About 2000 earthworm specimens, collected during 1987–1988 in 50 localities of North‐Western Turkey, are described and classified. They belong to 51 species, 14 of which have not previously been described. For some new species it has been necessary to institute the new genusHealyellawhich is closely related to the genusSpermophorodrilusBouché; both these genera are included in the new lumbricid subfamily Spermophorodrilinae, characterized by a peculiar pattern of copulating. Six other new species, some of which show curious morphological traits, are included in the genusDendrobaena,and one in the genusAllolobophora.