March 28th; Descriptions of New Species of Fishes Collected in Texas, New Mexico and Sonora, by Mr. John H. Clark, on the U. S. and Mexican Boundary Survey, and in Texas by Capt. Stewart Van Vliet, U. S. A; Rectification of the Generic Names of Tertiary Fossil Shells; Notes on Shells, with Descriptions of Three Recent and One Fossil Species; Note on the Genus Amblychila, Say

F. S. Baird, Charles Girard, T. A. Conrad and John L. Le Conte

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