Penis, Wallaconchis ater, Indonesia. A Detail of distal portion when fully relaxed (with distal penial projections) and partial view of the coil, Indonesia, Halmahera, scale bar 500 μm [3393] (PNM 041218) B Detail of distal portion when fully relaxed (with distal penial projections) and partial view of the coil, Halmahera, scale bar 500 μm [5125] (UMIZ 00054) C Partial view of the coil (with six loops), Philippines, Bohol, scale bar 500 μm [3266] (PNM 041214) D Cross-section showing the longitudinal fold, Bali, scale bar 300 μm [3137] (UMIZ 00053).