XV 
United States Geological Survey. Monographs. Vol. xliv., 
Pseudoceratites of the Cretaceous, by Alpheus Hyatt. Yol. 
xlv., The Vermilion Iron-bearing District of Minnesota, with 
an Atlas, by J. Morgan Clements. Washington, 1903. 
Geological Survey. Monographs xlii. and xliii. Professional 
Papers 1 to 8. 
Geological Survey. Bulletins, Nos. 191, 195 — 207. 
Geological Survey. Bulletins, 1903. 
No. 20P. Tho Geology of Ascutuez Mountain, Vermont. 
No. 210. Tho Correlation of Geological Faunas. 
No. 211. Stratigraphy and Palieontology of tho Upper Carboniferous 
of tho Kansas Section. 
No. 212. Oil-Fields of the Texas- Louisiana Gulf Coastal Plain. 
No. 213. Contributions to Economic Geology, 1902. 
No. 214. Geographic Tablos and Formulas. 
No. 215. Catalogue and Index of Publications of United States 
Geological Survey, 1902 — 1903. 
No. 21 (i. Results of the Primary Triangulation and Primary Traverse, 
Fiscal year 1902 — 3. 
No. 217. Notes on Geology of South-western Idaho and South-oastcrn 
Oregon. 
Geological Survey. Mineral Resources of the United 
States, by David T. Day. Washington, 1902. 
Geological Survey, Water Supply and Irrigation Papers. 
No. 65 — 79. Washington, 1902 — 03. 
Youkshike Naturalists’ Union, Transactions of the. Part 28, Tho 
Fungus-Flora of Yorkshire, by G. Massee, F.L.S., F.R.M.S., 
and C. Crossland, F.L.S. ; and Part 29, 1902. 
Zoological Society of London, Transactions of the. Yols. xiii., xiv., 
xv., xvi. 4to. From Mr. J. H. Gurney, F.Z.S. 
Zoologist, The. A Monthly Journal of Natural History, April, 1 903 
— April 1904. From Mr. G. F. Buxton, F.Z.S. 
Zootiiamnium geniculatum, a New Infusorian, by William Ayrton. 
Reprinted from Journal Quekett Microscopical Club, April, 1903, 
with Plate. From the Author. 
