weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1895. 33 
106 Cushing (Henry P.). Faults of Chazy Township, Clinton County, 
New York. 
Geol. Soc. Am., Bull., vol. vi, pp. 285-296, pi. 12. 
Describes the general features of the district and of the Cambrian 
and Silurian formations. Describes the three classes of faults, and 
discusses the cause of the nonappearance of the Calciferous at Chazy 
village. The paper is accompanied by a geologic map of Chazy Township. 
D. 
107 Dall (William H.). Monograph of the genus Gnathodon Gray 
(Rangia Desmoulins). 
U. S. Nat. Mus., Proc, vol. xvii, pp. 89-106, pi. vii. 
Describes the characters and distribution of the genus Gnathodon, 
and also the characters of a number of living and fossil species. 
108 Note on the Atlantic Miocene. 
Abstract : Am. Assoc. Adv. Sci., Proc, vol. xliii, pp. 224-225 (£ p.). 
109 Darton (Nelson Horatio). Artesian well prospects in eastern Vir- 
ginia, Maryland, and Delaware. 
Am. Inst. Mg. Engrs., Trans., vol. xxiv, pp. 372-397, pis. i-ii. 
Presents a map showing the distribution of artesian wells, and also 
four cross sections of the region. Describes the character and distribu- 
tion of the Pleistocene, Tertiary, and Cretaceous strata, and discusses 
the conditions affecting subterranean waters. Gives the records of 
many well borings in the region. 
110 and Kemp (J. F.). A newly discovered dike at Dewitt, 
near Syracuse, New York. Geological notes by N. H. Dar- 
ton. Petrographic description by J. F. Kemp. 
Am. Jour. Sci., 3d ser., vol. xlix, pp. 456-462. 
Abstract : Gcol. Soc. Am., Bull., vol. vi, pp. 477-478. 
Describes the occurrence of the dike in the Salina formation. Eefers 
to the previous descriptions of this dike rock and describes its petro- 
graphic characters. Presents a table showing its chemical analysis, and 
of serpentine from Syracuse and mica-peridotite from Kentucky. Gives 
the records of various wells, showing the thickness of sedimentary strata 
through which the dike must have penetrated. 
111 Davis (Floyd). The coal supplies of Polk County, Iowa. 
Eng. and Mg. Jour., vol. lix, pp. 149-150. « 
Describes the character and distribution of coal beds in this county. 
11-5 Davis (William Morris). The ancient outlet of Lake Michigan. 
Pop. Sci. Monthly, vol. xlvi, pp. 217-229. 
Reviews previous descriptions of the glacial history of the Great 
Lakes region and describes the glacial phenomena of the country adja- 
cent to Lake Michigan in Illinois. 
113 Dawson (George M.). Inter-Glacial climatic conditions. 
Am. Geol., vol. xvi, pp. 65-66. 
Discusses the evidence of the plant remains found at Toronto, Out., in 
its bearing on the question of inter-Glacial climatic conditions. 
Bull. 146 3 
