1870. 417 [Winchell. 



1850. Hall: Foster & Whitney's Rep. L. Sup. L. Dist., II., p. 285. 

 1850-1. Murray: Canad. Geol. Rep., p. 29. 



1851. Christy: Proc. Amer. Assoc, v. 76. 

 " Whittlesey. lb., 207. 



1853. Owen (D.D.): Geol. Rep. Wis., Min.. and Ind., pp. 92, 95, and Map. 

 1853. Marcou: Geol. Map of U. S., Explanation and Text, p. 33. 



1855. Swallow: Mo. Geol. Rep., I., 101. 



" Marcou: Geol. Karte der Yerin. Staaten, Peterm. Mittheil, p. 149. 



" Shumard (B. F.): Mo. Geol. Rep., II., 137, 185. 



" Meek: Mo. Geol. Rep., II., 218. 



" Norwood & Pratten: Jour. Acad. Nat. Sci. Phil. [2] III., 254. 



1856. Owen (D. D.): Ky. GeoL Rep., I., 89. 

 " Saflford: Geol. Reconn. Tenn,, 158. 



" Murray: Can. Geol. Rep., 1853-6, p. 129. 



1858. Stevens: Am. Jour. Sci., [2] xxv., 262. 



" Marcou: Geology of North America, &c., Zurich, 



" Hall: lo. Geol.' Rep. [I] 88, and [II] 517. 



" Owen (D. D.): GeoL Recon. Ark., I., 87, &c., 135. 



1859. Newberry: Ohio Agricultural Rep. 1859, Pamphlet on the Rock Oils 



of Ohio, p. 6. 



1860. AVhite: Jour. Bos. Soc. N. Hist., vii., 209, Sep. 

 " Lyon: Trans. St. Louis Acad. Nat. Sci., I., 620. 

 " Worthen: lb., 571. 



" Swallow: lb., 635. 



" Meek and Worthen: Proc. Acad. Nat. Sci. Phil.; Sep., p. 447. 



" Winchell: Detroit Tribune, Dec. 11 (Summary of Results of Mich. 



Surv.) 

 " Winchell: Chicago Tribune, Dec. (Lecture before Chicago Academy 



of Sciences, on Excursion to Ann Arbor.) 



1861. Winchell: Mich. Geol. Rep., Aug. (Advance sheets.) 



" Meek and AVorthen: Amer. Jour. Sci. [2] xxxii. ; 167 (Sep). 

 " Hall: xiii. Rep. N. Y. Reg., 96. 



1862. White and AVhitfield: Proc. Bos. Soc; viii., 280 (Feb). 

 " White: Proc. Bos. Soc, ix., 8 (Apr). 



" Swallow: Trans. St. Louis Acad. Sci., II., 81 (Apr). 



" Winchell: Amer. Jour. Sci. [2] xxxiii., 352 (May). 



" Winchell: Proc. Acad. Nat. Sci. Phil., Sep., 405. 



" Hall: Canadian Nat., vii., 377 (Nov). 



" Hall: XV. Rep. N. Y. Regents, 107 (Nov). 



" Jewett: xv. Rep. N. Y. Regents, 198; and Amer. Jour. Sci., [2], 



xxxiv., 418. 

 " Hall: XV. Rep. N. Y. Regents, 81. 

 " Dawson: Quar. Jour. Geol. Soc Lond., xviii. 

 " Owen (R.): Ind. GeoL Rep., 92, 108, &c. 



1863. Winchell: Proc. Acad. Nat. Sci., Phil., Jan., p. 3. 

 " Winchell: Amer. Jour. Sci. [2] xxxv., 61. 



" Logan: Geol. Can., 387, 404. 



" Hall: Pamphlet; Repubhshed in xvii. Rep. N. Y. Reg., 18C5, p. 50. 



