TEKTIAEY MICROZOIC FORMATIOITS OP TRINIDAD. 541 



Mr. J. W. Gregory stated that the conclusions as to the truly 

 deep-sea origin of some of the Trinidad rocks stated in an appendix 

 to the paper agreed with those just announced by Dr. Hinde. He 

 remarked on the great interest of the geology of Trinidad, as that 

 island occurs at the intersection of the two main Caribbean lines of 

 movement, viz., that along the Cordillera of Venezuela, and the later 

 one along the Antillean chain. It was from Trinidad that evidence 

 as to the exact correlation of the Cainozoic deposits of this area 

 might be expected, for a series of shallow-water beds containing 

 mollusca there occurred below deep-sea beds almost identical in 

 character with those of the Oceanic series of Barbados. The 

 speaker expressed doubts as to the value of the evidence on which 

 some beds both in Trinidad and St. Bartholomew were assigned to 

 the Eocene. 



Mr. Yaughan- Jekn-ings said that, as regards the value of forami- 

 nifera in determining the age of "West Indian beds, specimens had 

 been sent over to this country containing Orhitoides of Eocene facies 

 (Orthophragmium, Mun.-Chal.) associated with Gypsina globulus, 

 JPatellina ( = Orhitolina) concava, and Haplostiche Soldanii. Of the 

 last two species, the former was regarded by European geologists as 

 Cretaceous only ; the latter as a type in the ' Pteropod Marls,' 

 probably Miocene. The difficulty was probably only due to the 

 deficiency of accurately localized specimens and stratigraphical 

 horizon, but it was worth mentioning as showing the difficulties 

 which attend the work of ' microzoic ' palaeontologists at home. 



Dr. Him)E also spoke. 



2p2 



