724 RECENT PUBLICATIONS: 
—HALL, PROFESSOR C. W. Description of the Keewatin in Minnesota. 
Reprinted from Science, N. S., Vol. X, No. 239, pp. 107-I10. July 28 
1899. 
Exploration for Gold in the Central States. From the Proceedings of 
the Lake Superior Mining Institute, 1898, Vol. V, pp. 49-60. 
—Hay, O. P. On Some Changes in the Names, Generic and Specific, of Cer- 
tain Fossil Fishes. American Naturalist, Vol. XXXIII, No. 394, Octo- 
ber, 1899. Boston, Ginn & Co. 
Descriptions of the Two New Species of Tortoises from the Tertiary 
of the United States. Proceedings of the U. S. National Museum, Vol. 
XXII, No. 1181. Washington, 1899. 
—HILu, Ropert T. The Geology and Physical Geography of Jamaica; 
Study of a Type of Antillean Development. Based upon Surveys made 
for Alexander Agassiz. With an Appendix on Some Cretaceous and 
Eocene Corals from Jamaica. By T. Wayland Vaughan. With Forty- 
one Plates. Bulletin of the Museum of Comparative Zodlogy of Har- 
vard College, Vol. 1V, Cambridge, 1899. 
—Indiana Academy of Science, Proceedings of 1898. Indianapolis, 1899. 
—KING, FRANKLIN HIRAM. Principles and Conditions of the Movements 
of Ground Water. With a Theoretical investigation of the Motion of 
Ground Waters, by Charles Sumner Slichter. Extract from Nineteenth 
Annual Report of the U. S. Geological Survey, 1897-8, Part II. 
Washington, 1899. 
—MANSON, MARSDEN. The Evolution of Climates. From the American 
Naturalist, Vol. XXIV. August, September and October 1899. 
—MERRIAM, HARTC. North American Fauna No. 16. Results of a Bio- 
logical Survey of Mount Shasta, California. U.S. Department of Agri- 
culture. Division of Biological Survey. Washington, 1899. 
—MERRILL, GEORGE P. A Discussion on the Use of the Terms Rock- 
Weathering, Serpentinization, and Hydrometamorphism. From the 
American Naturalist, Vol. XXIV, October 1899. 
—MoseErG, Jon. Cur. Sveriges Alsta Kanda Trilobiter. Aftryck Ur Geol. 
Féren. I Stockholm:Férhandl. Bd. 21.°H.4. Stockholm, 1899. 
—SARDESON, F. W. The Geological Club of the University of Minnesota. 
Reprinted from Science, N.S., Vol. IX, No. 220, pp. 412-413, March 7, 
1899. 
A New Cystocrinoidean Species from the Ordovician. From the 
American Geologist, Vol. XXIV, November 1899. 
