304 J. STANLEY-BROWN INDEX TO VOLUMES 21 TO 30 



Page 

 Vertebrates, New genera of Perniian 21, 75, 250-283 



— of the Pleistocene, Establishment of faunal divisions among the 23, 87 



— , Paleogeographic significance in Paleozoic strata of land ; S. W. Wil- 



liston 22, 94 



— , Problem of correlation by use of 26, 411 



— , Range in typical American formation of land 25, 387 



— , Rise of air-breathing 27, 387 



Vesuvius 26, 37(5 



— , Review of history of 28, 270 



Veta Mountain, Colorado, Rock streams of 21, 26, 063-676, 704 



, Veta peak also called 21, 665 



— peak, Colorado, Absence of glaciated valleys near 21, 665, 666 



; , Description of 21, 665, 666 



plates 21, 675-076 



, Rock streams of 21, 663-676 



— peaks (north and south), Colorado, Composition of 21, 665, 673 



— Rica mine, Sierra Mojada, Coahuila, Mexico, Occurrence of silver, 



copper, and lead ores at the 22, 67, 738 



Vice-Presidents, Election of 21, 2 ; 22, 2 ; 23, 2 ; 24, 9 ; 



25, 5 ; 26, 11 ; 27, H ; 28, 12 ; 29, 11 ; 30, 11 



Vicksburg floras of North America 29, 633 



Vinson, A. E. ; Interesting changes in the composition of the Salton Sea 26, 402 



— introduced by C. F. Tolman, Jr 26, 402 



Virgin Islands, Physiographic features of 27, 41 



Virginia, Age of dikes of central western 24, 334 



— , Camptonite in 24, 321 



— , Chemical analyses of igneous dike rocks from middle western 24, 331 



— , Composition of allanite from 28, 481 



— crj^stalline regions. Association of volcano-sedimentary beds with 



slates of 21, 31, 782 



— dikes, Distribution and geologic field relations of the 24, 306 



— , Distribution of allanite in 28, 475 



— , Formations recognized in central western 24, 305 



— , Granite-f elsophyre in 24, 309 



— , Hyperstheue syenite of the Blue Ridge region 26, 82 ; 27, 193 



— igneous dikes, Contact metamorphism not noted in 24, 308 



, Petrologic relations of rock types to each other 24, 329 



— , Mineralogical and textural characters of igneous dike rocks in ... . 24, 333 

 — , Mississippian delta in 23, 48, 447-455, 743 



— natural bridge, Description of 21, 327 



— , Nepheline syenite in 24, 314 



— , Olivine diabase in 24, 327 



— , Outline map of 27, 195 



— , Paleozoic deposits of the Piedmont in 29, 127 



— , Quartz-gabbro in 24, 313 



— , Reference to limestone region of Bristol 21, 331 



— , Resume of the geology of middle western 24, 303 



— syenite compared to hypersthene syenite 27, 209 



