﻿214 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Fossil corals reported by Duncan from Santo Domingo — Continued. 



It has appeared that perhaps two distinct geologic horizons were 

 represented ))y these collections, one of which is the Nivaje shale and 

 another which is represented by the superficial and tufaceous lime- 

 stones and the silt of the sandstone plahi. The revised list for the 

 Nivaje shale is as follows: 



Revised list of species reported by Duncan from the Nivaje shale. 



Placotrochus lonsdalei Dmican. 

 Paracyathus heneJceni (Duncan). 

 Placocyathus variabilis Duncan. 



