//. 



/2. 



22. 



2.1. 



2.2. 



2.2. 



A D E 



Fig. 136, A-E. — Stenostomiim grande. Reduction and destruction of zooids resulting from 

 alteration of dominance; zooids and fission zones numbered according to origin and order of 

 appearance. A, chain of four zooids, sectioned at XX; B-E, stages in reduction and destruc- 

 tion of headless part of zooid /./. and of zooid 1.2. (from Child, 1903&). 



