A revision of the specimens described by Sars, 1894, as Gammarus campylops Leach, 1814, proved that they did not belong to that species, nor to Gammarus ochlos Reid, 1945 (= G. sarsi Reid, 1943), as Reid believed. Reid’s species, of which also original specimens have been reexamined, is identical with Gammarus zaddachi Sexton, 1912. Sars’s material is redescribed here in detail, under the name of Gammarus inaequicauda Stock, 1966.