32 BIBLIOGRAPHY AND INDEX OP N. A. GEOLOGY, [bull. 146. 
98 Cragin (F. W.). The Mentor beds : A central Kansas terrane of the 
Comanche series. 
Am. Geol., vol. xvi, pp. 162-165. 
Describes the lithologic character of these beds in Saline County, 
Kans., and gives a list of the fossils collected. 
09 A study of the Belvidere beds [Kansas]. 
Am. Geol., vol. xvi, pp. 357-385. 
Discusses the use of the term Belvidere. Describes the lithologic aud 
faunal characters of the different subdivisions of the Belvidere beds and 
reviews the classiiication of the Comanche terranes. 
100 Crosby (William O.). Geology of the Boston Basin. Part II. 
Hingham [Mass.]. 
Bost. Soc. Nat. Hist., Occasional papers IV, vol. i, part ii, 1894, pp. 179- 
288, pis. vii-ix. 
Describes the topography, character, and distribution of the granite 
and sedimentary rocks. Gives a detailed account of the geology of 
Hingham and discusses the geologic age of the formations. Describes 
the glacial geology. The paper contains three colored geologic maps. 
101 A classification of economical geological deposits. 
Eng. and Mg. Jonr., vol. lix, pp. 28-29. 
Reviews criticisms of R. W. Ra3 7 mond on a former paper on the same 
subject. 
102 Cross (Whitman). Geology and mining industries of the Cripple 
Creek district, Colorado. Part I. General geology of the 
Cripple Creek district, Colorado. 
U. S. Geol. Surv., 16th Ann. Rept., part ii, pp. 13-109, pis. i-ii, fig. 1. 
Chapter I (introduction) describes the geographic position and geo- 
logic character of the district, and its recent physiographic changes. 
Chapter II. — Rock formations. Describes the petrographic characters 
of granite, schist, diabase, phonolite, nepheline-syenite, augite-syenite- 
porphyry, andesite, tuff, breccia, rhyolite, and the High Park lake beds. 
Chapter III. — The Cripple Creek volcano. Describes the constitution 
and distribution of the fragmeutal materials and the character of the 
volcanic phenomena. 
Chapters IV and Y. — Comprise a description of the distribution of the 
volcanic rocks in the central area and its outlying districts. 
103 Culver (G. E.). Some New Jersey eskers. 
Wis. Acad. Sci., Arts and Letters, Trans., vol. x, pp. 19-23. 
Describes the occurrence of eskers at Ramapo, in northeastern New 
Jersey. 
104 The erosive action of ice. 
Wis. Acad. Sci., Arts and Letters, Trans., vol. x, pp. 339-366. 
Quotes the opinions of a large number of writers on glacial erosion, 
citing the publications, and giving the author's conclusions. 
105 Cummins (W. F.). A question of priority. 
Am. Geol., vol. xv, pp. 395-396 (correspondence). 
Discusses the question of priority in the use of the term "Goodnight" 
to distinguish certain beds between the Loup Fork and Blauco, in 
Texas, and the term "Palo Duro," employed by W. 13. Scott and in 
Dana's Manual of Geology. 
