120 BULLETIN: MUSEUM OF COMPARATIVE ZOÜLOGY. 
position and in species from the Orbitoidal horizons previously men- 
tioned by Barrett, Woodward, Duncan, and Wall, and Jones himself 
In the same Report? Jones and Parker described a large foraminiferal 
fauna dredged from the ocean off Jamaica by Barrett, which consisted 
of recent species almost identical with those of the Pteropod marls. 
Neither of these collections contained Orbitoides, Nummulites, or any 
of the more ancient forms of Foraminifera mentioned in the previous lit- 
eraturo. In 1867 Guppy tabulated a few species of Foraminifera from 
the Pteropod marls above referred to and the Orbitoides and Num- 
muling together, and cites them all as coming from “the Upper 
Miocene of Jamaica.”* In 1874 he again tabulated all the Forami- 
nifera from the Pteropod marls and recent dredgings in one group with 
those from the Orbitoidal and Nummulitic horizons, as coming from 
the Miocene of Jamaica.* ; 
Finally, after successively placing the Orbitoidal and Nummulitic 
horizons in the Lower Tertiary, the Upper Miocene, and the Miocené 
respectively, besides mixing them with forms which are definitely 
known to come from entirely distinct horizons, Guppy in 1892 ad- 
mitted > that the San Fernando (Naparima) Orbitoidal and Nummulitic 
beds of Trinidad which he originally considered Miocene were probably 
of Eocene age. Inasmuch as all his references of the Orbitoides beds 
of Jamaica to the Miocene were based upon their supposed resemblance 
to these Trinidad beds, this last conclusion clearly cancels his many 
previous references of the Orbitoidal limestones of the West Indies to 
the Miocene age. 
Fossil Orbitoides were first reported by Barrett in 1860,° from the 
limestones included in our Blue Mountain Series, and these fossils were 
stated by him to be “of Cretaceous age in Jamaica,” " Specimens 
from his collections were sent to England, where they were studied and 
commented upon by Woodward, T. Rupert Jones, Duncan and Wall, 
and others.? 
1 Jones and Parker, British Association Report, 1863, p. 80. 
2 Ibid., p. 105. 
3 Proc. Sci. Association of Trinidad, December, 1867, p. 167. 
4 Geological Magazine, London, 1874, p. 21. 
5 Quart. Jour. Geol. Soc. London, Vol. XLVIIT. p. 520. 
$ In a report referred to by the Governor of Jamaica, in the first message of 
February 7, 1860, printed in Jamaican Reports, 1869, p. 76, he says that Orbitoide? 
are Cretaceous in Jamaica, 
7 Jamaican Reports, p. 76. 
3 See references following. 
