 The description of the reproductive system of "Ringicella ringens" as described by Fischer (1869) applies in all essential details to "Anostoma depressum" with the exception of a penis retractor muscle attached to the vas deferens.In "Anostoma depressum" the external reproductive pore, located on the right side of the head, leads into a small atrium with which the penis, hermaphroditic duct, and seminal receptacle attach.The first named is a heavy, muscular organ, accompanied by the usual slender vas deferens, their union being effected at some distance from the distal end of the penis, which thus forms a flagellum.