Archive image from page 129 of Das süsswasser-plankton; einführung in die. Das süsswasser-plankton; einführung in die freischwebende organismenwelt unserer teiche, flüsse und seebecken dasssswasserpl00zach Year: 1911 iFtg. 51. Omitho- cercus magnificus. £iq. 52. Ceratocorys horrida.

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