DESCEIPTIONS OF TERTIAEY FOSSILS FEOM THE 

 ANTILLEAN REGION. 



By E. J. Lechmeee Guppy, F. L. S., F. G. S., 



Port-of- Spain, Trinidad, 



and 



William Healey Dall, 



Honorarij Curator of the Department of Mollusks. 



Some time since, tlie United States ISTational ^Museum acquired by 

 purchase the collection of Autillean Tertiary fossils made by the senior 

 author of this paper, containing many types and also some new but 

 undescribed forms. Mr. Guppy forwarded descriptions of the latter 

 for publication in the Proceedings of the United States National 

 ^Museum. Owing to the absence of named collections and works of 

 reference in Trinidad, some changes were necessary to prepare the 

 paper for printing, and at Mr. Guppy's request I have revised the 

 manuscript, supervised the prei)aration of the figures of the new spe- 

 cies, and added descriptions of some other new forms in the National 

 Musenm collections from the same region. 



The sources of the fossils are as follows: 



Pliocene. — The marls of Moen, Costa Eica, and vicinity afford many 

 finely preserved Pliocene fossils, which have been collected and 

 described by W. M. Gabb, and from which E. T. Hill has also obtained 

 some material. 



Miocene. — Beds in the Isthmian region, and also in Jamaica, and the 

 Caroni beds of Trinidad have long been referred to the Miocene, from 

 their obvious relations to the so called Miocene of Bordeaux and Dax; 

 others of analogons age were discriminated by me from the Chesapeake 

 Miocene of Virginia, Maryland, and Florida under the name of the 

 Chipolan or Old Miocene. Subsequent studies have shown that all 

 these beds, including those of Bordeaux, are referable to what is now 

 known as the Oligocene or uppermost Eocene horizons. No strictly 

 Miocene strata have yet been discriminated in the Antillean region, 



Proceedings U. S. National Museum, Vol. XIX— No. 1110. 



303 



