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Vol. XVI. No. 12.

YEARLY SUBSCRIPTION, $4.00

PAGE

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Geology and Paleontology. A Fossil Croatian Whale (Mesocetus agrami).-Origin of the Prairies.Davis' Classification of Lake Basins.-Collett's Geology of Indiana for 1881.-Two new Genera of Mammalia from the Wasatch Eocene.-White Carboniferous Invertebrate Fossils of New Mexico.-Geological News 1027 Mineralogy-Some New Minerals in Meteorites.Corundum and its Alterations.-The Paragenesis of Minerals. A mountain of Martite.-Analysis of Helvite.

Geography and Travels.-Proceedings of the Geographical Section of the British Association.-Pogge and Wissmann.-African Exploration.

Microscopy..-Taylor's Freezing Microtome.-Relation of Aperture and Power.-Visibility of Fine Rulings-Cutting Sections of Coal.-Microscopical Diagnosis.-The House-fly as a Carrier of Contagion.Recent Microscopical Papers SCIENTIFIC NEWS. . . .

PROCEEDINGS OF SCIENTIFIC SOCIETIES.

MCCALLA & STAVELY,

PUBLISHERS,

PRINCIPAL OFFICE,

NOS. 237-9 DOCK STREET. PHILADELPHIA.

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WALKER PRIZES IN NATURAL HISTORY.

The BOSTON SOCIETY OF NATURAL HISTORY offers a first prize cf from $60 to $100, and a second of $50, for the best memoir, in English, on the following subject: For April, 1883. Original unpublished investigations respecting the Life-history of any animal. Prizes will not be awarded unless the papers are deemed of adequate merit.

EDWARD BURGESS, Secretary.

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