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Bulletin 35 
Page 12 
When a portion of the rock is submitted to heat and 
the asphalte thus driven off, the Nummulites general!}' 
fall into two pieces, each of which, presents a good 
transverse section of the shell, showing very plainly the 
internal structure. Were it not for this curious circum- 
stance it would have been difficult to have obtained sections 
of these shells, as owing to their fragility they would 
scarcely bear the process of grinding down however deli- 
cately conducted. 
Some specimens of Bryozoa have occurred among 
the Orbitoides, but I have not succeeded in detaching a 
specimen. The}' are so brittle that the most careful manipu- 
lation is insufficient to prevent them from falling to powder 
under the hand of the operator. I have not detected any 
other organic remains in the same bed as the Orbitoides 
and Nummulites ; but both above and below it are found 
tertiary fossils probably not of more recent date than the 
Miocene age. I hope to be able to present my obser\'ations 
respecting those fossils in a collected form at some future 
time. Suffice it to say for the present that the evidence 
derived from them does not, so far as I }'et know, militate 
against the presumption of the Middle Tertiary origin of 
the deposits in question. We know too little of the 
Tertiaries of this part of the world to be able to pronounce 
a more decided opinion ; but should the supposition of the 
Pliocene age of this group be shown to be well founded, 
we should have here the remarkable phenomenon of the 
association of an Old-World with a New World form of 
Lower Tertiary Rhizopod in a deposit of Middle Teritary 
age. It would be very possible in that case that the 
homotaxical representatives in Europe of the deposits at 
San Fernando ma}- be found amongst the lowest members 
of the Miocene group. But this observation must not be 
taken to apply to those portions of the Tertiaries which are 
found further inland, at Jordan Hill, St. Croix, and Mont- 
serrat, for instance. The fo.ssils from those places, as well 
as those from Manzanilla, and other parts of the East coast 
of Trinidad, seem to me to belong to a later date. 
P. S. — Since writing the above, I have ob-served in the 
Quarterly Journal of the Geological Society, an account 
of the association of Nummulince with Orbitoides in some 
Tertiary beds in the Island of Jamaica, It seems to me 
very probable that these Nummulince and Orbitoides are 
identical u-ith those found at San Fernando. (Quart. Journ 
Geol. Soc. , vol. 19, p. 514. ) The paper referred to contains 
valuable remarks on the affinities of the Foraminifera 
mentioned. 
