Pr ot ethmos b art o lomae i . 
Columella spongy, composed of twisted and fused continua- 
tion, of the inner ends of the septa. The upper surface of the 
columella is sunken in a rather deep axial fossa. 
Locality: Island of St, Bartholomew, West Indies, P. T. 
Cleve, Collector, 
Horizon : 
Type : University of Ups ala. 
remarks : I have referred to this species one other 
specimen labeled by Duncan M Trochosmi 11a sub cur vat a ” , and nine 
others triat I found in the collection. Two of these nine were 
used in preparing thin sections; the type specimen was cut 
twice and the surface was polished. Two specimens, besides 
the type are figured to show variation in form 
