FUNG/: SAPROLEGNIA. 



125 



Fig. 136. 

 Fertilization in saprolegnia, tube of antheridium carrying 111 the nucleus of the sperm cell 

 to the egg. In the right-hand figure a smaller sperm nucleus is about to fuse with the 

 nucleus of the egg. (After Humphrey and Trow.) 



Fig- i37. 

 Branching hypha of Peronospora alsinearum. 



Fig. 138. 

 Branched hypha of downy mildew 

 of grape showing peculiar branching 

 (Plasmopara viticola). 



