VI 
Contents 
Correspondence. — The Gold-Quartz Veins of California, Waldemar 
Lindgren, 338. 
Personal and Scientific News. — General Notes, 339.—Maryland Geolog¬ 
ical Survey, 343. — Geological Society of Washington, 340. — Acad¬ 
emy of Natural Science of Philadelphia, 346. 
JUNE NUMBER 
Log-like Concretions and Fossil Shores. J. E. Todd. 
[Plate XII.] . 347 
The Ancestry of the Upper Devonian Placoderms of 
Ohio. E. W. Claypole. * . 
On the Validity of the Family Bohemillidae, Barrande. 
C. E. Beecher. [Illustrated.]..,. 
The Volcanic Tuffs of Segalas (Ariege). Conclusions to 
be Drawn from their Study on the Subject of the 
Origin of the Ophites. A. Lacroix. ... 
Frozen Streams of the Iowa Drift Border, A. G. Wilson.. 364 
Sublacustrine Till, Warren Upham . 371 
Notice of Some Syenitic Rocks from California, H. W. 
Turner . 375 
Editorial Comment. — The Ozarkian Epoch, 389. 
Review of Recent Geological Literature. — The Saint Peter Sandstone, 
F. W. Sardeson, 390. — Missouri Geological Survey, Report on 
Mine la Motte Sheet, C. R. Keyes, 391.—Mineralogie de la France 
et de ses Colonies, A. Lacroix, 392. — Preliminary 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. — Min¬ 
eral Resources of New York State, F. J. H. Merrill, 394. — Ann¬ 
ual Report of the Minister of Mines of British Columbia, James 
Baker, 495. — New Ordovician Genera and species of Trilobites, 
J. Bergeron, 395. — Beitrag zur Kenntniss der Trilobiten-fauna im 
mahrische Devon bei Celechovitz, F. Smycka, 398.—Ueber ange- 
bliche Organismenreste aus pracambrische Schichten der Bre¬ 
tagne, Herman Rauff, 399.—Some Notes on the Occurrence of 
Uranite in Colorado, Richard Pearce, 396. 
Correspondence. — The Algonquin and Nipissing Beaches, F. B. Taylor, 
397. — Beaches of Lakes Warren and Algonquin, Warren Upham, 
400. 
Recent Publications , 402. 
Personal and Scientific News. — General Notes, 404. — Another Log in a 
Late Glacial Beach, 405.—Geological Map of Europe, 406.—Fif¬ 
teenth Annual Report, U. S. Geological Survey, 406.—New York 
Academy of Sciences, 406.—Geological Society of Washington, 407. 
