Genitalia and anatomy of Hystricella bicarinata. Pico do Castelo, S slope around the Miradouro: 38 whole genitalia excluding part of OSD, AG and gonads 39 ornamentation of the inner walls of the distal penis, the vagina and the genital atrium 40 transverse section of penial papilla. Pico da Gandaia: 41 whole genitalia excluding gonads 42 ornamentation of the inner walls of the flagellum, the penial complex, the vagina and the genital atrium. Ribeira de Serra de Dentro: 43 jaw. Pico da Gandaia: 44 mantle border. Ribeira de Serra de Dentro: 45 whole genitalia excluding part of OSD, AG and gonads. Scale bars 1 mm.