Determination tables for the small gastropods from the Paris Basin Eocene

ARALYTXCAL SUMMARY – The 35 species cf Marginellidae from the Eocene of the JStrisian Basin are divided into their genera and subgenera; they ere subject of dichotomical determination tables* vith systcaatic figures and critical taxonomie comments. The localities and stratigraphical distribution of each species are stated. A nev species, Marginalla (Stazzania) pseudovolvarina, and a nev subspecies, Marginella (Volvarina) bouryi supraeocarnica, are described and illustrated. One variety is raised to% the rank of species, Gibberula spirata, and ancther to the rank of subspecies, Marginalia (Stazzania) eburnea pentaptycta. The Species Marginella (Glabella) allixi is reported in the Parisian Easin •for the first time.