—Insecta by Alpheus Hyatt and J. M. Arms.—Am. Jour. Sci., March, 1891.
—New Types of Carboniferous Cockroaches from the Carboniferous Deposits of the United States; (2) New Carboniferous Myriapoda from Ill.; (3) Illustrations of the Carboniferous Arachnida of N. A., of the orders Anthracomarti and Pedipalpi; (4) The Insects of the Triassic Beds at Fairplay, Col., Samuel H. Scudder. 2 pp.—Am. Jour. Sci., Jan., 1891.
—Some Abnormal and Pathologic Forms of Fresh Water Shells from the Vicinity of Albany, N. Y. 2 pp., 2 pl.—36th Rep. N. Y. State Mus. of Nat. Hist.
—The Development of a Paleozoic Poriferous Coral. Symmetrical Cell Development in the Favositidæ. 12 pp., 7 pl.—Trans. Conn. Acad. Sci., Vol. 8, 1891.
—On Leptænisca, a New Genus of Brachiopod from the L. Helderberg Group. N. A. Species of Strophalosia. 8 pp., 1 pl.—Am. Jour. Sci., Sept., 1890.
—Ceratiocaridæ from the Chemung and Waverly Groups at Warren, Penn. 22 pp., 2 pl.—Rep. of Prop., PPP, 2d Geol. Surv. Penn., 1884.
—A Spiral Bivalve from the Waverly Group of Penn. 4 pp., 1 pl.—39th An. Rep. N. Y. State Mus., 1886.
—On the Lingual Dentition and Systematic Position of Pyrgula. 8 pp., 1 pl. Jour. N. Y. Mic. Soc., Jan., 1890.
—On the Occurrence of U. Silurian Strata near Penobscot Bay, Maine. 6 pp., Ill.—Am. Jour. Sci., May, 1892.
—Koninckina and Related Genera. 9 pp., 1 pl.—Am. Jour. Sci., Sept., 1890.