G. decaturensis -23- 
Ollgooene of Georgia. 
Goniopora decaturensis sp. 
PI* , figs. 
Corallum lame Hi form or with a lateral expansion far 
exceeding its thickness. The specimen selected as the type is a 
portion of a corallum, 90 mm* across and about 23 mm. thick. An- 
other specimen is 49 mm, long; 35 mm* wide; and 7.5 mm* thick* 
The upper surface is plane or undulate. When the corallum is 
foliaceous it may he irregularly flexed. 
Calices shallow, superficial or only slightly excavated. 
Polygonal, the usual diameter 2^5 to 3 mm* The wall Mien some- 
what worn usually has a memb rani form appearance, being almost 
continuous, interrupted in places, but forming a quite distinct 
boundary between adjacent calices. In other instances there may 
be no well defined boundary to the calices. In the peripheral 
portion of the interseptal loculi frequently two rows of synaptlcula 
reinforce the wall 
