168 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
PART V. 
, 
Relations of the Jamaican Formations to those of Adjacent 
Regions. 
Having given every known evidence of paleontology, geologic struc 
ture, and geomorphology bearing upon Jamaican history, and having 
presented the conclusions in the preceding Part, this work would not 
be complete without an attempt to point out the extension of the de 
scribed phenomena throughout the adjacent Great Antilles and othe 
regions of Tropical America, where similar or related geological forma 
tions and topographic features of the land and sea should be found. 
While the facts to be set forth in the present Part make no pretension! 
to finality or completion, they will be a further contribution to the sub 
ject which will assist whoever may hereafter take up and continue thes? 
investigations, 
I must leave the discussion of the biologic and oceanographic phas 
of the question to others, and in this place I shall endeavor to discus? 
only the testimony of the stratigraphy and structural geology, present 
ing a brief conspectus of the extent throughout the adjacent rogionó 
of formations similar to or identical with those found upon the island 
of Jamaica, together with remarks on the source of the material. In 
Part VI. I shall review the history of the deformation, including the 
evidences of elevation, subsidence, and degradation, which often occurre 
? tho ; i 
synchronously in different parts of the region, and finally make d 
inquiry as to their influences upon the present land and submarip? 
configuration of the West Indian region. 
The regions with which comparison will be made will be: (1) ny 
Great Antilles proper, including the Virgin Islands and the Bahama” 
Plateau ; (2) The Caribbee Islands ; (3) Barbados; (4) The Venezuel? 
coast of South America, including Trinidad ; (5) The Central America 
region, including the Isthmus of Panama and Yucatan peninsula, an 
the Guatemala-Chiapas or Tehuantepec Province; (6) The Coastal Pla? 
of Mexico and the United States. 
In these presentations I shall be able to show that the Jamaica? 
sequence, so far as it reaches backward in time, is remarkably li 
that of all the Great Antilles, and may be distinctly termed t 
Antillean type. This type presents great lithologic variation fte 
that of the peripheral coast lands of the American Mediterranean, Nd 
