Cantareus subapertus. Anatomical details of the genital organs; specimen collected at Ighil Bourmi, leg. H. Bouaziz- Yahiatene, NMBE 550458 10 situs of the genital organs, 46 mm total length 11 partly everted genital atrium with the atrial stimulator 12 distal penial tube with pp2 13 penis and epiphallus completely opened showing both papillae, and the internal structure of the penial chamber and the epiphallus 14 detail of the penial lumen; note: the needle represents the epiphallial canal, with pp2 bent upwards to show the ending of the canal. Abbreviations: ag = albumen gland; as = atrial stimulator; div = diverticulum; ds = dart sac; ep = epiphallus; f = flagellum; gm = glandulae mucosae; hd = hermaphroditic duct; mrp = musculus retractor penis; p = penis; pp1 = penial papilla 1; pp2 = penial papilla 2; spo = spermoviduct. All figures not to scale.