Contents. v 
Editorial Comment. 
Croll's Theory Redivivius I74 
Review of Recent Geological Literature. 
Contributions to the Tertiary Fauna of Florida, W . H. Dall, 
179; Geology of the Boston Basin, vol. i. part III, The Blue 
Hills Complex, W. O. Crosby, 179; Notes on the Tellurides 
from Colorado, Charles Palache, 181 ; The Analyses of Italian 
Volcanic Rocks, H. S. Washington, 182; Occurrence of Na- 
tive Lead with Copper and other minerals at Franklin Fur- 
nace, N. J., JV. M. Foote, 182; Occurrence of Sperrylite in 
North Carolina, W. E. Hidden, 182; Thomsonite, Mesolite 
and Chabazite, from Golden, Colorado, Horace B. Patton, 
183; Beitrage zur Burtheiling der Brachiopoden, F. Huene, 
183; Kleine Paleontologische Mittheilungen, F. Huene, 184; 
Action of Ammonium Chloride upon Analcite and Leucite, 
F. W. Clark and G. Steiger, 184; Chemical Study of the Glau- 
cophane schists, H. S. Washington, 184; Mode of Occurrence 
of Topaz near Ouro Preto, Brazil, 0. A. Derby, 185 ; Carno- 
tite and Associated Vanadiferous Minerals in Western Colo- 
rado, W. F. Hillebrand and F. Leslie Ransome, 185 ; A Con- 
tribution to the Natural History of Marl, C. A. Davis, 185; 
Composition of Kulaite, H. S. Washington, 187 ; A Topo- 
graphic Study of the Islands of Southern California, W. S. 
Tangier Smith, 187 ; A Remarkable Marl Lake, C. A. Davis, 
188. 
Correspondence. 
Notes on the Kansas-Oklahoma-Texas Gypsum Hills, Charles 
N. Gould 188 
Monthly Author's Catalogue of American Geological Liter- 
ature 190 
Personal and Scientific News. 
Lake Superior Iron Trade for the j'car 1900, 195 ; Tribute to 
Victoria, 197; Billings Memorial Portrait, 197, etc. 
APRIL NUMBER. 
The Granitic Rocks of Georgia and their Relationships. 
Thomas L. Watson. [Plates XVII-XXIV] 799 
Metamorphic Formations of Northwestern California. Oscar 
H. Hcrshcy 225 
On the Helderbergian Fossils Near Montreal. Canada. Charles 
SchucJicrt 245 
Review of Recent Geological Literature. 
The Calcareous Concretions of Kettle Point, Lambton County, 
Ontario, Reginald A. Daly, 253; The Granitic Rocks of the 
Pike's Peak Quadrangle, Edivard B. Mathezvs, 254; Geology of 
