weeks.] PALEONTOLOGY, PETKOLOGY, AND MINEKALOGY, 1901. 141 
Petrology— Continued. 
Rocks described— Continued . 
Diorite-porphyry, Cross, 176. 
Dolomite, Newland, 565. 
Essexite, Dresser, 242. 
Felsite, Wilson, 838. 
Foyaite, Washington, 783. 
Gabbro-diorite, Dresser, 241. 
Gabbro-diorite, Leonard, 491. 
Gneiss, Gordon, 296. 
Granite, Darton and Keith, 200. 
Granite, Finley, 272. 
Granite, Hawes, 349. 
Granite, Peck, 590. 
Granite, Watson, 787, 789, 791. 
Granite, Wilson, 838. 
Granite-gneiss, Darton and Keith, 200. 
Granite-porphyry, Spurr, 724. 
Hornblende-andesite, Spurr, 724. 
Hornblende-biotite-quartz-diorite, Spurr, 724. 
Hornblende-syenite, Le Roy, 492. 
Hornblendite, Spurr, 724. 
Hydromagnesite, Newland, 565. 
Hypersthene-gabbro, Leonard, 491. 
Ijolite, Washington, 783. 
Jacupirangite, Washington, 783. 
Limburgite, Stevens, 728. 
Limonite, Newland, 565. 
Magnesite, Newland, 565. 
Melaphyre, Burr, 97. 
Monzonite, Cross, 176. 
Monzonite, Pirsson, 617. 
Nepheline-syenite, Miller, 550. 
Nordmarkite, Dresser, 242. 
Norite, Leonard, 491. 
Ophiealcite, Dresser, 241. 
Peridotite, Leonard, 491. 
Perkinte, Turner, 745. 
Pulaskite, Dresser, 242. 
Pulaskite, Washington, 783. 
Pyroxenite, Leonard, 491. 
Quartz-porphyry, Le Roy, 492. 
Rhyolite, Ordonez, 573. 
Rhyolite, Spurr, 724. 
Serpentine, Dresser, 241. 
Serpentine, Leonard, 491. 
Serpentine, Newland, 565. 
Serpentine, Peck, 590. 
Shonkinite, Pirsson, 616, 617. 
Shonkinite, Weed and Pirsson, 798. 
Spherulite, Parkinson, 586. 
Syenite, Peck, 590. 
Syenite, Pirsson, 617. 
Syenite, Weed and Pirsson, 798. 
Syenite-porphyry, Cross, 176. 
Thaumasite, Penfield and Pratt, 602. 
Tremolite, Peck, 590. 
Physiographic geology. 
Alaska. 
Physiography of the Copper River basin, 
Spencer, 717. 
Appalachiari region. 
Base leveling and its faunal significance, 
Adams, 2. 
Charleston folio, Campbell, 105. 
Current notes on physiography, Davis, 208, 
211, 214. 
Physiograrhic geology — Continued. 
Appalachian region— Continued. 
Geology of the Tallulah gorge, Jones, 406. 
Maynardville folio, Keith, 411. 
Paleozoic Appalachia, Willis, 831 
Atlantic coast region. 
Current notes on physiography, Davis, 217. 
Washington folio, Darton and Keith, 200. 
Canada. 
Ancient channels of Ottawa River, Ells, 260. 
Current notes on physiography, Davis, 209, 
221, 222. 
Exploration of northern side of Hudson 
Strait, Bell, 57. 
Exploration of south shore of Hudson Strait, 
Low, 499. 
Geography of Red River Valley, Dowling, 237. 
Geology of the Three Rivers map sheet, Ells, 
256. 
Geology of west shore of Lake Winnipeg, 
Dowling, 236. 
Geology of Yellow Head Pass route, McEvoy, 
516. 
Iron ores of Nipissing district, Miller, 551. 
Lake basins in Alberta and British Columbia, 
Parkinson, 587. 
Physical geology of central Ontario, Wilson, 
839. 
Physiography of Acadia, Daly, 190. 
Report on parts of Manitoba and Keewatin, 
Tyrrell, 747. 
Great Basin region. 
Grand Canyon of the Colorado, Davis, 202. 
Great Lakes region. 
Ancient drainage at Niagara Falls, Currie, 183. 
Current notes on physiography, Davis, 211. 
Geology and paleontology of Niagara Falls, 
Grabau, 306. 
Ontario coast, Martin, 526. 
Physical history of Niagara River, Gilbert, 293. 
Physiography of Wisconsin, Collie, 158. 
Wisconsin shore of Lake Superior, Collie, 157. 
Great Plains region. 
Current notes on physiography, Davis, 221. 
Flint hills of Kansas, Mead, 540. 
High plains and their utilization, Johnson, 
404. 
Report of Geological Survey, Babcock, 34. 
Mexico. 
Geographic and geologic features of Mexico, 
Hall, 373. 
Mississippi Valley region. 
Geology of Clay and O'Brien counties, Mac- 
bride, 510. 
Geology of Louisa County, Iowa, Udden, 748. 
Geology of Marion County, Miller, 548. 
Geology of Page County, Iowa, Calvin, 100. 
Geology of Pottawattamie County, Iowa, 
Udden, 749. 
Lakes of Indiana and their marl deposits, 
Blatchley and Ashley, 69. 
Preglacial drainage in southwestern Ohio, 
Tight, 740. 
When was the Mississippi River Valley 
formed?, Farnsworth, 266. 
New England and New York. 
Connecticut rivers, Hobbs, 379. 
