weeks.] PALEONTOLOGY, PETROLOGY, AMD MINERALOGY, 1895. 41 
177 G-ratacap (L. P.)- The possible revival of Virginia City, Nevada. 
Sci. Am. Suppl., vol. xl, pp. 16329-16330. 
Describes tlie occurrence of the ore bodies in this region. 
178 Griswold (Leon S.). The origin of the Arkansas novaculites. 
Boston Soc. Nat. Hist., Proc, vol. xxvi, pp. 414-421. 
Describes the held relations of the Arkansas novaculites and discusses 
their origin, with special reference to a paper by F. Rutley on the same 
subject. 
179 Origin of the Lower Mississippi. 
Boston Soc. Nat. Hist., Proc, vol., xxvi, pp. 474-479, with map. 
Compares the Cretaceous peneplain of Arkansas with that of the 
Appalachian region and describes the development of the former. 
180 Gulliver (F. P.), Gilbert (G. K.) and. Tepee buttes. 
Geol. Soc. Am., Bull., vol. vi, pp. 333-342, pi. 17. 
See Gilbert (G. K.) and Gulliver (F. P.), No. 164. 
181 Gurley (W.F.E.), Miller (S. A.) and. New and interesting species 
of Paleozoic fossils. 
111. State Mns. Nat. Hist., Bull. No. 7, pp. 89, pis. i-v. 
See Miller (S. A.) and Gurley (W. F. E.), No. 346. 
H. 
182 Hall (0. W.). Mineral alterations in the granitic rocks of the 
Northwestern States. 
Abstract: Am. Assoc. Adv. Sci., Proc., vol. xliii, p. 236 (4 p.). 
Discusses the alterations of granites in Minnesota and Wisconsin. 
183 and Sardeson (F. W.). The Magnesian series of the North- 
western States. 
Geol. Soc. Am., Bull., vol. vi, pp. 167-198, pi. 2. 
Discusses the lithologic and paleontologic characteristics of the series. 
Describes the local features of the St. Lawrence dolomites and shales, 
Jordan sandstone, Oneota dolomite, New Richmond sandstone, and the 
Shakopee dolomite. Discusses the lithology and genesis of the sand- 
stones, shales, and dolomites. Includes a geologic map of portions of 
Minnesota, Iowa, Wisconsin, and Illinois. 
184 Halse (Edward). The silver district of Tehuilotepec, State of 
Guerrero, Mexico. 
Eng. and Mg. Jour., vol. lx, pp. 197-199. 
Describes the occurrence of silver ores in this region and the character 
of the mining and ore reduction processes. 
185 Harris (Gilbert D.). New and otherwise interesting Tertiary Mol- 
lusca from Texas. 
Phila. Acad. Nat. Sci., Proc. 1895, pp. 45-88, pis. 1-9. 
Describes many new species from the Tertiary rocks of Texas. 
18G Harris (Hunter L.). History of the Atlantic shore line. 
Elisha Mitchell Sci. Soc, Jour. 1891, part ii, pp. 33-50. 
Discusses the evidences of the changes that have affected the Atlantic 
shore line of the United States during geologic times. 
