GLOBIGERINA 



i65 



Fig. 78. — Globigerina (from a Living Specimen) ("Challenger"). 



The central dark mass is the shell (compare Fig. 162, p. 222), from which 

 radiate stiff spines of lime. Round the shell is a bubbly mass of living 

 matter, from which fine granular threads extend between the spines, 

 generally straight, but some curved. 



