Heminerita japonica (English spelling)

Japanese: アマガイ(蜑貝) - アマガイ（英語表記）Heminerita japonica

A thick-shelled, semicircular snail of the Neritidae family that lives on coastal rocks (illustration). The shell is about 1.8 cm high and 1.9 cm wide, with a smooth, black surface with yellow-white spots and colored bands. The shell opening is semicircular, round on the outside and straight on the inside. The lid is calcareous and semicircular. It is commonly found from the Boso Peninsula of Honshu to Kyushu and the Korean Peninsula. In summer, it lays yellow-white oval egg sacs on rocks. Theliostyla albicilla , a member of the same family, is similar to this species, but has about 20 thick ribs on the surface of its shell.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

海岸の岩場にすむ殻の厚い半円形のアマオブネガイ科の巻貝（イラスト）。殻の高さ1.8cm，太さ1.9cmくらい，表面は滑らかで黒色の地に黄白の斑点や色帯がある。殻口は半円形で，外のほうは丸く，内のほうはまっすぐ。ふたは石灰質で半円形。本州の房総半島から九州，朝鮮半島にふつう。夏季，岩れきの上に黄白色楕円形の卵囊を産む。同科のアマオブネガイTheliostyla albicillaはこの種に似るが，殻表に太い肋が約20本ある。

出典　株式会社平凡社世界大百科事典第２版について　情報

<<: Tree frog (Amagaeru) - Amagaeru (English spelling) tree frog

>>: Dependence - Amae