no 



Bulletin 35 



258 



Page ij8 

 PAPER No. 11. 

 REMARKS ON THE GEOLOGICAL POSITION OF THE 

 POL YC YS TINA BEDS OF SOUTH NAPARIMA. 



Published in "The Agricultural Record", vol. 3, Aug.- 

 Dec. , 1890, pp. 178-180. 



The subject of the Polycystina beds of South Naparima appears 

 to have attracted some little notice of late, for we find com-, 

 munications thereon in the pages of the Agricultural Record. 

 I do not pretend to be well up in all the points of discussion. The 

 few words I have to say will be chiefly directed to the elucidation of 

 the geological position of the polycystina deposits. 



I have not been able to find the first mention of the occurrence 

 of radiolaria in Trinidad rocks. I am told that a paper on the sub- 

 ject appeared in one of the English scientific journals, but I have 

 never been able to find it. The references to the subject in the 

 Geological Report on Trinidad are rather scanty. 



In a paper published in the 22nd volume of the Journal of the 

 Geological Society (1866, p. 571) I gave a diagram of the coast sec- 

 tion at Sanfernando. This sketch was very imperfect on account of 

 the disintegrated materials from the upper part of the cliff having 

 obscured the nature and relations of the beds. Nevertheless, in 

 main features the diagram fairly represents the position and suc- 

 cession of the rocks. I was wrong, however, in supposing certain 

 of these beds to be unfossiliferous. I subsequently discovered that 

 they contained abundant foraminifera, and in 1872 I published an 

 account of of the discovery with a preliminary list of the foramin- 

 ifera. They were as follows : — 



1 These are only found in the lower 

 beds of the Eocene. 



Nummulina ramondi 



— Defr. 



Orbitoides mantelli 



— Morton 



Amphistegina vulgaris 



—Orb. 



Spiroloculina nitida 



—Orb. 



Glandulina Icevigata 



—Orb. 



Nodosaria glabra 



—Orb. 



' ' hispida 



—Orb. 



" raphanistrum 



— Linn. 



' ' ovicula 



—Orb. 



" pyrula 



—Orb. 



Dentalina elegans 



—Orb. 



filiformis 



—Orb. 



" communis 



—Orb. 



Orbu/ina universa 



—Orb. 



Globerigerina bulloides 



—Orb. 



Polyinorphina gibba 



—Orb. 



Rotalia orbicularis 



—Orb. 



" corallinarum 



—Orb. 



\ From the Nodosaria Beds. 

 I 



In the paper referred to, which was published in the December 



