IV Contents. 
Rev ie IV of Recent Geological Literature. — Ueber Porocyetis prunifor- 
mis Cragin, au& der unteren Kriede in Texas, Fritz Pkech, 122. — 
The American Tertiary AphidiB, with a list of the Known Species, 
and tables for their determination, S. 11. Scudder, 123. — Gran- 
ites and Greenstones, a series of Tables for students of Petrology, 
Frank Rutley, 123.— On the Banded Structure of some Tertiary 
Gabbros in the Isle of Skye, Archibald Geikie and J. J. H. 
Teall, 123. 
Recent Publications, 124. 
Correspondence. — "Cephalopod Beginnings," John M. Clarke, 125.— 
Erosion during the deposition of the Burlington Limestone, 
Francis M. Fultz, 128. — Volcanic Ash-bed near Omaha, J. E. 
Todd, 130. 
Personal and Scientific Netvs, 130. 
MARCH NUMBER. 
Development of the Corallum in Favosites forhesi var. 
occidentalis. George H. Girty. [Plates VII and 
VIII] 131 
Earl}^ Protozoa. G. F. Matthew 146 
The Stratigraphic Base of the Taconic or Lower Cam- 
brian. N. H. WlNCHELI 153 
The Second Lake Algonquin. F. B. Taylor. [Illus- 
trated.] 162 
Editorial Comment. — Glacial Geology of Great Britain and Ireland, 180. 
Review of Recent Geological Literature.— On new forms of marine 
Algffi from the Trenton limestone, with Observations on Butho- 
graptuB laxus Hall, R. P. Whitfield, 183. -From the Greeks to 
Darwin, — an outline of the Development of the Evolution Idea, 
H. F. Osborn, ISi. — Preliminary Report on the Geology of South 
Dakota, J. E. Todd, 186. — Summary of Progress in Mineralogy 
and Petrography in 1894, W. S. Bayley and W. H. Hobbs, 186— 
Report of the Geological Survey of Ohio, Vol. VII, Edward Or- 
TON, 187. 
Correspondence. — The Ups and Downs of Long Island, John Bryson, 
188.— The Name of the Copper-bearing Rocks of Lake Superior, 
U. S, Grant, 192. — Drumlin Accumulation, Warren Upham, 194. 
Personal and Scientific News. — Personal items. Scientific meetings, etc., 
195. — Pleistocene Papers at the Baltimore meeting of the Geolog- 
ical Society of America, 197. 
APRIL NUMBER. 
The Stratigraphy of Northwestern Louisiana. T. Way- 
land Vaughan. [Plate IX.] 205 
The Paleontologic Base of the Taconic or Lower Cam- 
brian. N. H. WiNCHELL 229 
The Missouri Lead and Zinc Deposits. James D. Rob- 
ertson 235 
On the Mud and Sand Dikes of the White River Miocene. 
E. C. Case 248 
Editorial Comment. — Secular Changes of Arctic Climate, 254. 
