Epitonium castum and related species

fig. 1 Epitonium castum (A. Adams, 1873) Sagami Bay, Japan in 0m. 9.6mm	fig. 2 Epitonium castum (A. Adams, 1873) Sagami Bay, Japan in 0m. 8.4mm	fig. 3 Epitonium castum (A. Adams, 1873) Mouth of Tokyo Bay, Japan in 30m. 10.8mm	fig. 4 Epitonium castum (A. Adams, 1873) Mouth of Tokyo Bay, Japan in 0m. 7.4mm
fig. 5 Epitonium vigintifoliatum (Masahito, Kuroda & Habe in Kuroda, Habe & Oyama, 1971) Sagami Bay, Japan in 0m. 7.4mm	fig. 6 Epitonium vigintifoliatum (Masahito, Kuroda & Habe in Kuroda, Habe & Oyama, 1971) Sagami Bay, Japan in 0m. 7.3mm	fig. 7a Epitonium sp Sagami Bay, Japan in 0m. 8.8mm	fig. 7b
fig. 8 Epitonium japonicum (Dunker, 1861) Sagami Bay, Japan in 0m. 7.9mm	fig. 9 Epitonium angustum (Sowerby, 1844) Sagami Bay, Japan in 0m. 7.8mm	fig. 10 Epitonium angustum (Sowerby, 1844) Kii Peninsula, Japan. 7.2mm
fig. 11a fig. 11b Epitonium sp Sagami Bay, Japan in 0m. 7.6mm	fig. 12a fig. 12b Epitonium sp Sagami Bay, Japan in 0m. 7mm	fig. 13a fig. 13b Epitonium sp Sagami Bay, Japan in 0m. 8.4mm	fig. 14a fig. 14b Epitonium sp Sagami Bay, Japan in 0m. 7.4mm
fig. 15 Epitonium gracile (Sowerby, 1844) Sagami Bay, Japan in 0m. 15.5mm	fig. 16 Epitonium aculeatum (Sowerby, 1844) Sagami Bay, Japan in 0m. 9.4mm