Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Journal of the Faculty of Science, Hokkaido University. Series 6, Zoology >
Vol. 17 No. 3 >
On the Incompatibility of Two Species of Hydra, Hydra magnipapillata and Pelmatohydra robusta, in a Mixed Culture (With 4 Text-figures)
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