2 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 66 



uable asset to geology. For about half a century he investigated and reported 

 upon the fossil faunas of Trinidad, Tobago, Antigua, Jamaica, and other Antil- 

 lean islands. In this paper references pertinent to the text are made to some 

 of his publications. Dr. G. D. Harris ' has published a reprint of Guppy's more 

 inaccessible paleontogical writings. 



Maury, C. J., A contribution to the Paleontology of Trinidad : Acad. Nat. Sci., 

 Phila. Journ., vol. 15, 2d ser., pp. 23-112, 9 pis., 1912. 

 " The specimens were collected from Tertiary beds at Brighton, on the 

 Island of Trinidad, and from the small outlying islets, Soldado and Farallon 

 Rocks. A few are also included from Cretaceous shales and Pleistocene raised 

 beaches, both on the opposite Venezuelan mainland." 



None of the species occurring in the above deposits were found in the mate- 

 rial examined for my report. 



A number of other writers have contributed valuable information 

 to the geology and paleontology of Trinidad, and their names should 

 be included in a complete bibliography. 



Fossils studied. — Most of the fossils studied were collected by F. 

 W. Penny and J. A. BuUbrook, The localities of the fossil collec- 

 tions are distributed through the east and west-central part of the 

 island in a narrow area on the north slope of the Central Mountain 

 Range, The gastropod fauna is meager from all localities except 

 that obtained from a flood-wash in the vicinity of Brasso. 



Many of Guppy's type specimens from Trinidad are deposited in 

 the United States National Museum and were found useful for com- 

 parison. 



Outline of results. — As the molluscan fauna is poorly represented 

 in most instances, the study of the other organisms and a knowledge 

 of the field relations of these faunal deposits are essential to ac- 

 curately construct the local stratigraphic column and to correlate its 

 units with outside deposits. 



For this reason I have only tentatively assigned the groups of 

 fossils to positions in the stratigraphic column. I have endeavored, 

 wdien possible, to determine the nearest relative of the species studied 

 in outside deposits. 



A general outline of results is about as follows : 



All the faunas considered in this paper are believed to be Miocene. 



The fauna at station 8301, Machapoorie Quarry, and at station 

 8299, Cumuto Road, 17 miles, is believed to be the oldest and is re- 

 ferred to the lower Miocene. 



The fauna collected from the flood-wash in the vicinity of Brasso 

 is very similar to that at station 9219, Guaico-Tamana Road, 2 

 chains east of mile 13, is stratigraphically higher than that at 

 Machapoorie Quarry, and is tentatively referred either to the upper 

 part of the lower Miocene or to the lower part of the middle Miocene. 



The bed from which the specimens collected on the Manzanillan 

 coast were obtained is not stated on the labels, but certain species 

 indicate a middle Miocene age rather than older. 



2 Harris, G. D., Bull. Amcr. Paleont., vol. 8. pp. 149-346, lOlil. 



