142 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Retreat consist of single pieces of a delicate branching, indeterminate 
coral a Conus, resembling C. solidulura Guppy,' a Tellina, and large 
Tubula casts of a Teredo ? 
The only fossils from these beds which I have been able to have 
identified are the Foraminifera, of which Bagg has recognized the fol- 
lowing species from Cinnamon Hill: Orbitoides dispansus, Sowerby ; 
Orbitoides sp. undetermined ; Operculina complanata, Defr. 
Of these species Dagg says that the first is Eocene, and the third 
rare in the Cretaceous and abundant in the Eocene, He remarks that 
Brady has said that the “Miocene” of Jamaica contains the latter 
form. Inasmuch as we have shown that the “Miocene of Jamaica" 
of previous writers meant anything from Eocene to recent, this de- 
termination is of no value. Bagg adds that “ This bed is Eocene.” 
Careful collecting should be made from these beds, although the 
material is of such à poor character that paleontologists to whom it 
has been shown consider it too poor for determination. The fossils 
and the material in which they occur are of comparatively deep water 
character, — more shallow than the Montpelier, but deeper than the 
Bowden. 
The position of these beds below the Bowden clearly indicates that 
they antedate the latter in age, and for the present we can only say that 
their affinities are with the Montpelier beds of Eocene age. ; 
The conditions of subsidence which made the deposition of the Mont- 
pelier and Brownstown white limestones possible were undoubtedly 
sufficiently great to drown the pre-existing littoral faunas of Jamaica ; 
and this epoch ended the old insular life conditions of the earlier epochs 
and separated it from that of the later and succeeding epochs, which 
assumed a more cosmopolitan character. 
The fossils of this horizon practically embrace all the forms which 
hitherto have been described by the English paleontologists, from the 
“White Limestone,” the “Yellow Limestone,” the “Upper Mioceno,” 
“Lower Miocene,” “ Miocene,” and Bowden Beds, by Moore, Etheridge, 
Duncan, Guppy, and perhaps others, and referred to the Miocene, Upper 
Miocene, and Lower Miocene age by those writers, and finally placed in 
the Upper Oligocene by Dall. 
In résumé we can now say that the hemera of the Orbitoidal fauna of 
Jamaica is as follows: Orbitoides have been reported in the Hippurites 
limestone of the parish of St. Thomas by Barrett, Woodward, Jones, and 
Etheridge, and we have shown their occurrence in abundance in the 
1 Quart. Jour. Geol. Soc., Vol. XXIL, Pl. XVI. Fig. 1, 1866. 
