OU THE LIFE-HISTORY OF THE FORAMINIFERA. 



119 



all that remains of it. He considers that the Globigerina shell 

 is gradually absorbed, and ultimately disappears. With regard 

 to the contained Globigerina shell it was shown that, as in free 

 living Globigerince, its terminal chambers are frequently covered 

 with spines, and that these reach to the Orbulina shell and fuse 



Orhulina universa, bottom specimens, Brady Collection, Globigerina-Orbulina 



series, x 170. 

 a-c. OrbuUnas with contained Globigerina chambers (represented in optical 

 section). These are seen in difierent stages of absorption. The spines are 

 only seen in 6. 



d. An empty Orhulina shell. 



e. A specimen in which the Orbulina shell does not completely enclose the 

 Globigerina chambers. 



