400 
Index. 
Upper Silurian fauna of the Rio Trom- 
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Udden, J. A., The mccliaiiical composi- 
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:«9. 
V'aughan, T. VVeyland, Geologic notes on 
the Wicliita mountains, Oklahoma, 
and the Arbuckle liills, Indian Terri- 
tory, 44. 
Vogdes, A. W., 325. 
W 
Walker prizes in Natural History, 393. 
Wachsmuth and Springer s Monograph 
on Crinoids, F. A. Bather, 56. 
Warren. C. H., (S. L. Penfield and). On 
the chemical composition of parisite 
and on a new occurrence of it in Mon- 
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Washington, H. S., Petrographical 
province of Essex county. Mass., 255; 
Some analyses of Italian volcanic 
rocks, 321. 
Woodworth, J. B.. 66. 
Walcott, ('. D., Eighteenth annual re- 
port of the U.S. Geol. Survey, 122; 
Eighteenth Annual Report, 251; 324. 
Wei<iman, S., A contribution to the 
geology of tlie Fox River valley, 257. 
White, I. C, Origin of Grahamite, 25:1 
Whiteaves, J. F., the Devonian system 
in Canada, 210. 
Wilder, D. L., 66. 
Willian\s,Jl. S., On the occurrence of 
Paleotrochis in volcanic rocks in 
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Wisconsin Academy of Science, .\rts and 
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Worn', J. E., 66. 
Wood, Edgar, Eruption of Mauna Loa, 
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Woodward, R.S., 392. 
Woodworth, .1. B., Some glacial wash- 
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Zittel, K. von, Geschichte der Geologic 
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Errata for Volume XXIII. 
On page 47. 17th line from the top, for floating read rotating. 
Errata for Volume XXiV. 
On page 118, 8th line from the bottom, for merely read namely. 
On page 176, 16th line from the top, for positively read positive. 
On page 349, in the title, read Bates' Pass. 
