P. tenui 
- 6 - 
The delicate tabulae and the patency of the inter tabular 
spaces distinguish this species. It is interesting to observe 
in the same specimen portions without coenenchyma and portions 
with it, especially as these two conditions are considered generic 
in Palaeozoic corals! Pocillopora crassoramosa , nobis, has much 
coenenchyma; and so has P« .Jenkins! , Reuss, its nearest ally, 
from Java. 
