156 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
* 39. Hopewell, lower reef between Lucea and Montego, Jamaica: 
Meandrina, sp.; Siderastræa radians, (Pallas) ; Orbicella acropora, (Linn-); 
Porites porites, (Linn.) ; Madrepora muricata, Linn., forma cervicornis, 
Lam. 
“50. Soboruco cut in railway, Orange Bay, old Soboruco : Orbicella 
radiata, (Ell. and Sol.). 
“54. Soboruco, Runaway Bay: Orbicella acropora, (Linn.). 
“71, One mile west of St. Ann Bay; Lower Soboruco : Orbicella 
acropora, (Linn.) ; Siderastreca sp. 
* 93. Corals from stratified limestone, Mulatto Bay, (Manchioneal 
Beds) : Orbicella acropora, (Ell. and Sol.) ; Orbicella radiata, (Ell. and 
Sol.) ; Meandrina, sp. 
* Manchioneal Bluff, “same as other reefs,’ ? 
PART IV. 
Geologic and Topographic Evolution of the Island. 
In the preceding chapters wo have set forth the general geographi? 
features and the details of composition, structure, and paleontology, and 
arrived at conclusions by whose use the events accompanying th? 
geologic and geographic evolution of the island can be more intelligently 
reviewed. 
Upon the table (page 143) we have summarized this history in * 
manner that will enable the reader to follow what will now be se 
forth in detail. A short sketch of the principal events of its history 
will now be given, including, first, a brief outline of the events, next, 
an interpretation of their magnitude. 
The known history of Jamaica begins with the expiring days of th? 
Cretaceous period. What part the present locus of our island play“ 
in the earlier events of the battle between sea and land preceding thi? 
epoch cannot at present be stated, but we do know that in late Creta 
ceous time its crests appeared above the waters, and that in succeeding 
epochs grew more and more conspicuous. 
The vast accumulation of rolled igneous pebble of hornblende” 
andesites and volcanic tuffs, which constitute the oldest known roo 
of Jamaica, prove clearly that in late Cretaceous time volcanic erupti 
ity was active at or near the island during their formation, while the 
colonies of peculiar fossils interbedded at intervals in these rocks 
the time of their origin as the latest epochs of tho Upper Cretace 
ks 
fix 
ous 
