SPHJEBOPLEA ANNULINA 



5/1 



themselves together again; and they soon assume a. globular or 

 ovoidal shape (b), whilst at the same time definite openings (c) are 

 formed in their containing cell-wall. Through these openings the 

 antherozoids developed within other cells gain admission, as 

 shown at No. 12, d; and they become absorbed into the before-men- 



c s** i\ ,-> Vi 



' ; 



FIG. 431. Development mid reproduction of Sphcsroplea. 



tioiied masses, which soon afterwards become invested with a firm 

 membranous envelope, as shown in the lower part of No. 12. These 

 undergo further changes whilst still contained within their tubular 

 parent-cells, their colour passing from green to red ; and a second 

 investment is formed within the first, which extends itself into 

 stellate prolongations, as seen in No. 13; so that when set free 



