FUNGI : SA PROLEGNIA . 



125 



Fig. 136. 



Fertilization in saprolegnia, tube of antheridium carrying 

 n the right-hand figure a smaller 

 egg. (After Humphrey and Trow.) 



the nucleus of the sperm cell 



, e 



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

 nucleus of the e 



Fig. 137- 

 Branching hypha of Peronospora alsin 



Fig. 138. 



Branched hypha of downy mildew 

 of grape showing peculiar branching 

 (Plasmopara viticola). 



