OP SANTO DOMINGO. 



99 



Tertiary beds of Santo Domingo and Culxa, those of Cumana (Yenezuela), and the 

 Caroni series in Trinidad, the Miocene of Jamaica is to be considered as representing 

 the upper or later part of the West Indian Miocene as at present known ; while the 

 chei't formation in Antigua, the Anguilia beds, and the beds exposed at San Fernando 

 in Trinidad belong to the lower or oldest part of the Miocene." Or as tabulated by 

 Etheridge* it stands thus : — 



" Middle Tertiary Series of St. Domingo 

 " " " Cuba 



" " " Cumana 



Caroni ' ' Trinidad 



Miocene " Jamaica 



Chert formation of Antigua 

 Anguilia beds 



San Fernando beds, Ti'inidad 



Later or Upper Miocene. 



Older or Lower Miocene. 



" I^ot," as Mr. Cluppy observes, " that these divisions should be received as being 

 absolutely equivalent to the lower and upper Miocene of Europe, but merely as marking 

 what seems to be the relative antiquity of the Middle Tertiary or Miocenes of the 

 Western or Caribbean area ;" and " the connection between the formations found in 

 all the localities mentioned could only be shown by a general table, including all the 

 known species from those localities." . 



The next author who wrote on the subject was Dr. Duncan, in the 21st and 22d 

 volume of the Geological Society's Journal. Beyond the mere describing of species, 

 his results are mainly valuable in confirming the middle Tertiary age of the forma- 

 tion, and in corroborating the synchronism of the various deposits. 



For the Geological Survey report of Jamaica (1869), Mr. Etheridge contiibuted 

 an article (Appendix V.) by far the most elaborate and valuable contribution yet 

 made, to our knowledge, of the subject in question. He availed himself fully of all 

 the information accumulated by his predecessors, and appended a table of the dis- 

 tribution of all the known fossils of the Caribbean area, and their correlation with 

 those of Europe. Exclusive of crustaceans, radiates, etc., this list contains the 

 names of 152 species of Mollusca and exhibits their geographical range and geological 

 position at a glance. The Santo Domingo beds have yielded us more than twice 

 that number, and, practically, all that have been found in Jamaica, thereby establish- 

 ing beyond controversy the identity of the formation in these two islands at least. 

 The present collections have so materially changed the correlation between the fossil 

 and living faunae that it is necessary to do the greater part of the work over again. 

 With the object of showing these relations in as intelligible a form as possible, I 

 have prepared the following table, 



* Jamaica Report, p. 312. 



