G • dec at u re ns i s 
.Off, 
Goniopora decaturensis var. caeruleif ont is var.nov. 
PI. fig. 
This is a small specimen, apparently attached Toy its 
whole lower surface, and rounded above. Length 16.5 mm., width 
13.5 mm., thickness 7 mm. 
Caiices excavated, 3 mm. in diameter, distinctly de- 
limited by meinb rani form walls. Upper edge of wall usually acute. 
Septa thin, with delicately dentate margins. 
This specimen resembles very closely G, tampaensis, 
differing from the latter by having thinner walls and thinner 
septa. 
Locality t Blue Springs, 5 miles below Bainbridge, Flint 
Biver, Georgia. 
Geologic horizon : Upper Oligocene, Bainbridge Chert. 
Type : United States National Museum. 
