108 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [bull.'. 
Sheridan (Jo E.). 
1. Annual report of the mine inspector for the Territory of N( 
Mexico. 
U. S. Mine Inspector for the Territory of N. Mex., Ann. Rept. to the Sec 
tary of the Interior for the year ended June 30, 1904. Washington, 19 
79 pp. 
Includes a description of the New Mexico coal fields, showing the occurren \\ 
character, geologic relations, etc., of the coal seams. 
Shimek (B.). 
1. Fresh -water shells in the loess. 
Abstract: Geol. Soc. Am., Bull., vol. 15, p. 576, 1904; Science, new ser., vl 
19, p. 533, 1904; Sci. Am. Suppl., vol. 57, p. 23447, 1904. 
2. Helicina occulta Say. 
Davenport Acad. Sci., Proc, vol. 9, pp. 173-180, 1904. 
Discusses the geographical and geological distribution of this mollusc, whi 
occurs in a fossil state in the loess. 
3. Papers on the loess. 
Iowa State Univ., Lab. Nat. Hist., Bull., vol. 5, pp. 298-381, 1904. 
Includes the live following papers. 
4. The loess of Natchez, Miss. 
Iowa State Univ., Lab. Nat. Hist,, Bull., vol. 5, pp. 299-326, 7 pis., 1904. 
This paper appeared in the American Geologist, vol. 30, 1902. See no. 961 
U. S. Geol. Surv., Bull. no. 221, 1903. 
5. The loess and the Lansing man. 
Iowa State Univ., Lab. Xat. Hist., Bull., vol. 5, pp. 327-346, 1904. 
This paper appeared in the American Geologist, vol. 32, 190.'!. See no. Y. 
of U. S. Geol. Surv., Bull. no. 240, 1904. 
6. The Lansing deposit not loess. 
Iowa State Univ., Lab. Nat. Hist., Bull., vol. 5, pp. 346-352, 3 pis., 1904. 
Discusses the characters which distinguish loess deposits, and their bear: 1 
upon the kind and ageof the deposits containing the Lansing human remai fl 
7. Loess and the Iowan drift. 
Iowa State Univ., Lab. Nat. Hist,, Bull., vol. 5, pp. 352-3(58, 2 pis., 1904. 
Discusses the position of loess deposits with reference to drift deposits, and 1 1 
bearing of these facts upon the question of the formation of the loess, a | 
points out the stratigraphic position of various loess deposits. 
8. Evidences (?) of water-deposition of loess. 
Iowa State Univ., Lab. Nat. Hist., Bull., vol. 5, pp. 369-381, 2 pis., 1904. 
Discusses the evidences advanced for the theory of the deposition of loess 
water action. 
Simmons (Jesse). 
1. Tungsten ores in the Black Hills. 
Mg. Rep., vol. 50, pp. 217-218, 1904. 
Describes the occurrence and character of tungsten ores and discusses th 
origin. 
