3 unnumbered leaves, [ix]-xvi, 144 pages, 2 unnumbered leaves, XII colour plates : illustrations ; (8vo)

The invisible world revealed by the microscope ; or, thoughts on animalcules / By Gideon Algernon Mantell.

viii, 704 pages, 24 unnumbered leaves of plates : illustrations ; 23 cm

A history of infusorial animalcules, living and fossil / by Andrew Pritchard.

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Infusoria - Early works

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The invisible world revealed by the microscope ; or, thoughts on animalcules / By Gideon Algernon Mantell.

A history of infusorial animalcules, living and fossil / by Andrew Pritchard.