Authors' Catalogue. 201 
Ordonez, Ezequiel. 
Note sur les gisements d'or du Mexique. (Mem. de la Sociedad 
"Alzate" de Mexico, t. 11, pp. 217-240, 1898.) 
Osborn, H. F. 
Wasatch and Bridger beds in the Huerfano lake basin. [Ab- 
stract.] (Proc. A. A. A. S., vol. 46, pp. 205-206. June 1898.) 
Pench, Albrecht. 
Changes of level in the glacial formations of the Alps. [Abstract.] 
(Proc. A. A. A. S., vol. 46, pp. 203-204, June 1898.) 
Putnam, F. W. 
Early man of the Delaware valley. [Abstract.] (Proc. A. A. A. 
S., vol. 46, pp. 344-348, June 1898.) 
Rice, W. N. 
A suggestion in regard to the theory of volcanoes. [Abstract.] 
(Proc. A. A. A. S.. vol. 46, pp. 199-200. June 1898.) 
Ries, Heinrich. 
Note on a beryl crystal from New York city. (Trans. N. Y. 
.A.cad. Sci., vol. 16. pp. 329-330, 1898.) 
Ruedemann, R. 
The discovery of a sessile Conularia. (15th Ann. Rept. State Geol. 
of N. Y., pp. 699-728, pis. 1-4.) 
Salisbury, R. D. 
On the origin and age of the relic-bearing sand at Trenton, N. J. 
[Abstract.] (Proc. A. A. A. S., vol. 46, pp. 350-355, June 1898.) 
Stevenson, J. J. 
Notes on the geology of the Bermudas. (Trans. N. Y. Acad. Sci., 
vol. 16, pp. 96-124. pis. 8-10, 1898.) 
Taylor, F. B. 
Some features of the recent geology around Detroit. [Abstract.] 
(Proc. A. A. A. S., vol. 46, pp. 201-202, June 1898.") 
Upham, Warren. 
Fjords and submerged valleys of Europe. (Am. Geol., vol. 22, pp. 
101-108, Aug. 1898.) 
Wadsworth, M. E. 
The origin and mode of occurrence of the lake Superior copper- 
deposits. (Trans. Am. Inst. Min. Eng., Lake Superior meeting. July, 
1897; 28 pp.) 
Wadsworth, M. E. 
[Note on zirkelite.] (Jour. Geol., vol. 6, pp. 417-418, May-June 
1898.) 
Warren, C. H. 
Mineralogical notes. (Am. Jour. Sci., ser. 4, vol. 6, pp. 1 16-124, 
Aug '898.) 
Washington, H. S. 
Solvsbergite and tinguaite from Essex county, Mass. (Am. Jour. 
Sci., ser. 4, vol. 6, pp. 176-187, Aug. 1898.) 
