Contents of Volume VI L 



NUMBER I. 



PAGE 



The Lower Rapids of the Mississippi River. Frank Leverett - - i 



The Newark Rocks of New Jersey and New York. H. B. Kiimmel 22 



The Petrographical Province of Essex County, Mass. II. Henry 



S. Washington ----------- 53 



The Sweetland Creek Beds. J. A. Udden ------ 65 



Studies in the Driftless Region of Wisconsin. G. H. Squier - 79 



A Discussion and Correlation of Certain Subdivisions of the 



Colorado Formation. W. N. Logan ------ 83 



Editorial ------------ 92 



Reviews : Fossil Medusae, by C. D. Walcott (Stuart Weller), 99 ; The 



University Geological Survey of Kansas, Vol. IV, Paleontology, 



Part I, Upper Cretaceous, by Samuel W. Williston (W. T. Lee), 100. 

 Recent Publications - 102 



NUMBER II. 



The Petrographical Province of Essex County, Mass. III. Henry 



S. Washington --- 105 



The Distribution of Loess Fossils. B. Shimek - - - - 122 



Granitic Rocks of the Sierra Nevada. H. W. Turner - - - 141 



Studies for Students: The Development and Geological Relations of 



the Vertebrates, PartV — Mammalia (continued). E. C. Case - - 163 



Editorial ------------ 188 



Summaries of Current North American Pre-Cambrian Literature. 



C. K. Leith ----------- 190 



Reviews : Report on the Building and Decorative Stones of Maryland, 

 Maryland Geological Survey, Part 2, Vol. II, by G. P. Merrill and E. 

 P. Mathews (E. R. Buckley), 207 ; Report of the New York State 

 Geologist for 1895, by James Hall (Stuart Weller), 209 ; Iron Making 

 in Alabama, Alabama Geological Survey, Second Edition, 1898, by 

 W. B. Phillips (H. Foster Bain), 213. 



Recent Publications ---------- 214 



