Horned turban (Sazae)

Japanese: サザエ(栄螺) - サザエ（英語表記）horned turban

A snail shell of the Turbinidae family (illustration). The "sa" in Turbinidae means "small" and the "e" means "house," so Turbinidae is said to mean "small house." It is fist-shaped and sturdy. The shell is 10 cm high and 8 cm wide excluding the horns. It has six layers, with each layer having five thick ribs and a thinner rib between them. Thick, tubular horn-like projections (thorns) grow on the shoulders of the lower layers and on the thick ribs at the base of the shell. The number of horns is usually around 10, but individuals that live in inland bays such as the Seto Inland Sea often lack horns, whereas those in the open sea are well developed.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

リュウテンサザエ科の巻貝（イラスト）。サザエのササは小さいこと，エは家のことで，サザエとは〈小さい家〉の意といわれる。こぶし形で堅固。殻の高さ10cm，太さは角を除いて8cmに達する。巻きは6階，各巻きには5本の太い肋とその間に細い肋がある。下方の巻きの肩と殻底の太い肋の上には太い管状の角状突起(とげ)ができる。角の数は通常10本内外であるが，瀬戸内海など内湾にすむ個体には角を欠くことが多く，外海ではよく発達している。

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

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