THE 
PAN-AMERICAN GEOLOGIST 
A Monthly Journal d£voted to Speculative 
Geology, Constructive Geological Criticism, 
AND Geological Record 
Edited by 
Charles Keyes, Des Moines, Iowa 
Associate Editors : 
Prof. Edward W. Berry, Baltimore, Md. 
Dr. Henry S. Washington, Washington, D. C. 
Prof. Gilbert D. Harris, Ithaca, N. Y. 
Manuscripts. All articles and notes should be addressed to the Editor, 
Charles Keyes, 944 Fifth Avenue, Des Moines, Iowa. Galley proofs will 
be sent to authors when request accompanies manuscript; but publication 
cannot be delayed because of failure to return same promptly. 
Separata. Contributors of leading articles will be usually entitled to 
receive 50 copies of reprints gratis when request to that effect is made in 
advance of galley proofs, but there will be a cost-charge for covers. 
When more than the gratis number of reprints is desired actual cost 
figures will prevail, at approximately the following rates: 
Pages 
4 
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3.75 
5.25 
7.40 
8.60 
11.50 
14.00 
300 
copies 
4.00 
6.50 
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10.80 
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Printing of plates will be extra, at actual cost 
Remews. Books and pamphlets for review or notice should be sent to 
the Geological Publishing Company, care of the Editorial Department. 
Subscription. The magazine is Issued monthly, except June and July. 
There are two volumes per year, each containing about 500 pages. Price 
is $2.50 per volume; or 60 cents a number. Add for postage to Canada, 
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Union the added postage is 70 cents per year, or 11 cents a number. 
Back Numbers of the old American Geologist, in complete sets, 36 
volumes, unbound, comprising volumes I to XXXV, volume XXXVI com¬ 
plete index to the series, and the two volumes of the new magazine for 
the current year, 38 volumes in all, $80.00. American Geologist, odd vol¬ 
umes, $2.25 each; single numbers 35 cents. 
