St. antiguensis -17' 
tween the ealices# Costae quite often are well developed, there 
may he as many as 18 to 20 around a calico; they have rather 
coarse granulations along their courses; in some instances, only 
granulations are seen on the coenenchymal surface. Ho elevated 
ridge between the ealices was perceived# 
There are six large septa, reaching the columella, and 
usually six well developed members of the second cycle, occasion- 
ally one of this cycle may extend to the columella. The septal 
margins are never prominent, quite often or usually they do 
reach the level of the surface of the coenenchyma. Dissepiments 
present • 
The columella with a roundish tip, does not quite reach to 
the level of the rim of the oaliee. 
Types . U . S. National Museum, 3 specimens (1. ¥. Spencer 
Collector) • 
Localities . ---Ant igua, West Indies, and Bridgetown, Barbados, 
West Indies. 
Geologic her i z on .---Basal Upper Oligocene 
