INDEX TO VOLUME 33 



859 



Page 



Ordovicic formations of north China ; 



A. W. Grabau 202 



Ore deposits of Leadville, Colorado ; 



G. F. Loughlin 149, 225 



Oregon, Marsupial from John Day Oli- 



gocene of 189 



Oreodon beds of the South Dakota Big 



Badlands 155 



Organization of Pennsylvanian anthra- 

 cite and the peat hypotheses of the 

 origin of coal ; E. C. Jeffrey 149 



Oriskany formation of Oklahoma ; C. 



Schuchert 151, 665 



Osborn, H. F., and C. A. Reeds ; Old 

 and new standards of Pleistocene 

 division in relation to the prehis- 

 tory of man in Europe 140, 411 



— ; Phylogeny and nomenclature of the 



Proboscidea 215 



Paige, S., C. R. Longwell, H. D. 

 Miser, and R. C. Moore ; Geology 

 of the Colorado River, southeast- 

 ern Utah 122 



Palache, C. ; Some problems of min- 

 eral genesis in South Africa ; Presi- 

 dential address by 229 



Paleopathology, Sketch of 197 



Paleontological Society, Election of 



officers and members of the 195 



, Proceeding's of 191 



— • — •, Report of Council of 193 



Paleozoic corals, Unattached simple. . 201 

 Paleozoic-Mesozoic contact through- 

 out Wyoming ; S. H. Knight 155 



— ■ systems, Revision of the 112 



Parichnos of Bertrand 208 



Parsons, A. L. ; Analcite from Nova 

 Scotia, with a discussion of anal- 

 cite analyses in general 230 



— ; Care of museum specimens 230 



— and T. L. Walker ; Tubular amyg- 



daloid from Nova Scotia 126 



Pawtuckaway Mountains, Geology of. 128 



Pawnee Creek beds 211 



Payette formation 203 



Peat hypotheses of origin of coal 149 



Peck, A. B. ; New source of monochro- 

 matic light 230 



Peneplains and the geographical cycle; 



W. M. Davis 121, 581 



Pennsylvania anthracite, Origin of . . . 149 



— , Crystalline schists of 110 



— , White chlorite from 229 



Pennsylvanian faunas of north Texas 



and their correlation ; R. C. Moore. 199 

 Penrose, R. A. F., Jr. ; The Society of 

 Economic Geologists — its sphere 

 and future ; Presidential address by 224 

 Permian insects of Kansas, Environ- 

 ment of 153 



— of west Texas, Cavern deposits in 



the -■ 153 



Petrographic notes on the Franklin, 



New Jersey, zinc ores ; W. C. Bowen 225 



— studies of some New York sediments ; 



H. L. Ailing 107 



Petroleum geology, Reflected hills in. . 226 



— •, Improved methods of extracting. . . . 224 



— mining. Use of foraminifera in deter- 



mining underground structure in . . 145 

 Petrology : Graphic study of igneous 



rock series 617 



Phyllite, Age of the Talladega 151 



Phylogeny and nomenclature of the 



Proboscidea ; H. F. Osborn 215 



Pines of the Mesozoic and their rela- 

 tionship to older and more modern 

 types ; E. C. Jeffrey 204 



Page 

 Planetesimal hypothesis, Astronom- 

 ical .tests of the 140 



Plea for economic mineralogy ; O. 



Bowles 229 



Pleistocene division, Old and new 



standards of 411 



— history of lower Mohawk and middle 



Hudson region 117, 515 



— lakes of the Basin-and-Range prov- 



ince 118, 541 



— , Transgressions, regressions, and 



shoreline displacements during the 140 



— ■ subdivisions, Old and new standards 



of 140 



— -vertebrate faunas, Discussion of.... 156 



Policy Committee of the Council, Re- 

 port of 136 



Possible habits of Cephalopods and 



trilobites ; P. E. Raymond 197 



— ■ tillite at Levis, Quebec ; R. W. Sayles 99 



Powers, S. ; Reflected hills in petro- 

 leum geology 226 



Precious stones, Geological and geo- 

 graphical occurrence of 226 



Preliminary notes on some regularly 

 banded argillites which suggest 

 seasonal deposition ; R. W. Sayles 133 



■ — -the shoreline of glacial lake 



Nashua, near Fitchburg, Massachu- 

 setts ; T. C. Brown 118 



Prehistory of man in Europe 411 



Pre-Pennsylyanian rocks of Virginia. 98 



Presentation of loving cup to B. K. 



Emerson 134 



Presidential address by J. F. Kemp. . 



113, 231 



— -R. A. F. Penrose, Jr 224 



C. Palache 229 



— T. W. Stanton 255 



Primary native silver ores near Wick- 

 enburg, Arizona, and their bearing 

 on the genesis of the silver ores of 

 Cobalt, Ontario ; E. S. Bastin 225 



Primitive and carnivore-like characters 

 of the Merychoidodontidre ; M. R. 

 Thorpe 212 



Probable occurrence of massive troilite 



in serpentine ; A. S. Eakle 188 



— ■ origin of certain vein structures ; 



L. C. Graton 224 



Proboscidea, Phylogeny and nomencla- 

 ture of the 215 



Proceedings of the First Annual Meet- 

 ing of the Society of Economic 

 Geologists, held at Amherst, Massa- 

 chusetts, December 28-30, 1921 ; 

 S. H. Ball, Secretary 223 



Second Annual Meeting of the 



Mineralogical Society of America, 

 held at Amherst, Massachusetts, 

 December 29, 1921 ; H. P. Whit- 

 lock, Secretary 227 



— • ■ Thirteenth Annual Meeting of 



the Paleontological Society, held at 

 Amherst, Massachusetts, December 

 28-30, 1921 ; R. S. Bassler, Secre- 

 tary 191 



— ■ — ■ — Thirty-fourth Annual Meeting 

 of the Geological Society of Amer- 

 ica, held at Amherst, Massachu- 

 setts, Wednesday-Fridav, December 

 28-30, 1921 ; E. O. Hovey, Secre- 

 tary 1 



— ■ Twentieth Annual Meeting of 



the Cordilleran Section of the Geo- 

 logical Society of America, held at 

 Berkeley, California, March 26, 

 1921; A. F. Rogers, Secretary 187 



