The recent Western Europe species with short swimming setae on the second antennae are revised. The work is based on the examination of the type-material of 10 of the 11 species described in the literature. Diagnosis, complements of description, taxonomic history and discussion, data on ecology and geographical distribution are given for each species. The carapace of each species is shown on scanning electron micrographs. Tables allowing direct comparison between closely related species are given. Two keys to the species are proposed.