G, dec aturensis -26- 
Gonicpora decatureneie v ar» siliceasi© var.nov. 
Pi. , fig. 
This is a specimen 113 mm, long, 54 mm* wide and 20 mm, 
thick. The upper surface is slightly undulated, there is one 
deep depression but it may have been caused by a burrowing animal 
or may have been corroded* 
The calices are larger than in typical G , de cat urens is 
\ 
2.5 to 4 mm* in diameter. The septa are decidedly thin and the 
texture light and fragile. 
This specimen is quite similar to G , c alh o u n e n sis , its 
difference consisting mostly in that of form. 
Locality ; 5 miles below Bainbridge, Georgia, 
Geologic horizon : Upper Oligocene, Bainbridge chert. 
Type : United States national Museum 
