Authors' Catalogue. 191 
Rogers, A. F. 
Sphalerite crystals of a peculiar habit and with one new form, from 
Galena, Kansas. (Am. Jour. Sci., vol. 9, pp. 134-136, Feb., 1900.) 
Rowley, R, R. 
New species of crinoids, blastoids and cystoids from Missouri. 
(Am. Geo!., vol. 25, pp. 65-75, Feb., 1900.) 
Salisbury, R. D. (and Alden, W. C.) 
The geography of Chicago and its environs. (Geog. Soc. of Chi- 
cago, Bull. No. I, 64 pp., 1899.) 
Simonds, Frederic W. 
A consideration of the interpretation of unus&al events in geologic 
records, illustrated by recent examples. (A. A. A. S., vol. 48, p. 227, 
1899.) Abstract. 
Siocum, Chas. E. 
The relative ages of the Maumee Glacial lake and the Niagara 
gorge. (A. A. A. S., vol. 48, p. 227, 1899.) Abstract. 
Spencer, A. C. 
Devonian strata in Colorado. (Am. Jour. Sci., vol. 9, pp. 125-133. 
Feb., 190Q.) 
Schuchsrt, Charles (and John M. Clarke) 
The nomenclature of the New York series of geological forma- 
tions. (Am. Geol., vol. 25, pp. 114-119, Feb., 1900.) 
Taylor, Frank B. 
The Gait moraine and associated drainage. (A. A. A. S., vol. 48, 
p. 228, 1899.) Abstract. 
Todd, J. E. 
New light on the drift in South Dakota. (Am. Geol., vol. 25, pp. 
96-106. Feb., 1900.) 
Upham, Warren. 
Glacial and modified drift in Minneapolis, Minn. (A. A. A. S.. 
vol. 48, p. 229, 1899.) Abstract. 
Upham, Warren. 
The greatest area and thickness of the North American ice-sheet. 
(A. A. A. S., vol. 48, p. 230, 1899.) Abstract. 
Ward, Henry A. 
The Ward-Coonley collection of meteorites. Pages 100, 6 plates, 
Chicago. 1900. 
Weed, Walter Harvey. 
Granite rocks of Butte, Mont., and vicinity. (Jour. Geol., vol. 7, 
PP- 737-7.SO, Nov. -Dec, 1899.) 
Whitfield, R, P. ' * 
List of fossil types and figured specimens used in the paleonto- 
logical work of R. P. Whitfield, showing where they are probably 
to be found at the present time. (Annals N. Y. Acad. Sci., vol. 12, 
pp. 139-186, Nov. 15, 1899.) 
Wright, Geo. F. 
Correlation of the glacial deltas in the lower part of the Delaware 
and Susquehanna rivers. (A. A. A. S., vol. 48, pp. 359-361, 1899.) 
