THE 
VOL. XVII, No. s. 
AMERICAN 
GEOLOGIST 
A MONTHLY JOURNAL OF 
GEOLOGY AID ALLIED SCIENCES. 
EDITORS AND PROPRIETORS. 
Charles E. Beecher, New Haven, Conn. 
Samuel Calvin, Iowa City , Iowa. 
John M. Clarke, Albany, N. T. 
Edward W. Claypole, Akron, Ohio. Persifor Frazer, Philadelphia, Pa. 
Francis W. Cragin, Colorado Springs, Colo. Edward O. Ulrich, Newport, Ky. 
John Eyerman, Easton, Pa. Warren Upham, St. Paul , Minn. 
Marshman E. Wadsworth, Houghton, Mich. 
Israel C. White, Morgantown, W. Va. 
Newton H. Winchell, Minneapolis, Minn, 
Single Numbers, 35 Cents. 
Yearly Subscriptions, $3.50 
CONTENTS: 
Page 
The Genus Temnocyon and a New Species 
thereof and the New Genus Hypotem- 
NODON, FROM THE JOHN Day MlOCENE OF 
Oregon , John Eyerman. [Plate XI.].. 267 
Early Pleistocene Deposits of Northern 
Illinois, Oscar H. Hershey . 287 
On a Supposed Discovery of the Antennae 
OF TrILOBITES BY LlNNiEUS in 1759, C. E. 
Beecher. [Illustrated.]... 303 
The Deposition of Gold in South Africa, 
S. Czyszkowski (Translated by H. V. Win- 
JU chell)... 306 
Minerals and the Roentgen Rays, W. G. 
Miller. [Illustrated.]. 324 
Review of Recent Geological Literature. 
Life, Letters and Works of Louis Agassiz, 
Jules Marcou, 325.—A Preglacial Tribu¬ 
tary to Paint Creek and its Relation to the. 
Beech Flats of Pike County, O., W. G. 
Tight , 326.—Studies of Melonites Multi- 
porus, R. T. Jackson and T. A. Jaggar, 
Jr., 326.—Pertrology for Students, Alf red 
Harker, 327.—Report on the Area of the 
1 
Page 
Kamloops map-sheet, British Columbia, 
G. M. Dawson, 327.—Complete Geogra¬ 
phy, A. E. Frye, Supplement, W. M. 
Davis, 328.—Summary Report of the Geol¬ 
ogical Survey of Canada for 1895, G. M. 
Dawson, 328.—Studies of Palaeechinoidea, 
R. T. Jackson, 329.—Expedicion Cientifica 
al Popocatepetl, J. G. Aguilera and Eze- 
quiel Ordonyez, 330.—Notes on the Areal 
Geology of Glacier Bay, Alaska, H. P. 
Cushing , 331.—Neocene Stratigraphy of 
the Santa Cruz Mountains of California, 
G. H. Ashley, 331.—Summary of Progress 
in Petrography in 1895, W. S. Bayley, 335. 
Recent Publications. 
Correspondence. 
The Gold-Quartz Veins of California, 
Waldemar Lindgren, 338. 
Personal and Scientific Notes. 
General Notes, 339.—Maryland Geologi¬ 
cal Survey, 343.—Geological Society of 
Washington, 340.—Academy of Natural 
Science of Philadelphia, 346. 
336 
THE GEOLOGICAL PUBLISHING COMPANY, MINNEAPOLIS. 
Entered at the Minneapolis Post-office as second-class matter. 
FRANKLIN PRINTING CO., MINNEAPOLIS, MINN. 
