[2], 194, 7, [3] pp. Text in Japanese. Specimens described by Kikutaro Baba. 50 color plates from paintings and multiple b&w illustrations. (4to) 29.8x21 cm (11¾x8¼"), original green cloth lettered in gilt, publisher's slipcase. First Edition.
Emperor Hirohito was an avid shell collector and amateur marine biologist. These specimens were collected near his residence on Sagami Bay and were painted soon afterward to preserve their natural color.