198 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
White, David — Continued. 
2542. Geological position of the principal insect-bearing localities of the 
American Paleozoic— U. S. Nat. Mils., Proc, vol. 29, pp. 664-668, 15)06. 
2543. Report on fossil plants [from the Cape Lisburne region, Alaska]. — 
U. S. Geol. Survey, Bull. no. 27S, p. 22, 1 pi., 1906. 
Gives a list of the plants identified and considers them to indicate a lower Mississip- 
pian age. 
2544. A remarkable fossil tree trunk from the middle Devon ic of New 
York.— New York State Mus., Bull. 107, pp. 327-360, 11 pis., 1907. 
2545. Report on the field work in the coal districts of the State. — Illinois 
State Geol. Survey, Bull. no. 4, pp. 201-203, 1907. 
Gives notes upon the stratigraphy of the coal measures of Illinois, based upon the 
study of fossil plants. 
2546. Report on fossil plants from the coal measures of Arkansas. — U. S. 
Geol. Survey, Bull. no. 326, pp. 24-31, 1907. 
Gives lists of plants identified from various localities. 
2547. A composite Lycopod type from the Devonian. — Abstract : Science, new 
ser., vol. 25, p. 269, February 15, 1907. 
2548. Some problems concerning the formation of coal. — Abstract: Science. 
new ser., vol. 25, pp. 965-966, June 21, 1907. 
White, David, and Ashley, George H. 
2549. Correlation of coals. — IT. S. Geol. Survey, Prof. Paper no. 49, pp. 200- 
212, 1906. 
Discusses the correlation of coal seams in the Appalachian region with special refer- 
ence to the Cumberland Gap coal field of eastern Kentucky. 
White, I. C. 
2550. Introduction [to the Report on the geology of the Pan Handle counties 
of West Virginia]. — West Virginia Geol. Survey, County Reports and Maps- 
Ohio, Brooke, and Hancock counties, pp. vii-xxi, 1 fig. [19071. 
Includes a discussion of the occurrence of certain coal beds. 
White, W. P. 
On wollastonite and pseudo-wollastonite, polymorphic forms of calcium meta- 
silicate. — See Allen and White, no. 27. 
Die Kalkkieselreihe der Minerale. — See Day and others, no. 690. 
Whiteaves, J. F. 
2551. [Report on] paleontology and zoology. — Canada, Geol. Survey, Summ. 
Rept. for 1905, pp. 131-134, 1906. 
Gives a short account of the work done in paleontology and zoology during the year 
by the Geological Survey of Canada. 
2552. [Report on] paleontology and zoology. — Canada, Geol. Survey. Summ. 
Rept. for 1906, pp. 170-174, 1906. 
Gives an outline of the work of the year in this section o/ the Geological Survey of 
Canada. 
2553. The fossils of the Silurian (Upper Silurian) rocks of Keewatin, Mani- 
toba, the northeastern shore of Lake Winnipegosis, and the lower Saskatchewan 
River. — Canada Geol. Survey, Paleozoic Fossils, vol. 3, pt. 4, pp. 243-298, 14 pis., 
1906. 
Gives critical notes upon the fossils from these places and systematic descriptions of 
some of them. 
2554. The Canadian species of Plcctoccras and Barrandroccras. — Canada, 
Geol. Survey, Paleozoic Fossils, vol. 3, pt. 4, pp. 299-312, 6 pis., 1906. 
