S.  Hirase, Nihon kairui zukan: temenshoku shashim [A collection of Japanese shells with illustrations in natural colors], 3rd ed. Tokyo: M. Sanshodo, 1934, p. 217.

S.  Hirase, Nihon kairui zukan: temenshoku shashim [A collection of Japanese shells with illustrations in natural colors], 3rd ed. Tokyo: M. Sanshodo, 1934, p. 217.