28 i 
Guppy Reprint 
133 
shells and pebbles are included in a calcareous paste or matrix 
formed by the destruction of shells and other calcareous or- 
ganisms. 
2. vSpeci:\ie.v.s from Botanic Station. 
“This is an im])ure Limestone with small pebbles derived 
from the older rocks of Tobago. It contains numerous shells 
but not in recognizable condition. One Fo.ssil however is with 
little doubt, the Atra patrida of the Haitian Deposits and this I 
think fixes the age of the Stratum as miocene. The deposit was 
a shallow-water one. 
3. Specimens from Mount Irvine. 
“The specimens are Lime.stone of a different kind to those 
from the other localities — they have more of a stalagmitic 
character. They have been picked up on the .seashore as they have 
recent marine organisms adhering to them. This Lime.stone was 
probably deposited inside a coral reef or in the lagoon or space 
between the reef and the shore. 
Conclusion. 
“The existence of miocene strata in the Island of Tobago is 
indicated. More inve.stigation would be required before a more 
definite opinion could be given. Doubtless better specimens of 
the Fo.ssil.s will be forthcoming in time. The material from the 
Botanic Station would be suitable for burning for lime and if in 
sufficient quantity for the purpose it might be profitable. 
“On a short vi.sit I paid to Tobago some years ago, I re- 
marked that the Geolog}' was of an interesting character and 
highly de.serving of investigation. I had however neither time 
or means to investigate it.’’ 
R. J. Lechmerk Guppy. 
Glen.side, Tunapuna, Trinidad, 
29th July, 1901. 
Note .- — In No. 26 of Vol. V. Bulletin, page 335 Mr. Guppy 
kindly favored us with a preliminary Report. At page 362 there 
is a further .short note on a Fossil Oy.ster al.so found in Tobago. 
—(Ed.) 
