174 



THE LOWER FUNGI— PHYCOMYCETES 



calary sporangia occur. The papilla of dehiscence is terminal 

 or lateral. Antheridia are unknown but monosporous oogonia 



Fig. 64.- — Leptomitus lacteus (Roth.) Agardh. (a) Regularly constricted 

 thread, showing three consecutive segments which have functioned as swarm- 

 sporangia; the swarmspores shown in motile, encysted, and germinating stages. 

 (6) Constricted hypha showing swarmspores, cellulin plugs, and absence of 

 septa. {After Pringsheim 1860.) 



apparently occur. They have not been satisfactorily studied, 

 and are usually referred to as "resting spores." They are 



