1. Catalogue of the tertiary testacea of the United States Author(s): Lea, Henry Charles, 1825-1909 Publication: Philadelphia : Merrihew & Thompson, 1848 Subject(s): Mollusca
2. Observations on a portion of the Atlantic tertiary region: with a description of new species of organic remains Author(s): Conrad, T. A. (Timothy Abbott), 1803-1877, author Publication: [Washington, D.C.] : [National Institution], [1842] Subject(s): MolluscaAnimal ShellsFossilsMid-Atlantic RegionSoutheastern United States