MARYLAND GEOLOGICAL SURVEY 325

WILLIAMS, GEORGE H. Sixth Annual Excursion of the Geological
Department, May 29, June 5, 1893.

Johns Hopkins Univ. Cir. No. 109, vol. xiii, 1894, p. 26.

Itinerary and description of localities in the Blue Ridge, near Hancock, and at Har-
per's Ferry.

———— The Distribution of Ancient Volcanic Rocks along the
Eastern Border of North America.

Jour. Geol., vol. ii, 1S94, pp. 1-31.

Distribution in Pennsylvania, Maryland and Virginia, pp. 25, 26, 27. Accompanied
by map showing known and probable occurrence of ancient volcanic rocks in eastern
North America.

1895.

ANON. [Vertebrate fauna of the Potomac formation in Maryland.]

Science, n. s. vol. i, 1895, p. 362.

Mention of four species of Dinosaurs collected by Arthur Bibbins.

BIBBINS, A. Notes on the Paleontology of the Potomac Formation.

Johns Hopkins Univ. Cir. No. 121, vol. xv, 1S95, p. 17.

An account of recent contributions to the fauna and flora of the Potomac Formation.

BIRKINBINE, JOHN. Production of Iron Ores in Various Parts of
the World.

16th Ann. Rept, U. S. Geol. Survey, 1894-95, part iii, Washington, 1S95.
Page 201, Maryland Iron Ores.

CLARE, WM. B. Description of the Geological Excursions made
during the spring of 1895.

Johns Hopkins Univ. Cir. No. 121, vol. xv, 1895, p. 1.
Summary statement concerning local geology.

———— Contributions to the Eocene Fauna of the Middle Atlantic
Slope.

Johns Hopkins Univ. Cir. No. 121, vol. xv, 1895, pp. 2-5.

Gives the paleontological criteria for correlation, and appends a long list of Eocene
forms, including many new forms which are described and figured more fully in Bull.
U. S. Geol. Surv. No. 141, 1896.

———— Cretaceous Deposits of the Northern Half of the Atlantic
Coastal Plain.

Bull. Geol. Soc. Amer., vol. vi, 1S95, pp. 479-482,

A discussion of the classification and description of the formations of the Cretaceous
of New Jersey, Delaware and Maryland.

DANA, J. D. Manual of Geology. 4th edit. 8vo. New York,
Blakeman, Taylor & Co., 1895.

Maryland, PP. 740, 742, S16, 823. See also earlier editions.