In this second paper of the series are treated Halgerda rubicunda BABA of Dorididae and Catriona ornata (BABA) and C. pinnifera (BABA) of Cuthonidae. The first of the three was collected near the Seto Marine Biological Laboratory and an egg-mass was brought back to my home to rear veligers, while other two were collected at Tannowa facing Osaka Bay and observations were made at my home.
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Iwao Hamatani (1960) studied this question.
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