TERTIARY MOLLUSKS FROM THE LEEWARD ISLANDS 



AND CUBA. 



BY CHARLES WYTHE COOKE. 



INTRODUCTION. 



The object of this paper is to describe some little-known Cenozoic 

 Mollusca from the West Indies and to determine their stratigraphic 

 positions with respect to the standard section of the Atlantic and Gulf 

 Coastal Plain of North America. 



The great bulk of the material upon which this work is based was 

 collected by Dr. T. Wayland Vaughan, in the islands of St. Bartholo- 

 mew, Antigua, Anguilla, and Cuba, but several additional smaller 

 collections made by various workers at scattered localities have also 

 been studied. All of the fossils studied, except a small collection from 

 Guajay, Cuba, are in the United States National Museum. The 

 exceptions are in the American Museum of Natural History. 



The writer wishes to express his appreciation of the many courtesies 

 extended to him throughout the course of the work by Doctor Vaughan, 

 to whom he is also indebted for assistance in the final preparation of 

 the manuscript. He wishes to thank Dr. W. H. Dall and Miss Julia 

 A. Gardner for aid in the identification of doubtful species. He is 

 indebted to the authorities of the United States National Museum for 

 the use of the facilities of that institution and to the Director of the 

 United States Geological Survey for permission to carry on this 

 investigation as part of his official duties. 



FAUNAL SUMMARY. 



The species of mollusks and brachiopods described, with the stations 

 at which they were found, are enumerated in the following lists : 



LIST OF STATIONS IN ST. BARTHOLOMEW. T. W. VAUGHAN, COLLECTOR. 



6895. Spur on southeast side of bay northwest of St. Jean Bay, 170 feet above sea-level 

 (aneroid reading). 



6897. Anse Ecaille side of point between Anse Ecaille and Anse Le"zard. From conglom- 

 erate and sandstojie below upper limestone bed. 



6897a. Point between Anse Ecaille and Anse Lizard. 



6897b. Point between Colombier Point and bay next to St. Jean Bay. From a conglom- 

 erate and shaly bed interbedded with limestone, below the main limestone and 

 at top of the conglomerate series of beds. 



6905. Northwest of St. Jean Bay, along sea-face. 



6919. Governors Bay, from limestone picked up on slope. 



6924. Point on northwest side of St. Jean Bay, from bed of limestone at top of described 



section. 



6925. Fossils mostly from conglomerate bed below limestone at top of section, partly from 



lower limestone bed or from just above conglomerate. 



6926. Anse Lizard, basal bed. 



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