INDEX TO VOLUME 21 



799 



Page 

 Arid region. Extent and volume of 



eolian transportation in 584 



, Extra limital effects of deflation 



of 583 



, Importance of deflative porcess In 585 



, Influence of through - flowing 



streams in 575 



, Initial physiographic conditions 



of the 587, 597 



, Limitations to geologic work of 



water in 571 



, Plains-forming tendency of wind 



action in 581-583 



, Role of the plains flood-sheet in 



572-575 



— United States and northern Mexico, 



General characteristics of.... 567,568 



, Geographic provinces 



of, Map showing 566 



Aridity, Deflation and the relative effi- 

 ciencies of erosional processes 

 under conditions of 565-598 



Arabian desert, The red sands of 643 



Aridity, Eolation under the stimulus 



of 20, 565-598 



Arizona, Pine Creek valley and traver- 

 tine natural bridge in. Views show- 

 ing 335,336 



— , Petrified log natural bridge near 



Adamana 323-325 



Arnold, Ralph, cited on natural bridge 



at Santa Cruz, California 326 



— , Photograph of natural bridge at 



Santa Cruz, California, by 327 



Ascutney mountain, Vermont, The gab- 



bro (with diorite) and diabase of . . 89 



ASHBURNER, C. A., Reference to letter 



on organizing a geological society. 744 



Asia, Extent of the peripheral ranges 



of 192 



— Minor and Syria, Post-Tertiary his- 



tory of the lakes of 20, 755 



— , Significance of the peripheral moun- 

 tain arcs of 190 



— Suess interpretation of the plan of 



183-190 

 Association (American) for the Ad- 

 vancement of Science, Reference 

 to 741 



— of American Geologists, Reference to 740 

 Atlantic coast. Connate waters of the 



24, 774 

 , Magothy formation of the... 30,780 



— (Mid-) ridge. Tertiary crustal move- 



ment in 216-218 



Attica, Indiana, natural bridge over 



Bear creek near 317 



Attleboro, (South) Massachusetts, 

 Some new fossils from the Cam- 

 brian of 76 



Atwood, Wallace Walter, elected Fel- 

 low 3 



Auditing committee. Election of 2 



, Report of 23 



Augusta sandstone natural bridge, 

 Utah, Description of and view 



showing. See plate 19 317-322 



Australia, Tertiary crustal movements 



in 21 



Bad Lands, South Dakota, Natural 



bridge in 315 



Bahia, Brazil, Limestone plains of the 



interior of 790 



Bagg, Rufus M., Jr. ; Pliocene and 

 Pleistocene foraminifera from Cali- 

 fornia 76 



Bailey, Willis, Discussion on the geol- 

 ogy of the Wasatch mountains by. 22 



Page 



Bain, H. F., Discussion of Santa Bar- 

 bara county stratification by 793 



— , elected Councillor 794 



Baird, Halberstadt, elected Fellow... 3 



"Baltic Shield (The)," Reference to.. 245 



Bancroft (Ontario) nephelite syenite, 



Area of 90 



Barite deposits of Five Islands, Nova 



Scotia ; Charles H. Warren 33, 786 



Barlow, A. E., cited on nephelite sye- 

 nite fields of eastern Ontario.. 91,113 



— , Discussion on origin of the alka- 

 line rocks by 32 



Barrell, .Joseph, cited on geological 



importance of sedimentation 525 



— , Discussion on Post-Tertiary history 

 of the lakes of Asia Minor and 

 Syria by 20, 756 



types of sand grains by... 25,775 



— , Q'loted on distinction between aeo- 



lian and aqueous deposits . ". 642 



— , Reference to decomposition under 



aridity 631, 632 



Barrois, Charles, elected Correspond- 

 ent 4 



Barus, Carl, Reference to studies on 



accurate high temperature scale of. 141 



BASiN-range type of mountains, Occur- 

 rence of 543, 544 



Basix ranges, Types of ancient struc- 

 tures of the 550-555 



Basins, Characteristics of glacier junc- 

 tion 721 



Bassler, R. S. ; Adequacy of the Pale- 



ontologic record 73 



— , elected Secretary Paleontological 

 Society vice H. F. Cleland, re- 

 signed 72 



Bastin, Edson Sunderland, elected Fel- 

 low 3 



Bates, H. W., quoted on ant structures. 473 



ants of the Amazon valley .... 454 



Batholith of British Columbia and 



Alaska, Subalkaline coast range. . . 90 



Bathy metrical chart of the oceans. 



After Sir John Murray ; plate 4. . . 217 



Bathyrcllus cf. fraternus Billings, Fos- 

 sil of the quartzite at Geneva.... 527 



— sp.. Fossil of the quartzite at Gen- 



eva 527 



Bathyrus ? congencris, Fossil of the 



quartzite at Geneva 527 



Bayliss, John Y., quoted on work of 



white ants 491 



Beach cusps, Artificial 615 



, Characteristics of 599-615 



, Common occurrence of 600 



; D. W. Johnson 27, 599-624 



— ■ — , Diagram illustrating the forma- 

 tion of 602 



— — , Figures showing variations in the 



forms of 605, 606, 608, 612 



, Literature of 600-604 



; M. S. W. Jefferson 26 



— • — , Relation to other beach forms 



of 612, 613 



— ■ ■ factors of shore activity 



of 613-615 



, Size, spacing, and formation 



of 607-612 



— — , Theories of origin of 615-623 



"Beaches and Tidal Marshes of the At- 

 lantic Coast ;" N. S. Shaler ; Refer- 

 ence to 600 



— , Isobases of the Algonquin and Iro- 

 quois 21, 227-248, 761 



Bear creek, near Attica, Indiana, Nat- 

 ural bridge over 317 



