weeks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1894. 95 
5S0 Upham (Warren). Quaternary time divisible iuto three periods — 
the Lafayette, Glacial, and Eecent. 
Am. Nat., vol. xxviii, pp. 979-988. 
Abstract : Am. Geol., vol. xiv, p. 203 (| p. ). 
Reviews the previous opinions on the duration of the geologic sub- 
divisions mentioned and discusses the classification proposed. 
581 Preliminary report of field work during 1803 in northeastern 
Minnesota, chiefly relating to the glacial drift. 
Minn. Geol. and Nat. Hist. Surv., 22d Ann. Rept. r pp. 18-66. 
Describes the topography and the Archean outcrops of the region. 
Discusses the evidences of Cretaceous beds underlying the drift, and 
describes the glacial deposits. 
582 The origin of drumlins. 
Bost. Soc. Nat. Hist., Proc, vol. xxvi, pp. 2-17. 
Abstract: Am. Nat., vol. xxviii, p. 596 (i p.). 
Describes the various forms of drumlins and their areal distribution 
and reviews the previous theories as to their origin. Considers them 
accumulations from englacial drift. Compares them with moraines, 
kames, and eskers. 
583 Deflected glacial striae in Somerville [Mass.]. 
Bost. Soc. Nat. Hist., Proc. vol. xxvi, pp. 33-42. 
Describes the occurrence of glacial strhe and gives their observed 
courses at different points in the vicinity of Somerville, Mass. 
584 The fishing banks between Cape Cod and Newfoundland. 
Bost. Soc. Nat. Hist., Proc, vol. xxvi, pp. 42-48; Am. Jour. Sci., 3d 
ser., vol. xlvii, pp. 123-129. 
Abstract : Am. Geol., vol. xii, pp. 190-191 (i p. ). 
Describes the fishing banks of this region and discusses the evidences 
of a long-continued uplift at the close of the Tertiary period. 
585 [Extra-morainic drift of the Delaware Valley.] 
Geol. Soc. Am., Bull., vol. v, pp. 16-17 (V p.). 
In discussion of papers by A. A. Wright and E. H. Williams, jr., on 
the glaciated regions of New Jersey and Pennsylvania. 
580 [Terrestrial submergence southeast of the American Continent.) 
Geol. Soc. Am., Bull., vol. v, p. 22 (l p.). 
In discussion of paper by J. W. Spencer on the same subject. 
587 Evidences of the derivation of the kames, eskers, and moraines 
of the North American ice sheet, chiefly from its englacial 
drift. 
Geol. Soc. Am., Bull., vol. v, pp. 71-86. 
Abstract : Am. Geol., vol. xii, p. 169 (f p. ). 
Describes glacial phenomena of Long Island, near Rochester, and in 
portions of North Dakota and Manitoba, which are considered typical 
examples of the transportation and deposition of the materials of karaes, 
eskers, and moraines. 
