250 BOTANICAL GAZETTE [September 



and their irregular outline suggests that they may be amoeboid 

 in character. No appearance has been seen which would suggest 

 the presence of cilia. The lower cell is surrounded by a very thin 

 membrane which, in a few specimens, is made visible through the 

 shrinkage of the protoplasm; but no indication of this division 



which is continuous from 



summit 



examined are, as has been mentioned 



mature, and the distal region is filled 



packed spores, except in the individual represented in fig. 28, from 

 which the contents has for the most part escaped through a rupture 



at the base. 



determine 



ment 



place the basal cell enlarges so as to fill the cavity, and again cuts 

 off a terminal cell which divides as before, or whether there is but 

 one such period of sporulation in the history of an individual. It 



from a comparison 



mass 



1m 



mass may be pushed slowly out by pressure from the enlarging 

 basal cell which, after it has filled the whole cavity, cuts off an 

 upper portion which divides into spores that are again pushed out 

 by the further growth of the cell below. Such a process would 



exam 



hich 



sporangia empty completely through the swarming of the zoospores 

 at the moment of maturity. Unless the spores of the present 

 type are actively amoeboid, some mechanical means for emptying 

 the sporangium, like that above suggested, seems necessary, since 

 there is no indication that the spores are furnished with cilia. 



organism 



similar 



acters. 



much sm 



form 



material is at the moment 



New Eng 



s com- 



monly on a variety of insects and rarely on Laboulbeniae infesting 



