. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. VIl/c I. PleuTotomaria thalia. See Cyclonema thalia. Pleurotomaria trilineata. Hall. Trans. Alb. Inst. Vol. 4, .^g^l856, Whitfield, Bull. 3, Am. Mus. Nat. Hist. N. Y. 1882, pi. 9 fig. 20, enlarged three times^ type specimen. Somewhat resembles Cyclonema {Pleurotomaria) leavenworth- ana^ but cannot be mistaken for it except in casts; distinguished by the revolving r/. SiC^ grooves on lower part of shell. Spergen Hill, etc., Ind. Subcarhoniferous.—XL Pleurotoma
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. VIl/c I. PleuTotomaria thalia. See Cyclonema thalia. Pleurotomaria trilineata. Hall. Trans. Alb. Inst. Vol. 4, .^g^l856, Whitfield, Bull. 3, Am. Mus. Nat. Hist. N. Y. 1882, pi. 9 fig. 20, enlarged three times^ type specimen. Somewhat resembles Cyclonema {Pleurotomaria) leavenworth- ana^ but cannot be mistaken for it except in casts; distinguished by the revolving r/. SiC^ grooves on lower part of shell. Spergen Hill, etc., Ind. Subcarhoniferous.—XL Pleurotomaria trilix, Hall. 15th Annual Report of N. •^. Y. 1862, p. 45, pi. 5, fig. 1 ; a distinct keel on the last whorl just below the sutuie; periphery has three keels inclosing two depressed bands on which the concentric striae are abruptly bent backwards from the aperture. Imperfect specimens, but species readily distinguished. Seneca lake Hamilton shales. In Penn- sylvania, Perry Co., Olaypole's Coll. Spec. 5-12, from Barnett's mill, outcrop of Hamilton upper shale; Spec. 74 C-12 (two), from the same outcrop along Soap Hill between N. Bloomfield and Newport; and Spec. 99-12, from Drumgold's tanner}^ on Sherman creek.— VIIIc. Pleurotomaria {Scalites?) tropidophora, Meek. Amer. 1116-. 6^ ^. .. ^^"^- ^- ^^^ ^' t^^ ^^^^' ^' 1872, Cincinnati group. Pal. Ohio, Vol. 1, 1873, page 154, plate 13, figs. 6 a^ J, c^ enlarged two diameters, A shell having s^me of the characters of both Pleurotomaria and of Scalites, It has no trace of the revolv- ing band, but its growth lines have the strong oblique back- ward curve of Scalites, etc. Diff'ers from P. selecta of Bil- lings. Hiidson river strata at Cincinnati.—III h. Pleurotomaria tumida. See Platystoma tumidum. XIIP Pleurotomaria turbinella, reported by I. C. White from the Ferriferous limestone {Allegheny coal series) at the quar- ries, south bank of Ohio river, below Eaccoon, Beaver Co., Pa. (K, 346; Q, 62); also Lawrence Co. (Q
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