CONTENTS 
TABLE OF CONTENTS 
List oF COUNCIL AND BOARD OF TRUSTEES. 
Papers Pusiisuep. June, 1935 to July, 1938: 
1. 
rs 
she 
a 
Harry S$. Frrcu.—Natural History of the Al- 
ligator Lizards 
D. K. Grecer.—Atrypae of the Central Miss- 
our; Devonian 
SoLtomon Bitinsky.—Outline of a Theory of 
Functions of an Abstract Variable 
Vicror T. AtteN.—Geological Aspects of Ev- 
olution 
Howarp B. Graves, Jr.—The Pre-Cambrian 
Structure of Missouri 
PERCIVAL RORERTSON.— Some Problems of the 
Middle Mississippi River Region pews 
Pleistocene Time 
ia 
43 
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