G . tenuis -l! 
denoe, while the existence of the pores in the walls points also 
in the same direction. The difficulties can perhaps he regarded 
as mere questions of degree. 
"The specimens "belonging to the Geological Society are 
from the "Marl formation, the Inclined Beds and Chert" of Antigua, 
and from "the Silt of the Sandstone plain," San Domingo * They 
were placed by Duncan in the genera St o p fc an o c o e n i a and Rhodaraoa ; 
with the fo Hirer identification I can not at all agree," 
Goo log 1. c h o r i s on . - - -Upper Oligocene* 
Additional collections must be made in Antigua and they 
must be carefully studied before a decision can be reached as to 
what this coral really is 
