Henshaw Collection

Henry W. Henshaw Collection (5,347 slides)

This collection covers 122 diatom genera and 1356 species and was made between 1912 and 1926 by Henry W. Henshaw, director of the U. S. Biological Survey. The Farlow received this collection in 1956 from the Museum of Comparative Zoology at Harvard. Most of the slides are single-specimen (valve or frustule) mounts. Nearly half of the collection consists of materials from expeditions and collections on which Albert Mann, a friend and Curator of Diatoms at the Smithsonian Institution, had worked. It is thus rich in taxa Mann described and materials from throughout North America and the Pacific region, including Hawaii, The Philippines, Japan, New Zealand, The Galapagos and Peru. Some materials from Russia (Simbirsk), The Bahamas, Barbadoes and Europe are also present.

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