The fauna of the lower cambrian olenellus zone. By C. D. Wolcott.
—— Eleventh annual report of the U.S. geological survey to the Secretary of the Interior, 1889-'90. By J. W. Powell, director. Part II, Irrigation. Washington, 1891. xiv, 1-395pp., 30 pls.1.00
—— Monographs, vol. xvi. Washington, 1889. 4o. 340pp., 53 pls.1.00
CONTENTS.
The paleozoic fishes of North America. By J. S. Newbury.
—— Bulletin no. 71. Washington, 1891. 744pp. .50
CONTENTS.
Index to the known fossil insects of the world, including myriapods and arachnids, by Samuel Hubbard Scudder.
—— Same. No. 72. Washington, 1891. 229pp..20
CONTENTS.