466 RECENT PUBLICATIONS 



— Watson, T. L. Lead and Zinc Deposits of Virginia. [Geological Survey 

 of Virginia, Geological Series, Bulletin No. i, 1905.] 



— Webster, Clement L. I: Preliminary Observations on Some of the Con- 

 stituent Elements of the Glacial Drift of Northern Iowa. II: On Some 

 Species of Fossils from the Hackberry Group of Iowa. III. Description 

 of a New Genus of Gastropod from the Hackberry Group of Iowa. IV: 

 Description of a New Genus and Species of Gastropod from the Hackberry 

 Group of Iowa. V: Contributions to the Paleontology of the Iowa Devon- 

 ian. [Iowa Naturalist, Vol. I, Nos. 2, 3, and 4, April, July, and October, 



1905-] 

 — Weed, Walter H. Translation of "The Nature of Ore Deposits," by Dr. 



R. Beck. [Engineering and Mining Journal, 1905; pp. 685, 272 figures, 



and map; cloth, 2 vols.] 

 — Whitfield, R. P. Descriptions of New Fossil Sponges from the Hamilton 



Group of Indiana. Bulletin of American Museum of Natural History, 



Vol. XXI, Article XVII, pp. 297-300; New York, October 25, 1905.] 

 -Notice of a New Species of Fasciolaria from the Eocene Green Marls at 



Shark River, N. J. [Bulletin of American Museum of Natural History, 



Vol. XXI, Article XVIII; October 20, 1905.] 

 -Wieland, G. R. Structure of the Upper Cretaceous Turtles of New Jersey. 



[Extract from American Journal of Science, Vol. XX, pp. 430-44, 9 figures; 



December, 1905.] 

 Structure of the Upper Cretaceous Turtles of New Jersey: Lytoloma. 



[Extract from the American Journal of Science, Vol. XVIII, pp. 183-95; 



4 plates; September, 1904.] 

 The Proembryo of the Bennettiteae. [Extract from American Journal 



of Science, Vol. XVIII, pp. 445-47; December, 1904.] 

 -A New Niobrara Toxochelys. [Extract from American Journal of Science, 



Vol. XX, pp. 325-43; November, 1905.] 

 -Williams, Ira A. Geology of Jasper County. [Iowa Geological Survey, 

 Vol. XV, Annual Report, 1904, pp. 277-367, 1905.] 

 -The Comparative Accuracy of the Methods for Determining the Percen- 



tages of the Several Components of an Igneous Rock. [American Geologist, 

 January, 1905; pp. 34-46.] 



-WiLUS, Bailey. Reports on Geological Investigations; Geological Explora- 

 tion in Eastern China — Studies in Europe — Geological Research in Con- 

 tinental Histories — Artesian Water Conditions at Pekin, China. [Extract 

 from Fourth Year Book of Carnegie Institute of Washington, pp. 192-220; 

 Washington, 1906.] 



-WooDWORTH, J. B. Ancient Water Levels of the Cham plain and Hudson 

 Valleys. New York State Museum, Bulletin No. 84; Albany, July, 1905.] 



Pleistocene Geology of Mooers Quadrangle. [New York State Museum, 



Bulletin No. 83; Albany, June, 1905.] 



-Wright, C. W. The Porcupine Placer District, Alaska. [U. S. Geological 

 Survey, Bulletin No. 236, 1904.] 



-Wright, Fred Eugene. The Determination of the Optical Character of 

 Birefracting Minerals. [Extract from American Journal of Science, Vol. 

 XX, pp. 285-96; October, 1905.] 



