Abstract

PRIMATE FROM THE AMERICAN OLIGOCENE

BY JOHN CLARK

A new species of anaptomorphid primate, based on a jaw collected from the Chadron of southwestern Montana, is here described.

CHESTER INDEX OSTRACODES*

BY CHALMER L. COOPER

Since the discovery of petroleum in the Illinois Basin, considerable attention has been given to criteria for the recognition of the various Chester (Upper Mississippian) formations and their correlation. Since the ostracodes form a large part of Chester microfaunas, the study of them is important to determine their value as index fossils. This paper will trace the varying specific characteristics of a number of Chester ostracode genera through these formations.

POSSIBLE EVIDENCE OF “PRE-HISTORIC” MAN IN SOUTHEASTERN MISSOURI

BY CAREY CRONEIS

The writer, with the assistance of members of various summer field classes, has for a decade been sporadically investigating various geological features of a wide-mouthed cavern in Ste. Genevieve County, Missouri. Because of the . . .

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