THE - 
Pan-American 
Geologist 
A Monthly Journal djevoted to Speculativr 
Geology, Constructive Geological Criticism, 
AND Geological Record 
Edited by 
Charles Keyes, Des Moines, Iowa 
Associate Editors: 
Prof. Edward W. Berry, Baltimore, Md. 
Prof. Gilbert D. Harris, Ithaca, N. Y. 
Volume XXXVIII 
PUBLISHED BY 
geological publishing company 
DES MOINES, IOWA 
