海産無脊椎動物の生殖腺の成熟に関する研究-VIII:アメリカフジツボの生殖器ならびに付属器官の構造

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Histological observations were made to elucidate the structure of the reproductive and other internal organs of the foreign barnacle, Balanus eburneus, which inhabits the bamboo-made rafts used for oyster cultivation in Lake Kamo-ko, a brackish lake located in Sado Island of the Japan Sea. The materials used were collected at monthly intervals during May to December, 1971. The male genital organ consisting of the testis, seminal tubules, seminal vesicles and vas deferens, and its seasonal changes with special regard to the spermatogenesis are described. The ovary and its ovarioles that appear in an arborescent manner are mentioned, with a description of the developing ova and the larvae contained in the mantle cavity. It is believed that the breeding season might be in summer. Findings on the internal anatomy of the visceral organs are also stated.