SHUMARD — CATALOGUE OP PALEOZOIC FOSSILS. 337 



1847— D. D. Owes & J. G. Norwood. Researches among the Protozoic 

 and Carboniferous Rocks of Central Kentucky made during the sum- 

 mer of 1846 ; 8vo, with a plate. 



1847 — Geo. Engelmann. Remarks on Melonites multipora. — [Amer. 

 Jour. Sci., new series, vol. 3, p. 124. 



1848 — Edward Forbes. On the Cystideaof the Silurian Rocks of the 

 British Islands. — [Mem. Geol. Surv. of Great Britain & Mus. Econ. 

 Geol., vol. ii. 



1848— T. Austin. Observations on the Cystideaof M. Von Buch, and 

 the Crinoidea generally. — [Quart. Journal Geol. Soc. London; Nov., 

 1848 ; p. 291. 



1848 — C. Ferd. Rcemer. Ueber Gegliederte, aus Kalkstiickchen Zusam- 

 mengesetzke Tentakeln oder Pinnulse auf den Sogennanten Ambula- 

 kral-Feldern der Pentremiten. — [Neues Jahrbuch fur Min. und Geol. 

 Leonliard und Bronn, p. 292. 



1848 — John Locke. Fossil Asterias antiquata from Cincinnati. — [Proc. 

 Acad. Nat. Sci. Philad., vol. iii., p. 32, with figure. 



1848 — David Christy. Letters on Geology, being a Series of Commu- 

 nications originally addressed to John Locke of Cincinnati, Illustrated 

 by Geological Sections and Engravings of some New Fossils, in 8vo. 



1848— L. P. Yandell. Note to M. De Verneuil concerning the discovery 

 of calcareous arms in Pentremites flore.alis. — | Bulletin Soc. Geol. de 

 France, tome v., 2e. series, p. 296. 



1848-1849— H. G. Bronn. Index Palaeontologicus oder Uebersicht des 

 bisjetzt bekamten Fossilen Organismen. — [Nomenclator et Enumera- 

 tor Pala?ontologicus, 3 vols, in 8vo. 



1848-1849 — L. Agassiz. Lectures on Embryology. — [Amer. Traveler & 

 Daily Evening Traveler. 



1850— Ferd. Rozmer. Ueber Stephanocrinus, eine Fossile Crinoiden- 

 Gattung aus der Familie der Cystideen. — [Arch, fur Naturgeschichte 

 Jahr. 1850, p. 365. 



1850— G. Troost. A List of the Fossil Crinoids of Tennessee. — [Proc. 

 Amer. Assoc, for Advancement of Science. 



1850 — D. D. Owen and B. F. Shumard. Descriptions of fifteen New 

 Species of Crinoidea from the Subcarboniferous Limestone of Iowa, 

 collected during the U. S. Geological Survey of Iowa, Wisconsin and 

 Minnesota in the years 1848-9. — [Jour. Acad. Nat. Sci. Philad., New 

 Ser., vol. ii., p. 57, in 4to, with plate. 



1850-1851 — A. D'Orbigny. Prodrome de Palasontologie Stratigraphique 

 Universelle des Mollusques et Rayonnes, 3 vols, in 12mo. 



1850-1852 — Id. Cours Elementaire de Palasontologie et de Ge'ographie, 

 Stratigraphique, 3 vols, in 12mo. 



1851 — D. L). Owen & B. F. Shumard. Descriptions of seven New Spe- 

 cies of Crinoidea from the Subcarboniferous Limestone of Iowa and 

 Illinois. — [Jour. Acad. Nat. Sci. Philad., new ser., vol. ii., p. 89. 



1851 — L. P. Yandell. On the Distribution of the Crinoidea in the West- 

 ern States. — [Proc. Amer. Assoc, for Advancement of Science, Fifth 

 Meeting, p. 229. 



1851 — D. D. Owen and B. F. Shumard. On the Number and Distribu- 

 tion of Fossil Species in the Palaeozoic Rocks of Iowa, Wisconsin and 

 Minnesota. — [Proc. Amer. Assoc, for Advancement of Science, Fifth 

 Meeting, p. 235. 



1851 — James Safford. The Silurian Basin of Middle Tennessee, with 

 Notices of the Strata surrounding it. — [Amer. Jour. Sci. & Arts, N. 

 Ser., vol. xit., p. 352. 



1851 — Ferd. Rgbubr. In Verb. Naturh. Ver. fur Rheinl. und Westphal., 

 vol. viii. 



(In this publication Prof. Rneiner has given a description with fig- 

 ures of Agelacrinus Cincinnatiensis. ) 



1851-1856— H. G. Brovn and F. Rujuer. II. G. Bronn's Letluea Geog- 

 nostica oder Abbildung und Beschreihung der 1'iir die Gebirgs-Forma- 



