70 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [bull. 271. 
Jennings (E. P.). 
1. The copper deposits of the Kaibab Plateau, Arizona. 
Am. Inst. Mg. Engrs., Trans., vol. 34, pp. 839-841, 1904. 
See no. 639 of the Bibliography for 1903, U. S. Geol. Surv., Bull. no. 240. 
2. Origin of the magnetic iron ores of Iron County, Utah. 
Am. Inst. Mg. Engrs., Trans. (Atlantic City meeting, February, 1904), 5 pp., 
1904 [advance separate]. \ 
Describes the occurrence and character of the magnetic iron ore deposits and 
discusses their origin. 
Jennison (W. F.). 
1. Notes on the history of manganese mining- in part of Nova Scotia j 
and on some of the geological conditions of the manganese belt j 
running through Hants County. 
Nova Scotia Mg. Soc, Jour., vol. 8, pp. 106-109, 1904. 
Discusses the occurrence and geologic relations of the manganese ore deposits. 
Johnson (Charles W.). 
1. Description of two new Tertiary fossils. 
Nautilus, vol. 17, pp. 143-144, 2 tigs., 1904. 
Johnson (C. W.) and G-rabau (A. \V.). 
1. A new species of Clavilithes from the Eocene of Texas. 
Phila. Acad. Nat. Sci., Proc, vol. 53, pp. 602-603, 2 figs., 1902. 
Johnson (L. C.) and Eckel (E. C). 
1. Notes on wells, springs, and general water resources of Mississippi! 
U. S. Geol. Surv., Water-Supply and Irrigation Paper no. 102, pp. 332-357, 1904 
Johnson (Willard D.). 
1. The profile of maturity in Alpine glacial erosion. 
Jour. Geol., vol. 12, pp. 569-578, 1904. 
Discusses physiographic characteristics due to glacial erosion of the Sierr; 
Nevada Mountains, and the agencies by which they were produced. 
Joly (Henri). 
1. Notice sur le Dr. Professor Charles Othoniel Marsh (29 octobrc 
1831-18 mars 1899). 
Angers, Bull, de la Soc. d'Etud. Sci., new ser., vol. 30, pp. 114-117, 1901. 
Jones (Fayette Alexander). 
1. New Mexico mines and minerals. World's Fair edition, 1904. 
Santa Fe, N. M., The New Mexican Printing Company, 1904. 349 pp., 50 figs 
Includes a brief account of the general geology, and observations on the occur 
rence, geologic relations, and character of various ore deposits, mining an< 
production of metals, etc. Gives a list of minerals occurring in New Mexico 
Jones (T. Rupert). 
1. Note on a Paleozoic Cypridina from Canada. 
Geol. Mag., dec. 5, vol. 1, pp. 438-439, 1 fig., 1904. 
Describes a new species under the name Cypridina antiqua. 
