CAPILLITIAL FORMATION 



SI 



filter paper, kept moist by capillarity, in a damp chamber. Pul- 

 verized rolled oats were sprinkled sparingly over the mobile plas- 

 modium. After feeding on the oats, the plasmodium spread to 



Fig. 12. Stages in growth of plasmodium and transformation into masses 

 of spores in Spongospora subterrajiea within cells of potato tuber. (Adapted 

 from Osbom.) A. Young plasmodium. B. Multinucleate plasmodium at 

 a somewhat later date. C. Aggregation of plasmodium before spore for- 

 mation. D. Mature soral masses of spores. 



the walls of the culture vessel, where it could be removed and 

 daily started anew. 



Capillitial formation. The capillitium and sporanglal wall 

 are constituted of inert material deposited by the plasmodium 

 during transformation into the fructification. Capillitial forma- 



