Isastrea turbinata 
From the Chert-formation of Antigua, Coll, Geol* Soc, 
Fossilization very like that of Isaatraea. oh long a in the 
British Portland. Oolite, 
A.t-v 
The affinities of these two Corals with the Iaastraea are 
not to be mistaken; and their occurring in the Chert of Antigua, 
where they are associated with the Miocene Astroooenia ornata , is 
very remarkable, 1 * 
