AicthoTs' Catalogue. 385 
Gregory, H. E, 
Andesites of the Aroostook volcanic area of Maine. (Am. Jour. 
Sci., Nov. 1899, pp. 359-370.) 
Hay, C. P. 
A census of the fossil vertebrata of North America. (Science, N. S. 
vol. 10, pp. 681-684, Nov. 10, 1899.) 
Hamilton, S. Harbert. 
Monazite in Delaware county, Pa. (Proc. Acad. Nat. Sci. Phil. 
1899, p. 378.) 
Hidden, W. E. (J. W. Judd.and) 
On a new mode of occurrence of ruby in North Carolina. (Min. 
Mag., London; vol. 12, Oct., 1899, pp. 139-150; also Am. Jour. Sci., 
Nov., 1899, pp. 370-379-) 
Hershey, Oscar H. 
Archeological notes on Central Minnesota. (Am. Geol. vol. 24, 
Nov., 1899, p. 283.) 
Hovey, E. O. (R. P. Whitfield, and) 
Catalogue of the types and figured specimens in the paleontological 
collection of the geological department of the American Museum of 
Natural History. (Bull. Am. Mus. Nat. Hist., vol. 11, pp. 74-188, Oct., 
1899.) 
Judd, J. W. (and W. E. Hidden.) 
On a new mode of occurrence of ruby in North Carolina. (Min. 
Mag., London; vol. 12, Oct. 1899, pp. 139-150; also Am. Jour. Sci., Nov. 
1899, PP- 370-379- ) 
Keyes, C. R. 
On stratification planes. (Am. Geol. vol. 24, Nov. 1899, p. 294.) 
Knight, Wilbur C. 
Some new data for converting geological time into years. (Sci- 
ence, vol. 10, p. 607, Oct. 27, 1899.) 
LeConte, Joseph. 
The Ozarkian and its significance in theoretical geology. (Jour. 
Geol., Sept.-Oct., 1899, pp. 525-545) 
McBeth, Wm. A. 
An elevated beach and recent coastal plain near Portland, Maine. 
(Proc. Ind. Acad. Sci., 1898, p. 72,) 
McCallie, S. W. 
Preliminary report on the artesian well system of Georgia, Bull. 7 
Geol. Sur. Ga.; pp. 214 plates, maps and figures, Atlanta, 1898. 
Mclnnes, Wm. 
Report (3n the geology of the area covered by the Seine River and 
Lake Shebandowan map-sheets, comprising portions of Rainy River 
and Thunder Bay districts. (Geol. Sur. Can., Ann. Rep., vol. 8, Part 
H,.map, pp. 65, Ottawa, 1899.) 
