parietem appresso, lamina valida intrante juxta angulum parietis ; margine columellari late, profunde et depresse sinuato ; margine dextro superne sinuato, lamellis pluribus, quarum 4 lonqioribus, intrantibus munito. Long. 14,hiam. 6 mill. Hnb. Sierra Leone, West Africa (CoU. E . Higyins). This species is somewhat near E. cyathostonza, Pfr., from Old Calabar, and is peculiar from the deep and depressed sinus in the left margin of the aperture. DESCRIPTION OF PLATE xxvrr.