UNITED STATES NATIONAL MUSEUM BULLETIN 215 



STUDIES IN 



FORAMINIFERA 



By ALFRED R. LOEBLICH, Jr., and COLLABORATORS: 



HELEN TAPPAN, J. P. BECKMANN, HANS M. BOLLI, 

 EUGENIA MONTANARO GALLITELLI, J. C. TROELSEN 



SMITHSONIAN INSTITUTION • WASHINGTON, D. C. • 1957 



