Book excerpt: Nearly 100 geologists combine to pro­duce approximately 60 articles in this volume. The essays fall under the general headings of "Carboniferous--General," "Devonian-Mississippian Boundary," "Mississippian--General," "Mississip­pian-Pennsylvanian--Boundary," "Penn­sylvanian--General," "Pennsylvanian -Permian Boundary," and "Permian--General." A sampling of the essays in this vol­ume include "Miospore Zonation of the Carboniferous" by Bernard Owens; "Car­boniferous Small Foraminifers and Strat­igraphy" by B. L. Mamet; "Devonian-­Lower Carboniferous Boundary in Japan" by M. Minato, M. Kato, S. Haga, and H. Takeda; "Mississippian Stratotype--An Overview" by Thomas L. Thompson; "Conodont Succession in the Missis­sippian of South Canada" by Sonny Bax­ter and Peter H. von Bitter; "The Missis­sippian Boundary in North America" by Patrick K. Sutherland and Walter L. Manger; and "Palynological Delineation of the Mississippian-Pennsylvanian Un­conformity in West-Central Pennsyl­vania" by B. R. Wilson, A. Traverse, and I. G. Williams.