MONOGRAPHS. 
Department of the Interior Monographs of the United States 
Geological Survey Volume XLI [-XLV] [Seal of the Department] 
Washington Government Printing Office 1902 [-1903] 
4°. 5 vols. Bound in dark -maroon cloth. 
XLI. Glacial formations and drainage features of the Erie and Ohio basins, by 
Frank Leverett. 1902. 802 pp., 26 pis. Price, $1.75. 
XLII. Carboniferous ammonoids of America, by J. P. Smith. 1903. 211 pp., 
29 pis. Price, 85 cents. 
XLII I. The Mesabi iron-bearing district of Minnesota, by C. K. Leith. 1903. 
316 pp., 33 pis. Price, $1.50. 
XLIV. Pseudoceratites of the Cretaceous, by Alpheus Hyatt, edited by T. W. 
Stanton. 1903. 351 pp., 47 pis. Price, $1. 
XLV. The Vermilion iron-bearing district of Minnesota, with atlas, by J. M. 
Clements. 1903. 463 pp., 13 pis. Price, — . 
11 
