1. Orthophragmina pustulata, n. sp. Oblique section. X 16. Cuba, Station 3448. 



2. Section of rock from Cuba, Station 6125, showing vertical sections of Orthophragmina crassa, 



n. sp. (large), O. cubensis (small at bottom), and 0. subtaramellei, at right. X 16. 



3. Section of rock from Cuba, sections of Orthophragmina cubensis. X 16. 



4. Section of rock from Cuba, Station 3476, showing several sections of Orthophragmina cubensis, 



n. sp. on right and one of O. crassa, n. sp. on left. 



