. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. 375 Macrodon hamiltoniae, Hall. 1870, Prelim. Notice Lam. shells, Olaypole's list, Report F2, preface, p. xiv. Hamilton formation, See Oat. 00, p. 231, specimen 5-62 (two) col- lected near Barrett's mill, N. W. of Bloomfield, Perry Oo., Pa. Multitudes of them occur in the Bedford shale of Ohio, which is higher in the series. Eeport I, p. 73.— VIII c. Macrodon hardingi, Dawson. Acadian Geology, 1868, p, XIII ^ \Q'> ^^ 302, fig. 102, «, medium sized
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. 375 Macrodon hamiltoniae, Hall. 1870, Prelim. Notice Lam. shells, Olaypole's list, Report F2, preface, p. xiv. Hamilton formation, See Oat. 00, p. 231, specimen 5-62 (two) col- lected near Barrett's mill, N. W. of Bloomfield, Perry Oo., Pa. Multitudes of them occur in the Bedford shale of Ohio, which is higher in the series. Eeport I, p. 73.— VIII c. Macrodon hardingi, Dawson. Acadian Geology, 1868, p, XIII ^ \Q'> ^^ 302, fig. 102, «, medium sized cast of the inner sur- face ; 5, outer surface ; (?, 3.:ivv -^^^^^^ >^ magniH^d sculpture; shell thick, usually represented by casts of interior, smooth, with deep scars; outer surface covered with regular squamous con- centric folds, fringed with delicate ray-lines; beautiful shell, abundant (especially in Windsor bed e); characteristic of up- per stages of Lower Cariomferous limestones. Allied to Byssoarca reticulata^ M'Coy, Irish coal measures; to Area m?Goyana^ and anatina^ De Kon. of Belgium; and to Bys8. tumida of the Permian. Largest specimens 1^ inch long.— XI? Macrodon obsoletus. Meek, Regent. Rt. Univer. Virginia, 1071; Geol. Ohio, Pal. Vol. 2, p. 334, pi. 19, fig. 9; recognized by Heilprin among the Mill Creek limestone carboniferous fossils in the museum of the Wyoming Hist. Soc, at Wilkes- barre, Geol. Pa. An. Rt. for 1885, page 456, fig. 19; 1000' above the Pottsville Conglomerate No. XII. In Beaver, Lawrence, Mercer and Butler Cos. it occurs in the Ferriferous lime- stone.^ not far above the Conglomerate. Q, 62; « MACRODON oB«>LET«.. q^, 47; Q3, 25; V, 147. In Fayette Co. it occurs in the Crinoidal limestone of the Barren Measures, L, 35- —XIII XIV. XV Note. For figure from Pal. Ohio, Vol. 2, p- 334, plate 19, fig. 19, ^ee Appendix, Macrodon? shubenacadiensis, Dawson. In Acadian ^3 Geology, 1868, p. 303, fig. 103, a cast of the shell; genus uncert
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