Authors' Catalogue, 127 
Osborn, H. L. 
The extinct rhinoceroses. (Mem. Am. Mus. Nat. Hist., vol. i, 
pt. 3. pp. 75-164, pis. i2a-20, Apr. 22, 1898.) 
Osborn, H. F. 
The origin of the Mammalia. (Am. NaL, vol. 2>2, pp. 309-334, May 
1898.) 
Osborn, H. F. 
Models of extinct vertebrates. (Science, new ser., vol. 7, pp. 841- 
S45. June 24, li 
Parks, W. A. 
Geology of base and meridian lines in Rainy River district (Rept. 
Bureau of Mines of Ontario, vol. 7, pL 2, pp. 161-183, i map, 1898.) 
Pratt, J. H. 
On the origin of the corundum associated with the peridotites in 
North Carolina. (Am. Jour. Sci., ser. 4, vol. 6, pp. 49-65, July 1898.) 
Prosser, C. S. 
The classification and distribution of the Hamilton and Chemung 
series of central and estern New York. (15th Ann. Rept. State Geolo- 
gist of New York, pp. 83-222, pis. 1-13, i map.) 
Prosser, C. S., and Cumings, E. R. 
Sections and thickness of the Lower Silurian formations on West 
Canada creek and in the Mohawk valley. (15th Ann. Rept. State 
Geologist of New York, pp. 615-659, pis. 1-12.) 
Ransome, F. L. (Turner, H. W., and) 
Description of the Sonora quadrangle. (U. S. Geol. Survey, Geo- 
logic Atlas of the U. S., folio 41, Sonora folio, Calif., 1897.) 
TJuedemann, R. 
On the development of Tetradium cellulosum Hall, sp. (Am. Geol., 
vol. 22, pp. 16-25, pi. ^. July 1898.) 
T?usseII, I. C. 
Geography of the Laurentian basin. (Am. Geog. Soc, Bull., vol. 
30, no. 3, pp. 226-254, 1898.) 
Schuchert, Charles (White, David, and) 
Cretaceous series of the west coast of Greenland. (Geol. Soc. 
Amer., Bull., vol. 9. pp. 343-368, pis. 24-26, June 21, 1898.) 
Sjogren, Ahe, 
Notes on the eastern section of Costa Rica. [In R. T. Hill's paper 
on the istlimus of Panama.] (Bull. Mus. Comp. Zool., vol. 28, Geol. 
ser. vol. 3, no. 5, pp. 281-282, June 1898.) 
Spencer, J. W. 
Niagara as a timepiece. (Canadian Inst., Proc, new ser., vol. i, 
pp. 101-103, May 1898.) 
Spencer, J. W. 
Late formations and great changes of level in Jamaica. (Canadian 
Inst., Trans., vol. 5, pp. 325-357, pis. 1-6, May 1898.) 
