Plate 4. 



Figs. 1-4. Globigerina sacculifera. (From photographs.) X 40. D2313. Fig- 

 ure 1, dorsal view; figures 2-4, ventral views. 

 5. Globigerina sacculifera. (After Brady.) X 50. Dorsal view show- 

 ing angular and spinose character of last-formed chamber in the 

 adult. 

 Q.lGlohigerina sacculifera. (After Brady.) X 50. "Section of the 

 shell, showing its thickness and the coarse tubulation of the walls." 

 7, 8. Globigerina aequilateralis. (From photographs.) X 40. D2377. 

 Apertural views. 

 9. Globigerina helicina? (From photograph.) X 50. D2262. 



49 



