Some Questions which they Suggest. 



61 



From these discontinuous pieces of protoplasm there are 

 subsequently developed in the top of the column a 

 terminal head, and on the successive lower stages of 



FIG. 21. Immature FIG. 22. Polysphondylium 



Sporangium of Poly violaceum. a and * successive 



sphondy Hum violaceum. stages in ripening of Sporan- 



(After Brefeld.) gi um . (After Brefeld.) 



