port or icensis sp. nov. 
PI. , figs. 
Cora Hum massive , composed of long valleys, from 5,5 to 
9 mm., wide, and at) out 3.5 mm. deep, separated by acute collines. 
Walls in the collines, rather thick hut simple. 
Septa, rather thick, crowded, about 100 in 5 cm., or 20 
to the cm. Usually alternately shorter and longer, hut in 
some places they are equal. At the wall usually equal in thick- 
ness. The inner ends of some septa are enlarged, and there are 
indications that such septa hear upright paliform teeth. 
Margins dentate. Calicinal centers indistinct. 
Columella absent. 
Localit y : 4 miles west of Lares, Porto Rico, R. T. 
Hill, Collector. 
G-eologic horizon : Upper Oligocene , Pepino formation. 
Type : Ho. , United States national Museum. 
