2 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 



Cretaceous deposits of similar age from Europe and elsewhere. 

 Since d'Orbigny's work in 1840, such authors as von Hagenow, 

 Geinitz, Reuss, Alth, Schwager, Egger, Beissel, Franke, and others 

 have described many species from the European Upper Cretaceous. 

 This literature has been carefully studied, together with abundant 

 material from the Upper Cretaceous of Ireland, England, France, 

 Holland, and Germany, and the striking resemblance of American 

 deposits to those of Europe has been constantly emphasized. As a 

 result very few new forms have had to be described from this 

 Trinidad material. Occasional striking forms seem to be new, but 

 they are the exception. 



The Upper Cretaceous, especially of the Gulf Coastal Plain of 

 the United States, is of great economic importance to the petroleum 

 industry in geologic correlation. The entire region of the Gulf of 

 Mexico and the Caribbean Sea was during Upper Cretaceous times 

 an area of general deposition of the Upper Cretaceous. Though this 

 Trinidad material is from deeper water than most of the Gulf 

 Coastal Plain deposits, nevertheless it contains many species in com- 

 mon with those deposits, and this paper should therefore be useful 

 in connection with studies now being pursued of the various Creta- 

 ceous regions of the Western Hemisphere. 



The plates are from drawings of Trinidad specimens by Miss 

 Margaret S. Moore. 



In order that available literature of recent years on the Cretaceous 

 of America may be available to students, a list of these publications 

 is given here. Many references to these will be found in the syn- 

 onymy under the various species. 



Even a slight examination of the European and other literature 

 will show that later authors have diverged widely from the original 

 description and figures given by the earlier authors who described 

 many of the Cretaceous species. As a result it has been felt wise in 

 many cases to give only the first reference to a species. The follow- 

 ing papers will be of use to anyone working with American Creta- 

 ceous material : 



A. BIBLIOGRAPHY OF PAPERS ON THE FOKAMINIFERA (EXCLUSIVE 

 OF ORBITOIDIDAE) FROM THE AMERICAN UPPER CRETACEOUS 



Bagg, R. M. 



1898. The Cretaceous foranunifera of New Jersey. U. S. Geol. Surv. Bull. 

 88, pp. 1-89, pis. 1-6. 

 Carman, Kathekine. 



1929. Some foraminifera from the Niobrara and Benton formations of 

 Wyomiuff. .Tourn. Pal., vol. 3, pp. 309-315, pi. 34. 

 Carsey, D. O. 



1926. Foraminifera of the Cretaceous of central Texas. Univ. Texas Bull. 

 2612, pp. 1-56, pis. 1-8. 



