90 



PHYCOMTCETEAE 



(1940) with one species M. taylori Sparrow, but since that date a few 

 other species have been described. It is distinguished from Monohlepharis 

 by the behavior of the exogenous oospore which swims free by means of 

 the persistent fiagellum of the fertilizing sperm, becoming encysted after 



B 



i 



Fig. 29. Monoblepharidales, Family Monoble- 

 pharidaceae. Monoblepharella mexicana Shanor. (A) 

 Hypha with zoosporangia. (B) Hypha with oogones 

 and antherids. (C) Oogone just after entry of sperm 

 cell. (D) Zygote swimming away by means of the 

 flagelkmi of the sperm cell. (E) Encysted zygote. 

 (Courtesy, Shanor: Mycologia, 34(3) -.241-247.) 



having progressed some distance. Occasionally in M. taylori the oogone 

 may contain up to four eggs, though one is the more usual number. In 

 M. elongata Springer, in about half of the oogones more than one egg is 

 formed, sometimes as many as eight. (Fig. 29.) 



Looking back from Monohlepharis we can see a fairly unbroken series 



