IV Contents. 
FEBRUARY NUMBER. 
The Geology of Lincoln County, South Dakota, and adja- 
cent PORTIONS. [Plates II and III.] T. A. Bendrat 65 
Geology under the new Hypothesis of Earth-origin. H. L. 
Fairchild 94 
Editorial Comment. 
The Evolution of Climates 116 
Review of Recent Geological Literature. 
The Geology of Worcester, Mass., /. H. Perry and B. K. 
Emerson, 122; Descriptive Geology of Nevada south of the 
fortieth parallel and adjacent portions of California, /. E. 
Spurr, 122; First Biennial report of the Director of the Agri- 
cultural College Survey of North Dakota, C. M. Hall, 122; 
West Virginia Geological Survey, vol. II, /. C. White, 123; 
Nebraska Geological Survey, E. H. Barbour, 125 ; On the 
• white chalk of the Tullstorp region and the two moraines be- 
tween which it is imbedded. An argument in the intergla- 
cial controversey, N. O. Hoist, 126; Lecture notes on general 
and special mineralogy, F. R. Van Horn 128 
Monthly Author's Catalogue of American Geological Liter- 
ature 129 
Personal and Scientific News 132 
Williston, Clements, Phillips, Geological Society of Wash- 
ington, Chicago Academy of Sciences, New Mexico Academy 
of .^..ciences, United States Geological Survey. 
MARCH NUMBER. 
Conglomerate Dikes in Southern Arizona. M. R. Campbell. 
[Plates IV and V.J 135 
Regulation of Nomenclature in the Work of the United 
States Geological Survey. G. K. Gilbert 138 
Ball's Contributions to the Territary Fauna of Florida. 
Charles Schtichert. 143 
A New Foot-Print from the Connecticut Valley. Jos. A. 
Cushman. [Plate VI.] 154 
Geography in the United St.\tes. JV. M. Davis 156 
Editorial Comment. 
Where did Life begin? 185; Charles Emerson Beecher 189 
Review of Recent Geological Literature. 
The Evolution of Earth structure, with a theory of Geomor- 
phic changes, T. Mellard Readc, 190 ; The planetary system ; 
A study of its structure and growth, F. B. Taylor, 191 ; Les 
roches alcalines caracterisant la Province petrographique d'- 
Ampasindava, A. Lacroix 192 
Monthly Author's C.\talogue of American Geological Liter- 
ature • 193 
