He t e t hra o s an t i 1 larum , ap • nov » 
PI. , fig. 
Corallum cornute, slightly curved in the plane of the 
shorter transverse axis, cross-section elliptical. Greater 
diameter of the calice, .20 mm. ; lesser, 17 mm.; height, 33 mm. 
\Vall worn, hut shows low costae corresponding to all the 
septa. Intercostal furrows pitted and in some instances appear 
to he perforate. Ho epitheca. 
Septa, about 64, rather thick, with the first two cycles 
and some tertiaries, and in some instances every other septum 
reaching the columella. Septal margins headed, the lamellae are 
only slightly perforate. Synapticula well developed. 
Columella with coarsely papillate upper surface. Calicular 
fossa shallow. 
Locality ; St. Bartholomew, West Indies, P. T. Sieve, 
Collect#*!. 
Geologic horizon : 
