21] 



VOLUMES I-X. 



499 



GEOLOGY— 



Paleozoic, thickness of, in Arkansas, 



Branner, 2, 229. 

 Panama, geology. Bertrand, io, 82. 



— and Costa Pica, geology, Hill, 6, 

 435, 505. 



Patagonia, geology of, Hatclier, 4, 

 246, 327; 9, 85; invertebrate 

 fossils from, Ortmann, 10, 368. 



Peat in the Dismal Swamp, depth 

 of, Wieland, 4, 76. 



— bogs of Finland, Andersson, 8, 

 467. 



Petrography of the Boston Basin, 



White, 5* 470. 

 Pflanzenpaleontologie, Potonie, 10, 



88. 

 Phosphate-deposits of Arkansas, 



Branner, 3, 159 ; in Tennessee, 



Safford, 2, 462. 

 Pithecanthropus erectus of Dubois, 



Marsh, 1, 475; Manouvrier, 4, 213. 

 Pleistocene deposits of Chicago area, 



Leverett, 4, 157. 



— glaciation in New Brunswick, 

 etc., Chalmers, 3, 72. 



— marine shore lines, Chalmers, 1, 

 302. 



Pleurotomaria providencis, Broad- 

 head, 2, 237. 



Popocatepetl and Ixtaccihuatl, ob- 

 servations, Farrington, 4, 326. 



Pre-Cambrian fossiliferous forma- 

 tions, Walcott, 8, 78. 



— geology, North America, Van 

 Hise, 2, 205. 



— rocks and fossils, 3, 157. 

 Pre-glacial decay of rocks in East- 

 ern Canada, Chalmers, 5, 273. 



— drainage in Michigan, Mudge, 4, 

 383 ; 10, 158. 



Protoceratidre, principal characters, 



Marsh, 4, 165. 

 Protostegan plastron, Wieland, 5, 



15. 

 Pseudoscorpion, a new fossil, Gei- 



nitz, 4, 158. 

 Eeconnaissance in Oregon, J. S. Dil- 



ler, 3, 155. 

 Road-building stones of Massachu- 

 setts, Shaler, 1, 489. 

 Rock differentiation, Becker, 3, 21. 

 Rocks, flow and fracture as related 



to structure, Hoskms, 2, 213 ; 



fractional crystallization, Becker, 



a. 257 



— See further, ROCKS. 



San Clemente Island, geology, W. 



S. T. Smith, 7, 315. 

 Santa Catalina Island, geology, W. 



S. T. Smith, 3, 351. 



GEOLOGY— 



Saurocephalus. Hay, 7, 299. 

 Sauropodous Dinosauria, Marsh, 6, 



487. 

 Schists of gold and diamond regions 



of Brazil, Derby, 10, 207. 

 Silurian rocks of Britain, Peach and 



Home, 9, 300. 

 Silurian-Devonian boundai'y in N. 



America, H. S. Williams, 9, 203. 

 Silveria formation, Hershey, 2, 324. 

 Slate Belt of Eastern New York and 



Western Vermont, Dale, 9, 382. 

 Species, distribution and origin dis- 

 cussed, Ortmann, 2, 63. 

 Spines, oi'iginof, Beecher, 6, 1, 125, 



249, 329. 

 Stylinodontia, Marsh, 3, 137. 

 Stylolites, Hopkins, 4, 142 

 Stylonurus lacoanus, restoration, 



Beecher, 10, 145. 

 Syrian fossils, Conrad's types of, 



Beecher. 9, 176. 

 Tamiobatis vetustus, Eastman, 4, 



85. 

 Tapirs, recent and fossil, Hatcher, 



1, 161. 

 Tertiary fauna of Florida, Dall, 7, 



71. 



— floras of Yellowstone Park, 

 Knowlton, 2, 51. 



— formations of the Rocky Mts. , 

 Davis, 9, 387. 



— horizons, new marine, Ortmann, 

 6, 478. 



— limestone reefs of Fiji, Agassiz, 

 6, 165. 



— mammal horizons of Europe and 

 America, Osborn, 10, 400. 



Testudinate humerus, evolution, 



Wieland, 9, 413. 

 Trap Rock of Conn., Davis, 1, 1 ; 



of the Palisades, Lyman, 1, 149 ; 



of Rocky Hill, N. J., Phillips, 8, 



267. 

 Trenton rocks, original, White, 2, 



430 ; at Ungava, Whiteaves, 7, 



433. 

 Triarthrus, morphology of, Beecher, 



1, 251. 

 Triassic formation of Connecticut, 



Davis, 8, 76; bivalve from, Emer- 

 son, 10, 58. 

 Trilobites, classification of, Beecher, 



3, 89, 181. 

 Uintacrinus from Kansas, Beecher, 



9, 267. 

 Vertebral centra, terminology, Wie- 

 land, 8, 163. 

 Washington, So. Western, geology, 



Russell, 3, 246. 



