Penis, Wallaconchis uncinus, Indonesia. A Two most distal loops of fully evaginated penis (the loop on the right is proximal to the loop on the left), Halmahera, scale bar 0.5 mm [5079] (UMIZ 00011) B Two most distal loops of (nearly fully evaginated) penis (the loop on the right is proximal to the loop on the left), Ambon, scale bar 300 μm [2843] (UMIZ 00007) C Proximal region of penis, detail view of curved hooks, Sulawesi, scale bar 100 μm [2268] (UMIZ 00005) D Distal region of penis which is not fully evaginated, scale bar 300 μm, same as C. Abbreviations: ch curved hooks ih immature hooks rh rounded hooks.