PLATE i 



(All figures approximately x 80) 



a, dorsal view ; b, side view ; c, ventral view 



Figs, ia-c, 2. Globotruncana area (Cushman). Hypotypes, from S.4, Abou Saboun 

 section, showing variation in the degree of development of the ventral keel on the last chambers. 



P-455*7 



Figs. 3a-c. Transitional stage between Globotruncana area (Cushman), and Globo- 

 truncana convexa Sandidge ; from S.23, W. El-Sharawna section. P. 45517 



Figs. 4a-c. Globotruncana leupoldi Bolli. Hypotype, from S.18, W. El-Sharawna 

 section. P.45545 



Figs. 5a-c. Globotruncana cf. convexa Sandidge. Hypotype, from S. 20, W. El-Sharawna 

 section. P. 45526 



Figs. 6a-c. Globotruncana sp., from S.20, W. El-Sharawna section. P. 45566 



