomysis carinata sp. nov. Some original morphological features are provided for a few already known species (such as the description of females of L. manilae), as well as the bathymetric distribution of species of Lophogaster and Paralophogaster.