

FIG. 96. Stages in the reproduction 

 of the microspheric form of Poly- 

 stometta crispa. In a the protoplasm 

 is streaming out of the shell ; in b 

 and c it is becoming divided up 

 into amoebulsc ; in d the amoebulae, 

 having each formed a single- 

 chambered shell, are dispersing 

 in all directions, abandoning the 

 empty shell of the parent. From 

 Lister, drawn from photographs 

 of one specimen attached to the 

 walls of a glass vessel. 



