336 TRANS. OP THE ACAD. OP SCIENCE. 



1839— J. G. Anthony. Fossil Encrinite from the Blue Limestone of Cin- 

 cinnati. — [Amer. Jour. Sci., vol. 35, p. 359. 



1840-1841— T. A. Conrad. Annual Reports on the Palaeontology of New 

 York. 



1840— D. D. Owen. Report of a Geological Exploration of Iowa, Wiscon- 

 sin, and Illinois, made under Instructions from the Secretary of the 

 Treasury of the United States in the autumn of the year 1839. 



1842 — D. D. Owen. Regarding Human Eootprints in solid Limestone. — 

 [Amer. Jour. Sci. & Arts, vol. xliii.. p. 14. 



1842— Ebenezer Emmons. Geology of New York. Part II., compris- 

 ing the Survey of the 2d Geological District. In 4to, with figures. 



1842— Lardner Vanuxem. Geology of New York. Part III., compris- 

 ing the Survey of the 3d Geological District. In 4to, with figures. 



1842— Dr. A. Clapp. Geological Equivalents of the Rocks of the Falls of 

 the Ohio.— [Proc. Acad. Nat. Sci. Philad., vol. i., p. 177. 



1842 — T. A. Conrad. Observations on the Silurian and Devonian Sys- 

 tem of the United States, with Descriptions of New Organic Remains. 

 — [Jour. Acad. Nat. Sci. Philad., vol viii., part 2, p. 228. 



1843 — D. D. Owen. A Catalogue of Geological Specimens illustrating 

 the Formations of the Ohio Valley. 



1843 — T. A. Conrad. Observations on the Lead-bearing Limestone of 

 Wisconsin, and Descriptions of a New Genus of Trilobites and fifteen 

 New Silurian Fossils.— [Proc. Acad. Nat. Sci. Philad., vol. i., p. 329. 



1843— J. Hall. Geology of New York. Part IV., comprising the Survey 

 of the 4th Geological District. In 4to, with figures. 



1843 — F. De Castelnatt. Essai sur le Systeme Silurien de 1'Ame'rique 

 Septentrionale; in 4to, with plates. 



1843 — T. Austin and T. Austin, Jr. A Monograph on Recent and Fos- 

 sil Crinoidea — in 4to, with plates. 



1844-46 — F. J. Pictet. Traite Ele'mentaire de Palajontologie, ou His- 

 toire Naturelle des Animaux Fossiles; 4 vols, in 8vo., and 1 vol. of 

 Plates in 4to. 



1844 — D. D. Owen. Report of Geological Exploration of Iowa, Wiscon- 

 sin, and Illinois, made under Instructions from the Secretary of the 

 Treasury of the United States in the autumn of the year 1839; in 8vo, 

 with plates. 



1844-45— Id. Review of the New York Geological Reports. — [Amer. 

 Jour. Sci., vols. 46-49." 



1845— L. Von Buch. Ueber Cystideen, Eingelcilet durch die Entwick- 

 elung der Eigenthiirnjclikeiten von Caryocrinus ornatus, Say. — [Ab- 

 hand. Kon. Akad. Wiss. zu Berlin. 



1845 — I. N. Nicollet. Report intended to illustrate a Map of the Hy- 

 drographical Basin of the Upper Mississippi River. 



1846 — G. Graham, J. G. Anthony, and U. P. Jamkb. Two Species of 

 Fossil Asterias in the Blue Limestone of Cincinnati. — [Amer. Jour. 

 Sci., new ser., vol. i. 



1846 — J. G. Norwood and D. D. Owen. Description of a Remarkable 

 Fossil Echinoderm from the Limestone Formation of St. Louis, Mis- 

 souri. — [Amer. Jour. Sci., 2d series, vol. ii., p. 225. 



1846 — E. De Verneuil. Note sur le Parale'lisme des Depots Paleoziques 

 de 1'Ame'rique Septentrionale avec ceux de l'Europe, suive d'un Ta- 

 bleau des Especes Fossiles communes aux deux Continents avec l'in- 

 dication des Etages ou elles se rencontrent, et terminee par une Exa- 

 men Critique de chacune de ces especes. — [Bull. Soc. Geologique de 

 France, 2e. ser., i.-iv. 



1846— John Lockk. On an Asterias from the Blue Limestone of Cincin- 

 nati.— [Proc. Acad. Nat. Sci. Philad., vol iii., p. 32. 



1847 — L. P. Yandell & B. F. Shumard. Contributions to the Geology 

 of Kentucky, in 8vo, with a plate. 



1847 — James Hall. Natural History of New York, Part VI.; Paleontol- 

 ogy, vol. i., in 4to, with numerous plates, 



