126 



ERNEST WARUEN. 



geneous dark brown substance (fig. i). These ti'ansfornied 

 yolk-cells possess considerable depolarising power, and 

 appear bright under crossed Nicols. 



Text-fig. 10. 



Paragattya intermedia Warren, x 150. 



Text-fig. 11. 





F 



H 



Paragattya iutermedia Warren, x 1100. 



In Sertularia bidens a single colony was found in which 

 the living tissues had been almost entirely replaced by 

 irregularly shaped, small, black bodies. The colony had 

 succumbed, and it was not possible to learn anything about 

 the histology of the pigmentation. Some sign of pigmentation 



