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 50 



28 CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 



From these evidences the ferruginous bed does not antedate the Upper 

 Oligocene, but is somewhat older than the asphaltic horizon. 



One mile west of the Godineau River on the shore of the Gulf of Paria, Mr. 

 Veateh found in a whitish, decayed rock moulds of large shells. These to all 

 appearances are freshwater species. Some are almost certainly Unios; for one 

 specimen shows imprints of the alternating hinge teeth so characteristic of that 

 genus. There is also a large convex shell which might be of the genus Anodonta 

 as it has the general form of A. grandis. 



The occurrence of these freshwater shells recalls the Comparo Road fresh- 

 water horizon described by Dr. R. J. Lechmere Guppy and referred by him to 

 the Pliocene. It is more probable, however, that the Godineau River strata 

 are of Oligocene date, but it is impossible to draw any inference as to the true 

 age because of the very imperfect condition of the fossils. 



Near San Fernando, Trinidad, is a small outlying island known as Farallon 

 Rock or Johnson's Island. In a light buff-colored or greyish or even blackish 

 non-asphaltic rock on Farallon are Foraminiferal layers with myriads of Orbi- 

 toides and Nummulites. The curious crustacean, Ranina porifera Woodward, 

 the Helix-like worm tube, Serpula clymenioides Guppy, and the urchin, Echino- 

 lampas ovum-serpentis Guppy also occur. 



The horizon is Lower Oligocene and is a continuation off-shore of the San 

 Fernando Orbitoides formation which also contains the Ranina and Serpula. 



EOCENE FOSSILS FROM SOLDADO ROCK. 



On Soldado Rock, an islet one hundred and seventeen feet high, lying near 

 the Serpent's Mouth in the Gulf of Paria, just west of the extreme southwest 

 corner of Trinidad, Mr. Veateh found a succession of eight beds of which Nos. 

 2, 6, and 8 are fossiliferous. 



The basal bed, No. 2, is an extremely hard, greyish to reddish limestone con- 

 taining quantities of shells which have become an integral part of the rock, from 

 which they have fortunately been brought into high relief by the erosive action 

 of the waves that constantly beat upon them. 



This bed lithologically is the exact counterpart of Midway Eocene beds near 

 Ripley, Mississippi; Fort Gaines, Georgia; and Clayton, Alabama. Some sam- 

 ples from these various localities and Soldado cannot be distinguished from one 

 another, and this resemblance is still more striking when fragments of rock from 

 these widely separated places contain the same fossils. 



The material from bed No. 2 has yielded the following mollusks: 



Ostrea crenulimarginata Gabb. 



Ostrea cynthice n. sp. 



Ostrea cf. percrassa and compressirostris Say. 



Ostrea pulaskensis Harris. 



Ostrea thalassoklusta n. sp. 



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