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58 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [bull. 271 
G-reger (D. K.)— Continued. 
2. On the genus Rhynchopora, King, with notice of a new species. 
Am. Geol., vol. 33, pp. 297-301, 12 figs., 1904. 
Gregory (H. E.). 
1. Notes on the wells, springs, and general water resources of Con- 
necticut. 
U. S. Geol. Surv., Water-Supply and Irrig. Paper no. 102, pp. 127-168, 
Gregory (W. M.). 
1. The alabaster area [Michigan]. 
Mich. Geol. Surv., vol. 9, pt. 2, pp. 60-77, 1904. 
Describes the glacial geology, the physiographic features, and the Paleozoi 
geological formations exposed in this area. 
Griffith (William). 
1. A Missouri coal hold. 
Eng. & Mg. Jour., vol. 77, pp. 564-565, 5 figs., 1904. 
Describes the occurrence and character of coal in Morgan County, Missouri. 
Grimsley (G. P.). 
1. Gypsum deposits in Michigan. 
U. S. Geol. Surv., Bull. no. 223, pp. 45-47, 1904. 
Describes occurrence, character, economic development, and geologic relatio 
of the gypsum deposits. 
2. Gypsum deposits in Kansas. 
U. S. Geol. Surv., Bull. no. 223, pp. 53-59, 1 pi., 3 figs., 1904. 
Describes character, occurrence, economic development, and geologic relation 
of the gypsum deposits in Kansas. 
3. A theory of origin for the Michigan gypsum deposits. 
Am. Geol., vol. 34, pp. 378-387, 1904. 
Describes the general geology of lower Michigan and the geological history of 
the Michigan basin, and discusses tho conditions under which the gypsum 
deposits of this area were produced. 
4. The gypsum of Michigan and the plaster industry. 
Mich. Geol. Surv., vol. 9, pt. 2, 246 pp., 29 pis., 49 figs., 1904. 
( iives an account of the occurrence and utilization of gypsum deposits in other Hi 
countries and states, describes the geology and topography of the Michigan 
series gypsum, and the mining of the gypsum deposits and manufacture into 
plaster, and discusses the origin of gypsum and its various uses. 
Gulick (Addison). 
1. The fossil land shells of Bermuda. 
Phila. Acad. Nat, Sci., Proc, vol. 56, pp. 406-421, 1 pi. and 3 figs, (maps) , 1904. 
Describes the occurrence and gives systematic descriptions of fossil land shells 
of Bermuda. 
Gulliver (F. P.). 
1. Nantucket shorelines. I. 
Abstract: Geol. Soc. Am., Bull., vol. 14, pp. 555-556, 1904. 
Outlines a proposed investigation to determine changes in shore lines. 
2. Nantucket shorelines. II. 
Geol. Soc. Am., Bull., vol. 15, pp. 507-522, 4 pis., 4 figs., L904. 
Describes recent changes in the shore lines of Nantucket Island. 
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