Ueber Euplectella aspergillum (R.Owen) : ein Beitrag zur Naturgeschichte der Kieselschwämme / von C. Claus.

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Ueber Euplectella aspergillum (R.Owen) : ein Beitrag zur Naturgeschichte der Kieselschwämme / von C. Claus. Public Domain Mark. Source: Wellcome Collection.

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