STRATIGRAPHIC SIGNIFICANCE OF THE SPECIES. 



115 



The probable age of each of the echinoid-bearing localities in Cuba 

 will now be briefly reviewed. 



Consolacidn del Sur: The one species of echinoid, Clypeaster antil- 

 larum, found at this locality occurs both in Antigua and Anguilla, 

 but the mollusks are more similar to those of Anguilla than to those 

 of Antigua. 1 This locality, therefore, is probably of Anguillan age. 



Candelaria: Echinolampas lycopersicus is common in Anguilla but 

 very rare in Antigua, and it is not certain that the specimen from 

 Antigua came from the Antigua formation. The probability is that 

 this locality is also at the Anguillan horizon. 



Guajay: Although Clypeaster antillarum found at this locality 

 occurs both at the Antiguan and Anguillan horizons, the presence 

 there of Ostrea haitiensis 1 indicates a horizon higher than the Antiguan. 



Havana: In and around Havana are geological formations of several 

 different ages; there are certainly deposits of Pleistocene, Miocene, 

 and Oligocene age, and perhaps deposits of older age. It is, there- 

 fore, highly important to know the stratigraphic relations of beds 



1 Cooke, C. W., Carnegie Inst. Wash. Pub. No. 291, p. 109, 1919. 



