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424 Lindley & Hutton. Foss. Fl. Great Britain, vol. 1, 1831, p. 28, pl. vii, figs. 3, 4. D. White : Bull. Geol. Soc. Am., vol. 11, 1900, p. 169. [Pottsville group ; Kanawha formation.]

Lesquereux. Second Geol. Surv. Pa., Rept. of Progr., G7, Harrisburg, 1882 ([1883], p. 40. D. White: Bull. Geol. Soc. Am., vol. 6, 1895, p. 315; ibid., Bull. Geol. Soc. Am., vol. 11, 1900, pp. 161, 165. [Pottsville group; Kanawha formation.]

cf. Lesquereux. Second Geol. Surv. Pa., Rept. Progr. P (Coal Fl.), vol. 3, 1884, p. 785, pl. cvii, figs. 13, 14; pl. cviii, fig. 2. D. White: Bull. Geol. Soc. Am., vol. 11, 1900, p. 165. [Pottsville group ; Kanawha formation.]

Lesquereux. Boston Jour. Nat. Hist., vol. 6, 1854, p. 430. D. White : Bull. Geol. Soc. Am., vol. 11, 1900, p. 172. С [Allegheny formation.]

n. sp. D. White. Bull. Geol. Soc. Am., vol. 6, 1895, p. 315. [Pottsville group; Quinnimont and Sewell formations.]

Lesquereux. Second Geol. Surv. Pa., Rept. Progr. P, 1880, p. 457, pl. lxix, figs. 18-20. [Allegheny and Conemaugh formations ]

(Wood) Wood. Trans. Am. Phil. Soc. .Philadelphia, vol. 13, 1869, p. 342. D. White: Bull. Geol. Soc. Am., vol. 11, 1900, p. 171. [Alle gheny formation.] This species is in general characteristic of the Allegheny formation, though rare in the "Mercer coal group."

Lesquereux. Boston Jour. Nat. Hist., vol. 6, 1854, p. 426. D. White : Bull. Geol. Soc. Am., vol. 1 1, 1900, pp. 169, 171. [Potts ville group ; Kanawha formation.] Sigillaria cf. reticulata Lesquereux. Non (Steinhauer) Miller.] Second Rept. Geol. Reconn. Arkansas, Philadelphia, i860, p. 310, pl. iii, fig. 2. D. White: Bull. Geol. Soc. Am., vol. 6, 1895, p. 317. [Pottsville group; Sewell formation.]

Brongniart. Dict. Sei. Nat., vol. 57 (Prodrome), 1828, p. 74 (65). Lesquereux: Second Geol. Surv. Pa., Rept. Progr. P (Coal Fl.), vol. 3, 1884, p. 871. [Conemaugh formation.]