Vol. 55,] Olf THE OCEANIC DEPOSITS OF TRINIDAD. 181 



postponed their publication in deference to Mr. Guppy's request, 

 that gentleman having then recently become aware of sections in 

 South IN'aparima which showed a passage between the Globic/erina- 

 beds and the radiolarian earths, and desiring to publish the fact 

 himself. It was not, however, till May 1897 that a note on the 

 subject was read to the Victoria Institute of Trinidad, and not till 

 August 1898 that this was published. In it Mr. Gruppy briefly 

 mentions that certain exposures show a gradual transition from the 

 Globigerina-TRSiTls (which he calls the Foraminifera-beds) to 

 the radiolarian beds, but he does not in any way discuss their other 

 stratigraphical relations. He remarks that the junction-beds are 

 intermediate in character as well as in position, and he gives a 

 list of some of the foraminifera which they contain, noting that 

 'the abundance of Lagena is remarkable.'^ 



Thus Mr. Guppy and Prof. Harrison agree in giving the same 

 answer to the second of the questions above mentioned, but, as 

 will be seen in the sequel, with regard to the I^ariva Beds, 

 Prof. Harrison differs entirely from Mr. Guppy and agrees with 

 Messrs. Wall & Sawkins ; lastly, he has formed the opinion that 

 the San Fernando Beds are closely connected with, and are probably 

 an upward continuation of, the Nariva Series. He is thus able to 

 present us with a clearer view of the succession in Trinidad, and to 

 correlate the several groups with those in Barbados. 



II. The Geological Sfccession in the Naparima District. 



[By J. B. Harrison.] 



The existence of radiolarian beds in Trinidad has been known for 

 some time, and with respect to their geological position the 

 observations made by Mr. G. F. Franks and by myself^ were in 

 accordance with those of Wall & Sawkins, as expressed in their 

 'Eeport on the Geology of Trinidad' (1860). They regarded the 

 radiolarian beds as overlying the Nariva Series, and we took the 

 same view, with the further opinion that the one series was un- 

 conformable to the other. Mr. Guppy, on the other hand, could not 

 find any evidence of superposition, and expressed the opinion that 

 ' this Nariva Series is not inferior to the Eocene marls of Naparima, 

 but superior to them . . . and partly the equivalent (on the soathern 

 side) of . . . the Caroni Series on the northern.' ^ 



If Mr. Guppy's opinion were correct, the succession in Trinidad 

 would be so different from that in Barbados that no comparison 

 could be made between them. I therefore availed myself of an 

 opportunity which occurred early in 1 895, and spent several days 

 in examining the exposures in the Naparima district. The geology 

 did not appear to be at all complex, the beds seen being (1) red 

 and blue clays referable to the Nariva Series of Wall & Sawkins, 

 (2) grey Globigerina-maTls acknowledged by Mr. Guppy to be of 



1 Proc. Victoria Inst. Trinidad for 1897 [1898] p. 171. 



2 See Quart. Journ. Geol. See. vol. xlviii (1892) p. 218. 



3 Ibid. p. 521. 



