A new species of Vitrina (Gastropoda, Pulmonata, Vitrinidae) from Kenya with a discussion of the genus in East Africa

Vitrina chyuluensis spec. nov. is described from the Chyulu Hills, Kenya. It has a rather large shell and is characterised by a long spermathecal duct, very fine plicae between distal and proximal parts of the penis, and a three-ridged jaw. The description is followed by a discussion on the classification of East African species of Vitrina and on the variation in characters probably of taxonomic significance at specific level. The paper is concluded by some comments on naming Vitrina from East Africa.