279 



Oct., 1874,) a further account of the West Indian tertiary fossils 

 with a list of all the species of invertebrates (except corals) known 

 up to that time from the tertiary rocks of the West Indies, leav- 

 ing out the most recent formations whose fossils are all or nearly 

 all of living species. Since then some other fossils have been 

 described by the late Professor W. M. Gabb* and by myself ; f 

 but until the late discussion arose on the microzoic rocks of 

 Trinidad and Barbados the only name to be added to the list of 

 forty-four foraminifera recorded from six West Indian localities 

 was Tinoporus 2}ilci')'is Brady, a fossil fi'om Jamaica, Cumana and 

 other places. 



The gradual accumulation of evidence on the subject of the 

 relative age of the West Indian geological formations led to the 

 conclusion that the fossiliferous beds of Naparima and Manzanilla 

 in Trinidad ought to be separated from the miocene deposits of 

 Haiti, Jamaica and Cumana as of distinctly older date and con- 

 taining a decidedly ditl'erent fauna. Consequently in my paper 

 of 1874 just quoted the name Eocene is used for these older 

 beds. J There still remains in Trinidad a considerable series of 

 fonnations (the Caroni series) • having fossils similar to those of 

 the miocene beds of Haiti, Jamaica and Cumana. 



In my paper published in the " proceedings of the Scientific 

 Association of Trinidad" for December, 1 *77, I gave a diagram to 

 show the general succession of the rocks of Trinidad. According 

 to that diagram and the explanation thereof the rock-foi'mations 

 of Trinidad are in ascending order as follows : — 



(abed) Caribean group (paleozoic) 

 (e) Compact Limestone (Devonian?) 

 (/) Secondary Rocks (Cretaceous) 



(ff) Eocene of Naparima (including the Foraminifera-beds) 

 {g') Eocene of Manzanilla 

 (A) Miocene of Guaracara (Nariva Series) 

 (A') Miocene of South Naparima (including the Radio- 



lai'ian Marls) 

 (h") Miocene of Savaneta, Point Noir ttc. (Caroni series) 

 (A"') Miocene and Pliocene (probably the latter in most 



part) of Moruga, Mayaro, &c. 

 (i) Postpliocene (including the " Detrital Series") 



Though the diagram was very rough and susceptible of much 



*Trans. Amer. Phil. Sec. vol. xv p. 49, and Proc. Acad. Nat. Sci. 

 Phil. 1872 p. 270. 



tQuart. Journ. Geol. Soc. vol. xxxii 1S76 p. 516. 



JOn this point see Cleve, Kongl. Svenska Vetenskaps-Akad. Handl. 

 Band ix No. 12 (1871), and Annals New York Academy of Science vol. ii 

 (1881) p. 190 ; also Cotteau on West Indian Fossil Echinoderms, Kongl. 

 Svenska Vetenskaps-Akad. Handl. Band, xiii, No. 6, (1875). 



