INDEX TO VOLUME 26 



497 



Page 



NoTHARCTDS Eoccne lemur. Relation- 

 ship to the Adapidae and to other 

 primates of the 419 



OahUj Tertiary rocks of 133 



Obsidian analyses according to methods 

 of Cross, Iddings, Pirsson, and 

 Washington 262 



— from Hrafntinnuhryggur, Iceland ; its 



lithophysai and surface markings ; 



F. E. Wright 255-286 



O'CoNXELLj Maiuorie; a classification 



of aqueous habitats 159 



Officers, Correspondents, and Fellows 



of the Geological Society, 1915.... 117 



— • of the I'acitic Coast Section of the 



Paleontologlcal Society 166 



— raleontological Society 146 



Ogdexsburg-Cantox quadrangle. Paleo- 

 zoic rocks of 287 



Ohio Berea a non-marine formation... 210 



— — sandstone in 96,155,205-216 



— , Natural gas at Cleveland 102 



— ; Olentangy shale and associated de- 

 posits of northern 95 



— • of central 112, 156 



Oil Held, Geology of a portion of the 



McKittrick 169 



— pools of southern Oklahoma and 



northern Texas ; J. N. Gardner. . . . 102 



— shales, iiegional alteration of; David 



White 101 



Oklahoma, Oil pools of southern 102 



Olentangy shale and associated deposits 



of northern Ohio; C. U. StaufiEer. . 95 

 of central Ohio and its strati- 

 graphic signiticance ; A. W. Gra- 



bau 112, 156 



Oligocene and iMiocene faunas of Cali- 

 fornia, Keview of the; B. L. Clark. 416 

 Ontario Bureau of Mines, Classilication 

 and nomenclature of pre-Cambrian 



rocks adopted by 87 



— , Canada, lievisiou of pre-Cambrlan 



classilication in 87 



OoLiTE.s, Theory of production of 58 



OiJUOViciAN ir(jn ores of Wabana, New- 



fouudlaud. r'ossil alga' of the 148 



Ore alterations, Relation of physio- 

 graphic changes to; \V. W. Atwood. 106 



— enrichment, Some chemical factors 



affecting secondary sulphide 393 



Oregon Bureau of Mines and Geology ; 



I. A. Williams 137 



— , Fauna of the Siphonalia Sutterensis 



zone in the Koseburg quadrangle.. 169 

 — , Itcview of the fauna of the Rattle- 

 snake Pliocene of eastern 169 



Organic origin of .some mineral deposits 

 in unaltered Paleozoic sediments ; 



G. Van 1 ngen 85 



Origin of dolomites; F. M. Van Tuyl.. 62 



gypsum deposits, Hypothesis for.. 223 



Monks Mound; A. K. Crook 74 



— — the basins within the hamada of 



the Libyan di-surt ; W. II. llobbs.. 396 



Itocky Mountain phosphate de- 

 posits ; Eliot Blackwelder 100 



iron ores of Kiruna, Sweden; 



R. A. Daly 99 



tufas of Lake Lahontan ; J. C. 



Jones 392 



thick salt and gypsum deposits; 



E. B. Branson 103, 231-242 



Ore deposits, Itole of colloidal migra- 

 tion in 394 



OsBORN, II. F. ; Close of .lurasslc and 

 opening of Cretaceous time in North 

 America 295-302 



Page 



OsBORN, H. F., Discussion of Adapldffi 

 and other Lemuroidea and phylo- 

 geny of the higher primates by ... . 153 



— ■ fossil vertebrate localities of 



Florida by 154 



■ — paleontologic criteria in time 



relations by 411 



■ — Sauropod dinosaurs by 158 



the affinities of the Multituber- 



culata by 152 



— ■ — on the symposium "Correlation of 



the Cretaceous" by 415 



— , Introduction to symposium on the 

 passage from the Jurassic to the 

 Cretaceous by 151 



— - ; Migration and succession of human 

 types of the old Stone age of Eu- 

 rope 149 



— ■, Paleontologlcal Society called to 



order by President 144 



— ■ ; Recent work on the dinosaurs of the 



Cretaceous 416 



— , Resolution that a vote of thanks be 

 tendered by the members of the 

 California Meeting of the Paleonto- 

 logical Society by its Secretary to 

 the American Association for the 

 Advancement of Science, to the 

 President of the University of Cali- 

 fornia, and to the President of 

 Stanford University, in apprecia- 

 tion of courtesies extended to the 

 Society, offered by 417 



— • ; The addition and evolution of "char- 

 acters" in paleontologic phyla 151 



— , Section of vertebrate paleontology 



called to order by President 151 



— , Speaker at annual dinner 104 



— , Session August 6, 1915, California 

 Meeting of the Paleontologlcal So- 

 ciety called to order by 415 



Owen, Sir Richard, cited' on Bothrio- 

 spondylus from the Kimmeridgian 

 of England 331 



Ozarks, Quaternary deformation of . . . . 67 



Pacific Association of Scientific So- 

 cieties, Cordilleran Section met in 

 conjunction with 130 



— Coast Macrida\ Evolution of the. . . . 170 



— — , Relief of our ; J. S. Diller Ill 



— — Section of the Paleontologlcal So- 



ciety 145, 10(; 



-, Stratlgraphie and faunal rela- 

 tions of the later Eocene of the. . . 108 



Packard, E. L. ; Cretaceous faunas of 



the Santa Ana Mountains 10!) 



— ; Correlation between invertebrate 

 faunas of California and those of 

 Mexico 414 



— • ; Evolution of the Pacific Coast 



Macridw ITd 



I'AiGE, Sidney, Discussion of papers 



bearing on ore deposition by 40.". 



— • the term "bajada" by 391 



Paleobotaxic evidence of the age of the 



Morrison formation; E. W. Berry. 



90, 151, 33.". 



Paleograi'hy, Correlation and chronol- 

 ogy on the basis of ; Charles Schu- 

 chert 411 



Paleontological Society, Members de- 

 ceased 105 



, Members-elect 165 



, Ollicers, Correspondents, and 



l\Iembors. 1915, of the 161 



--. I'rocoedings of 141-170 



-. Register of the Philadelphia 

 -Meeting, 1914 160 



