0* megalaxona -48- 
diagnosis of the species* The recent Astraea Pleiades, a 
Pacific form, is the only known species with a low septal number 
and fissiparous growth; it differs from that just described in 
its costal arrangement, but is more closely allied to it than to 
any other Coral. 
From the Chert -format ion of Antigua* Coll* Geol* 3oc* H 
