Goniopora port oricensis sp. nov 
PI. , figs. 
Corallum ramous , "branches rounded in cross-section or 
compressed, a "branch of the taller form is 34 mm. wide with 
A * > 
a maximum thickness of about 9 mm. 
Calices polygonal, shallow, usual diameter 2 mm. The 
outer ends of the septa are flattened and fused together, sepa- 
rating the calicular depressions by a wall about .5 mm. thick. 
Septa delicate, very perforate, in three complete cycles. 
Pali appear to be poorly developed, not specially differentiated 
from the ordinary septal dentations. 
Columella weakly developed. 
Locality: 4 miles west of Lares, Porto Rico. R. T. 
Hill, Collector. 
Geologic horizon : Upper Oligocene, Pepino formation. 
Uo . 
Types : 
United States Rational Museum 
