U.S.P.R.R. Exp. & Surveys. 35th parallel. Geology plate II. Figs. 1,2, terebratula millipunctata.--figs. 3,4,5, t. Subtilata.--figs. 6,8, spirifer lineatus.--figs. 9,12,13, sp. Cameratus. Figs. 10,11, s. Kentuckensis.--figs. 16,17, productus semireticulat