G . an t i 1 1-arum -11- 
calices are variable in siae, the largest 3 mm., the smaller ones 
about 1.75 mm* in diameter; 2.5 mm. seems to be the average. 
Septa, usually 24 in number, with the mode of fusion 
characteristic of the genus. They are crowded, comparatively 
thick, with narrow interseptal spaces. Septal margins rather 
finely beaded. Synapticula abundant, several rows occur along- 
side one another where the walls are thick. There are no distinct 
pali, but some of the septal dentations around the columella may 
be slightly larger than the other dentation. 
Columella tangle not greatly developed. 
Locality : Island of St. Bartholomew, West Indies, P. T. 
Oieve, Collector. 
Geologic hor i z on : Oligocene, "Limestone of St. Bartholomew." 
Type : A single specimen, University of Upsala. 
Remarks : This species stands alone, its mode of growth 
being strikingly different from that of any of the other Gonioporae . 
