323 
GrrPY Reprint 
175 
I could not obtain much information. But Mr. Raspass ha.s late- 
ly discovered what appears to be the same bed on the Corosal road 
about eight miles inland from Pointapier. As this is the onl}- 
deep-water deposit j'et discovered to the north of the cretaceous 
anticline it is of importance as showing that after their deposition 
in shallow water the cretaceous beds sank to a sufficient depth to 
allow of the deposition of the Ditrupa-bed, which I should sup- 
pose .was deposited in 200 fathoms of water or thereabouts. The 
Foraminiferal Fauna contains some species, e.g. Planorbulina 
larvata Gonatosphaera prolata, Gaudryina pariana, Haplostiche 
soldanii, Cristelaria aculeata &c. , which are not found in the 
Naparima oceanic beds ; while on the other hand some species 
characteristic of the Naparima beds are not found in the Ditrupa- 
bed, for example, Nodo.saria abysorum. Lagenas and Ratalines 
also are comparative!}' rare in the Ditrupa-bed, except Pulv. 
canariensis which occurs in that bed though not found or ver}' 
rare in the Naparima beds. (See my paper in the Proceedings 
of the Field Naturalists’ Club 1893. The exposure of this Dit- 
rupabed discovered by Mr. Raspass is probably not much more 
than a mile from the Spring Vale quarry which yielded the Mio- 
cene Fossils lately de.scribed in the Proceedings of The Society. 
The significant difference in organic contents between the Dit- 
rupa-bed and the Nariva beds shows that the Pointapier cre- 
. Page 32 
taceous ridge separated the two areas at the time of their deposi- 
tion, while the comparatively shallow water area of the Nariva 
beds was marked off from the oceanic beds of Naparima by the 
great Naparima Anticline. It would be highly interesting to 
know the exact relations between the Spring Vale bed and the 
Ditrupabed, for while the former was deposited in water fift}' 
fathoms deep the Ditrupabed was laid down at a depth probably 
of one or two hundred fathoms. It may be observed that every 
discovery of the kind I have referred to in this paper enlarges 
our knowdedge of the geological structure of the country and in- 
volves rectification of previous conclusions. 
