Volume 12, Number 1 (1944)

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A Suggestion As To The Cause Of Glaciation: The Reciprocal Reinforcement Theory
John D. Boon Sr.

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Dr. David Porter Smythe, An Early Texan Botanist
S. W. Geiser

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Natrix As A Predator Of Fish In The Dallas Area
Pierre Fontaine

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The Nymph of Enallagma basidens Calvert (Odonata, Coenagrionidae)
Alice Ferguson

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A New Form Of Hesperia Metea Scudder From Texas (Lepidoptera Hesperiidae)
H. A. Freeman

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Horizon Angle and Its Relation To the Altitude of the Observer
John D. Boon Sr.

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William Douglas Wallach, Pioneer Hydrographer Of Texas
S. W. Geiser