INE, 1896. 
, 4 £> ' " 
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<-> -* 164 
VOL. XVII, No. 6. 
GEOLOGIST 
A MONTHLY JOURNAL OF 
GEOLOGY AIB ALLIED SCIENCES. 
EDITORS AND PROPRIETORS, 
Charles E. Beecher, New Haven , Conn. 
Samuel Calvin, Iowa City , Iowa. 
John H. Clarke, Albany , N. Y. 
Edward W. Claypole, Akron , Ohio. Persifor Frazer, Philadelphia , Pa. 
Francis W. Cragin, Colorado Springs , CWo. Edward O. Ulrich, Newport , JKy. 
John Eyerman, Easton , Pa. Warren Upham, ££. PcmZ, iWmrc. 
Marshman E. Wadsworth, Houghton , .McA 
Israel C. White, Morgantown , IF. Fa. 
Newton H. Winchell, Minneapolis , Jfwm, 
Single Numbers, 35 Cents. 
Yearly Subscriptions, $3.50 
CONTENTS: 
Page 
Log-like Concretions and Fossil Shores, 
J. P. Po<M. [Plate XII.]. 347 
[E Ancestry of the Upper Devonian 
Placoderms of Ohio, E. W. Claypole.. . 349 
JOn the Validity of the Family Bohemilli- 
; D 2 E, Barrande, C. E. Beecher. [Illus— 
! trated.]..:.. 360 
! The Volcanic Tuffs of Segalas (Ariege). 
Conclusions to be Drawn from their 
, . Study on the Subject of the Origin of 
the Ophites, A. Lacroix. .. . 362 
Frozen Streams of the Iowa Drift Border, 
■'Li\ A. G. Wilson... . 364 
Sublacustrine Till, Warren Upham . 371 
Notice of Some Syenitic Rocks from Cali- 
FORNiA, H. W. Turner . 375 
Editorial Comment. 
The Ozarkian Epoch, 389. 
Review of Recent Geological Literature. 
• 
The Saint Peter Sandstone, F. W. Sarde- 
son, 390. — Missouri Geological Survey, 
y^^'Report on Mine la Motte Sheet, C. R. 
•§ • Keyes. 391.—Mjn6ralogie' de la France et 
de ses Colonies, A. Lacroix, 392.—'Prelim- 
Page 
inary Lists of Organic Remains Occurring 
in the Formations of the S. W. Quarter- 
sheet Map of the Eastern Townships of 
Quebec, H. M. Ami, 393.—Mineral Re¬ 
sources of New York State, F. J. H. Mer¬ 
rill, 394.—Annual Report of the Minister 
of Mines of British Columbia, James Ba¬ 
ker, 395.—New Ordovician Genera and 
species of Trilobites, J. Bergeron, 395.— 
Beitrag zur Kenntniss der Trilobiten-Fau- 
na im mahrischen Devon bei Celechovitz, 
F. Smycka, 396.-Ueber angebliche Organ- 
ismenreste aus pracambrischen Schich- 
ten der Bretagne, Hermann Rauff, 396.-- 
Some Notes on the Occurrence of Ur^nite 
in Colorado, Richard Pearce, 396. 
Correspondence. 
The Algonquin and Nipissing Beaches, F. 
B. Taylor, 397.—Beaches of Lakes War¬ 
ren and Algonquin, Warren Upham, 400. 
Recent Publications ... 402 
Personal and Scientific Notes. 
General Notes, 404.—Another Log in a 
Late Glacial Beach, 405.—Geological Map 
of Europe, 405.—Fifteenth Annual Re¬ 
port, U. S. Geological Survey, 406,-r-New 
York Academy of Sciences, 406.—Geolog¬ 
ical Society of Washington, 407. 
THE GEOLOGICAL PUBLISHING COMPANY, MINNEAPOLIS. 
Entered at the Minneapolis Post-office as second-class matter. 
FRANKUIM PRINTING CO., MINNEAPOLIS, MINN. 
