INDEX TO VOLUME 20 



739 



Clark, W. B., Coast plain formations 

 between Massachusetts and North 



Carolina (abstract) 646-654 



— , elected Treasurer 616 



— , Reference to 600, 609, 635, 655, 



659, 660, 671, 672, 688, 698 



— , Report of Treasurer 612-614 



— , Response to vote of thanks by '704 



— and M. W. Twitchell, Geological 

 distribution of the Mesozoic and 

 Cenozoic Echinodermata of the 



United States (abstract) 686-688 



Clayton valley, Granite rocks of 250 



Clayton, J. E., cited on diorite dikes., 238 

 — , Fossil fishes of "Esmeralda forma- 

 tion" collected by 244 



Claypole, E. W., Reference to 525 



Cleland, H. F., Some features of the 



Wisconsin middle Devonic 701 



Clements, , Reference to 662 



Climate of Aftonian interval 343 



Coal-bearing rocks, New Mexico, Paper 



by Willis Thomas Lee on. 357-368,621 

 — ■ bed, Annual production from 335 



— beds. Acreage of West Virginia 336 



— — , Duration of Ohio 336 



of Pennsylvania, Area remaining 



of 335 



— • deposits of Appalachian field, Reason 



for absence of 335 



— field of New Mexico, Unconformity 



in the so-called Laramie of the 



Raton 357-367 



— ■ — , The barren zone of the northern 



Appalachian 333 



— fields of the northern Appalachian, 



Duration of 335-336 



— formations of the Raton field, Plate 



showing sections of 362 



— ■ in northern Appalachian coal field, 



Shortage of 333-339 



— ■ of Appalachian field, Method of dep- 

 osition of 335 



— saved and utilized in Pittsburg vein . 336 

 Coke from beehive ovens, Superiority 



of 339 



Coast plain formations, Massachusetts 



to North Carolina 646 



Coleman, A. P., Lake Ojibwa, last of 



the great glacial lakes (abstract). 639 



— .Reference to 134, 670 



Collier, , Reference to 582 



Comanchic formations, Table of Texas. 583 

 Conglomerate basal formations of the 



post-Laramie coal measures, Plate 



showing 363 



— beds of Esmeralda formation 246 



— ■ post-Laramie formations, Descrip- 

 tion of 363 



Conglomerates, Marine and terrestrial, 



paper by Joseph Barrell (abstract) 620 



— , Distinction between marine and 



terrestrial 620 



Connecticut valley, Triassic sandstone 



of 437 



Conrad, , Reference to 682,684 



Conservation, Committee on 633 



— of resources, Need of 338-339 



Contact metamorphism of Silver Peak 



quadrangle 261-263 



Continental region, Subdivision of in- 

 terior 447, 448 



— seas, Depth of 438 



of North America, Classification 



of 480-481 



— — , or negative continental elements. 



447-464 



Cope, E. D., Reference to 348,356,570 



Cordillera, Geology of the 164 



Cordilleran Section, Title of papers 



presented before the 707-710 



Page 

 Costa Sena, Joaquim Candido da, 



elected Fellow 617 



Cotteau, , Reference to 584 



Council. Report of 609 



Cragin. , Reference to 582 



Cretaceous floras of Virginia and 

 North Carolina. Geologic relations 



of 655 



— formations, Table of Massachusetts 



to North Carolina 648 



Cretacic formations, Table of 588 



Crosby, W. O., Reference to 701 



— , Age and geologic relations of the 

 Snnkaty beds, Nantucket, read by 



title 701 



— , cited on veins or dikes of quartz . . . 237 

 Cross, Whitman, Reference to. .. .358, 365. 

 565, 566, 567, 579. 594, 667 

 Crystals, Advantages of new classifi- 

 cation of 385 



— , Axes and planes of symmetry in 374-377 



— . Basis of symmetry in , 371 



— . Characteristics of the seven classes 



of 378-380 



— , Development of groups and classes. 



374-375 

 — , Elementary development of . . . . 381, 385 

 — . Integrity of seven classes of . . . 380, 381 



— , Larger division of 380 



— , Plates 31 and 32, showing classes of 398 



— .Present classification of 370 



— , Proposed classification of 370-397 



— , Relative rank of classes and systems 



of 383-385 



— , Review of the development of the 



thirty-two groups of 385-394 



— , Summary of proposed classification 



of 397-398 



— . Table of groups of 396 



— larger divisions of 395 



— . Theorems for basis of classification 



of 372-373 



— , Types of symmetry 374 



Cullis, C. G., cited on deposits made 



in Funafuti corals 168 



Cumings, Edgar R., Reference to 530, 



672, 699 



Cummins, , Reference to 561,570 



Clrrie. P.. Reference to. 370,385,386,391 

 Currents as fauna distributors... 442-445 

 Curtis, G. S., Reference to... 418,419,420 



Cushing, H. P., elected Librarian 616 



— , Librarian, List of societies, institu- 

 tions, and others receiving the Bul- 

 letin as donation 711-720 



— , Reference to 630, 632 



— , Report of Librarian 615 



Dana, Edward Salisbury, elected Fel- 

 low 



Dana. .Tames D.. cited on Paleozoic 



positive elements 464. 



469, 471, 



— .cited on strand-line displacements.. 



—.Reference to works of . . . . 384, 431, 



433, 437, 447, 448, 450, 451, 453, 



456, 457. 460, 462, 464, 467, 470, 



475, 484, 488, 501, 505, 



Dall, W. H., Conditions governing the 

 evolution and distribution of Ter- 

 tiarv faunas 



— . Reference to 430, 444, 445, 463, 



Daly, Reginald A., First calcareous fos- 

 sils and the evolution of the lime- 

 stones 153-168, 



— . Reference to 



Daxgerous mining zones, Locations of. 



Darton, N. H., Reconnaissance in Ari- 

 zona and western New Mexico along 

 the Santa F6 railroad 



617 



465, 

 472 

 475 

 432, 

 454, 

 474, 

 509 



704 



597 



620 

 572 

 337 



700 



