240 ADDITIONS TO THE LIBRARY. 



sive Origin of tlie Watchimg Traps of New Jersey, 562. — W. Upham. 

 The Fiords and Great Lake Basins of North America considered as 

 evidence of Preglacial Continental Elevation and of Depression during 

 the Glacial Period, 563. — J. Hail. On the Genus Spirifera and its 

 Interrelations with the Genera Spiriferina, Syringothyris, Cyrtia, and 

 Cyrtina (synopsis), 567. — P. McKellar. On Pot-Holes of Lake Superior 

 unconnected with existing Streams, 568. 



Washington. (New York and Eochester) Geological Society of 

 America. Bulletin. YoL ii. 1891. 

 W. J. McGee. The Appomattox Formation in the Mississippi 

 Embayment, 2.— C. H. Hitchcock. The Eedonda Phosphate, 6. — E. 

 W. Clay pole. The Continents and the Deep Seas, 10. — H. S. Williams. 

 What is the Carboniferous System?, 16. — L. C. Johnson. The Nita 

 Crevasse, 20. — L. E. Hicks. An old Lake Bottom, 25. — C. L. Herrick. 

 The Cuyahoga Shale and the problem of the Ohio Waverley, 31. — Q. F. 

 Becker. The structure of a portion of the Sierra Nevada of California, 

 49. — E. V. D'Invilliers. Phosphate deposits of the Island of Navassa, 75. 

 — A. Winchell. A last word with the Huronian, 85. — P. Bell. The 

 Nickel and Copper Deposits of Sudbury District, Canada, 125. — G. H. 

 Williams. The Silicified Glass-breccia of Vermilion River, Sudbury 

 District, 138. — C. W. Hayes. The overthrust faults of the Southern 

 Appalachians, 141. — H. R. Geiger and A. Keith. The structure of the 

 Blue Ridge near Harper's Ferry, 158. — G. M. Dawson. Note on the 

 geological structure of the Selkirk Range, 165. — B. Willis. Graphic 

 held notes for Areal Geology, 177. — G. F. Becker. Antiquities from 

 under Tuolumne Table Mountain in California, 189. — G. F. Becker. 

 Notes on the Early Cretaceous of California and Oregon, 201. — R. Pum- 

 pelly. The relation of Secular Rock-disintegration to certain transitional 

 Crystalline Schists, 209, — A. Winslow. The Geotectonic and Physio- 

 graphic Geology of Western Arkansas, 225. — W. Upham. Glacial 

 Lakes in Canada, 243. — C. R. Keyes. Stratigraphy of the Carboni- 

 ferous in Central Iowa, 277. — E. Brainerd. The Chazy Formation in 

 the Champlain Valley, 293.— G. H. Williams and C. JR,. Keyes. The 

 Petrography and Structure of the Piedmont Plateau in Maryland, 301. — 

 J. Le Conte. Tertiary and Post-tertiary changes of the Atlantic and 

 Pacific Coasts, 323. — J. E. Wolff. On the Lower Cambrian Age of the 

 Stockbridge Limestone, 331. — H. D. Campbell and W. G. Brown. 

 Composition of certain Mesozoic Igneous Rocks of V'irginia, 339. — W. 

 H. Weed. The Cinnabar and Bozeman Coal Fields of Montana, 349. — 

 A. C. Lane. On the recognition of the Angles of Crystals in Thin 

 Sections, 365.— H. W. Turner. The Geology of Mount Diablo, Cali- 

 fornia, 383.— W. H. Melville. The Chemistry of the Mount Diablo 

 Rocks, 403. — W. M. Davis and S. W. Loper. Two Belts of Fossiliferous 

 Black Shale in the Triassic Formation of Connecticut, 415.— N. H. Bar- 

 ton. Mesozoic and Cenozoic Formations of Eastern Yirginia and Mary- 

 land, 431. — B. K. Emerson. On the Triassic of Massachusetts, 451. — 

 P. M. Foshay and R. R. Hice. Glacial Grooves at the Southern margin 

 of the Drift, 457. — J. W. Spencer. Post-pleistocene Subsidence versus 

 Glacial Dams, 465. — H. M. Ami. On the Geology of Quebec and 

 environs, 477. — R. T. Hill. The Comanche Series of the Texas- Arkansas 

 Region, 503. — Sir J. W. Dawson. Carboniferous Fossils from New- 

 foundland, 529. — T. C. Chamberlin. A proposed system of Chronologic 

 Cartography on a Physiographic Basis, 541. — W. M. Davis. The Geo- 



