194 FOURTEENTH ANNUAL REPORT. 



Ehkenbekc, C. G. Verbreitung und Einfluss des mikroskopischen Lebens 

 in Sud und Nord Amerika. <Abhand. d. Akad. d. Wiss.zu Berlin (1S41), 

 pp. 2'.il-445; 4 plates. 1843, 



Ehkenj'.eug, C. G. Report on the species of Infusoria contained in speci- 

 mens of the sediment of the Mississippi river. <^Astrtnoin. Obser. Nat. 

 Obser. Wash., vol. Ill, appendix B. Observations on the Mississippi 

 River at Memphis, Teun., pp. 26-32. 1853. 



EHitENBERG, C. G. Die weitere Entwickelung Kenntniss des Grundsandes 

 als grune Pol3'thalamien-Steinkerne, ueber braunrothe und corall-rothe 

 Steinkerne der Polythalamien-Krede in Nord Amerika, und ueber den 

 Meeresgrund aus 12,900. Fuss Tiefe. [The further development of the 

 discovery that the green sand is composed of green casts of polythalmia, 

 also on the brownish-red or bright-red casts of polythalmia in chalk of 

 North America, and on the sea bottom at depths of 12.900.] Monats- 

 bericht d. kk. Akad. d. Wiss. Berlin, 1855, pp. 172-178. 



The chief point in this paper is that the brownish .or reddish "challi'" of Alabama 

 owes its color to numerous shells of Foraminifera filled with a similarly colored silicate 

 of iron. Nicholson in White and Nicholson's Bib. p. 98.) 



Ehrenbekg, C. G. Erlauterungen ueber den Grunsand im Zeuglodon-Kalke 

 Alabam's in Nord- Amerika. [Investigations into the green sand of the 

 Zeuglodon limestone of North America.] Monatsbericht d. k. k. Akad. d.- 

 Wiss. Berlin, 1855, pp. 86-89. 



The author shows that the grains of green sand interspersed in the Zeuglodon-lime- 

 stone of Alabama are really of the nature of casts of the shells of Polythalamons 

 Foraminifera. At least thirty different forms were recognized by the author. (Nichol- 

 son in White and Nicholson's Bib. p. 98.) 



Ehrenberg, C. G. Beitrag zur Uebersicht der Elemente des tiefen Meeres- 

 grundes im Mexicanischen Golfstrome bei Florida. Monatsber d. k. pr. 

 Akad. d. Wiss. Berlin (1861), pp. 222-240; tabIe.^ 1862. 



Fabricius, O. Fauna Groenlandiiie, systematice sistens animalia Groenlan- 

 dite occidentalis hactenus indagata, etc. Hafnise et Lipsia\ 1780. 



G.'iBB, W. M. Descriptions of new species of American Tertiary and Creta- 

 ceous Fossils. Journ Acad. Sci., Phila. n. s., vol. iv, pp. 375-406, pi. 



ixix; 1860. 



Gabb, W. M. Catalogue of the Invertebrate Fossils of the Cretaceous for- 

 mation of the United States, with references. Proc. Acad. JVai. Sci., 

 PMa., 1859, 20 pages. 1860. 



Gabb, W. M. Description of a Collection of Fossils made by Dr. Antonio 



Raimondi in Peru. <Journ. Acad. Nat. Sci., Phila., vol. viii, pp. 263- 



336. 1877. 

 Galeotti, H. G. Sur le calcaire Cretace des environs de Jalapa au Mexique. 



<^BuU. de la Societe Geol. de France, vol. x. 8 vo. Paris. 1839. 

 Gkinit/., H. B. Carbonformation und Dyas in Nebraska, -r: Acta Academia 



Leop. Carol., vol. xxxiii, pp. 1-91; 5 plates. 1866. 

 FuBulina depressa, Fischer. F. cylindrica, Fischer. 



