iv Contents. 
Phosphate-bearing rocks in middle Tennessee — Prelimi- 
nary Notice. .J. M. Safford ■ • 107 
Editorial Comment. — The Columbian Exposition: Notesof Pleistocene 
Geology, 109. 
Review of Recent Geological Literature. — The Canadian lee Age. Sir 
J. W. Dawson, 116. — Post-Glacial Eolian action in southern New 
England, J. B. Woodworth, 122. — The structures, origin and no- 
menclature of the acid volcanic rocks of South Mountain, F. Bas- 
com, 122. — Ueber ein Vorkommnis von Kugelgranit unfern Wirvik 
bei Borga in Finland, Ben.j. Frostkkls, 123.— Geological map and 
table of economic resources of Illinois, D. W. Mead, 123. — Hydro- 
geology of Illinois, D. W. Mead, 123. — La Terre avant l'apparition 
de l'homme, geologie regionale de la France, Fernand Priem, 123. 
-A contribution to the invertebrate paleontology of the Texas 
Cretaceous. F. W. Cragin, 124. — Republication of descriptions of 
Lower Carboniferous Crinoidea from the Hall collection now in 
the American Museum of Natural History, R. P. Whitfield, 121. 
— Ueber Silurische Siphoneen. E. Stolley, 125.— Recent studies of 
the Eurypterina, Malcolm Laurie, 125. 
Correspondence. — Additional Facts about Nicollet, H. V. Winchell, 
126. — Spire-bearing Genera of the Paleozoic Brachiopoda, C. 
Schuchert, 128. 
Personal and Scientific News. — Personal items, 132.— Iowa Academy 
of Science, 133. — Sixth Annual Meeting of the Geological Society 
of America, with notes of papers, 132. 
MARCH NUMBER. 
A median horned Rhinoceros from the Loup Fork Beds 
of Nebraska. J. B. Hatcher Ill* 
New Species of Crinoids and Brachiopods from the Mis- 
souri Hamilton. R. R. Rowley. [Illustrated.].... 151 
The ( 'hemica] Composition of some of the White Lime- 
stones of Sussex county. New Jersey. FRANK L. N.\- 
son. [Illustrated.] 151 
A Bit of Iron Range History. Horace V. Wincheli 161 
Pleistocene History of the Champlain Valley. S. Pren- 
tiss Baldwin.' [Plate V.] ' 170 
Editorial Comment. — The Columbian Exposition: Notes on some Mes- 
ozoic and Tertiary exhibits, 185. 
Review of Recent Geological Literature. — Economic Geology of the 
United States, Ralph S. Tarr, 189. — Geology of the Boston basin: 
Nantasket and Cohasset, W. O. Crosby, 192. — The Cretaceous 
System of Canada, J. F. Whiteaves, 193. — Large Unio-like shells 
in the Coal Measures at the South Joggins. N. S., J. F. Whit- 
eaves. 193. — Eleventh and Twelfth Annual Reports of the New 
York State Geologist, 193.— Om en Hemipter fran Sveriges undre 
Graptolitskiffer, J. C. Molserg, 194.— Evolution of the Brachi- 
opoda, Agnes Crane, 194. — Causes of Magmatic Differentiation, 
Helge Backstroji, 194. — Genetic relationships among Igneous 
Rocks, J. P. Iddings, 195. — Annals of British Geology, 1892, J. F. 
Blake, 195. 
Recent Publications. 196. 
Correspondence. -Some Conditions of Ripple-mark, T. A. Jaggar, Jr.. 
199.— Oscillation and single-current ripple-marks, J. E. Spcrr, 201. 
