Volume 78, Number 3-4 (1971)

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Cover - Table of Contents

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Front Matter

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Effects of DDT on the Density and Diversity of Tardigrades p. 41-42
Gary W. Barrett and Ronald G. Kimmel

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A Further Note on Formica Exsectiodes Forel p. 43-43
K. M. Quick and C. L. Christensen

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Petrified Lepidophloios Specimens from Iowa Coal Balls p. 44-47
Nancy Brotzman and Jeffry Schabilion

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Primary Productivity in Lake Red Haw, Lucas County, Iowa p. 48-49
Phyllis J. Kingsbury, Lynda D. Corkum, and Paul D. Krause

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Bacteriological Quality of Lake Red Rock and the Des Moines River Between Des Moines, Iowa, and Lake Red Rock p. 50-56
Dean A. Hoganson and Stephen C. Elliott

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Some Diatoms in Lacustrine Sediments of Pillsbury and Sylvan Lake Beds in Northwest Iowa p. 57-62
James J. Hungerford

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The Effects of Non-Solution Hypotheses on Concept Learning p. 63-64
Marianne McManus

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Chronic Centrifugation of Labyrinthectomized, Growing Turtles p. 65-66
John O. Rice, Charles C. Wunder, Friedrich C. Diecke, Mary M. Clark, Randall K. Kesterson, Jackquelyn G. White, and Kathy M. Whiteside

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The Relationship Between Pond Bottom Type and Growth Rate of Western Painted Turtles Chrysemys picta belli in Iowa, a Preliminary Report p. 67-69
Anthony J. Quinn and James L. Christiansen

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Phyllopods of Missouri p. 70-72
C. Thomas Wiltshire and Donald H. Hazelwood

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Copepoda and Cladocera Populations of Red Rock Reservoir, Iowa from April to November, 1970 p. 73-75
Ronald L. Asch and Phyllis J. Kingsbury

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Faunal Analysis of the Lane Enclosure, Allamakee County, Iowa p. 76-78
John T. Jenkins and Holmes A. Semken

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Distribution of Sculpins (Pisces: Cottidae) in Iowa p. 79-80
Marlin Johnson

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Flora of a Sand Prairie in Black Hawk County, Iowa p. 81-87
Glenn H. Crum

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Editorial Board

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Back Cover - Iowa Academy of Science Board of Directors and Section Chairmen