38 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 162. 
241 Dumble(E. Tv). Some Texas oil horizons. 
Texas Acad. Sci., Trans., vol. ii, pp. 87-92, 1897. 
Describes occurrence in Carboniferous and Cretaceous strata. 
242 Dunn (Russell L.). The country of tbe Klondike [Alaska]. 
Mg. and Sci. Press, vol. lxxvii, pp. 400, 425-426 and 449, 1898. 
Describes tbe glacial features of the region and the occurrence of the 
gold-bearing rocks and placers. 
E. 
243 Eakle (Arthur S.). Erionite, a new zeolite. 
Am. Jour. Sci., 4th sef., vol. vi, pp. 66-68; Review, Am. Geol., vol. 
xxii, p. 378 (ip.), 1898. 
Describes the occurrence and chemical character of the material found 
in a rhyolite tuff from Oregon. 
244 — — A biotite-tinguaite dike from Manchester by the Sea, Essex 
County, Massachusetts. 
Am. Jour. Sci., 4th ser., vol. vi, pp. 489-492, 1898. 
Describes the occurrence of the dike and the microscopic and chemi- 
cal characters of the dike rocks. 
245 Earle (Charles). Relationship of the Chriacida? to the primates. 
Am. Nat., vol. xxxii, pp. 261-262, 1898. 
246 Eastman (C. R.). Dentition of Devonian Ptyctodontidae. 
Am. Nat., vol. xxxii, pp. 473-488, 545-560, 50 figs., 1898. 
Describes material from the State quarry beds of Iowa and discusses 
the relations of the Devonian fish fauna of Milwaukee, Wisconsin. 
247 Some new points in Dinichthyid osteology. 
Am. Nat., vol. xxxii, pp. 747-768, 6 figs., 1898. 
248 On the occurrence of fossil fishes in the Devonian of Iowa. 
Iowa Geol. Surv., vol. vii, pp. 108-116, pi. iv, fig. 10, 1897; Eeview by 
C. R. Keyes, Am. Geol., vol. xxii, pp. 237-238, 1898. 
Discusses the differences in the Devonian and Carboniferous fish 
faunas. 
249 Eaton (G. F.). The prehistoric fauna of Block Island, as indi- 
cated by its ancient shell heaps. 
Am. Jour. Sci., 4th ser., vol. vi, pp. 137-159, 1898. 
Describes the general geologic and geographic features of the island 
and the occurrence and distribution of the shell heaps. Gives lists of 
the species found in them. 
250 Elftman (A. H.). The geology of the Keweenawan area in north- 
eastern Minnesota. 
Am. Geol., vol. xxi, pp. 90-109, with map, 175-188, vol. xxii, pp. 131-149, 
pi. vii, 1898. 
Describes the glacial geology of the region and gives a historical 
review and description of the stratigraphy of the Keweenawan series 
and an account of the gabbro group. 
