SPORODINIA 247 



a. The primary membrane of the gametes, which remains 

 thin, but persistent as an external covering. 



b. The epispore, which is a dark-coloured firm or brittle 

 layer with hemispherical wart-like outgrowths from the surface. 



c. The endospore, which is thicker and more transparent. 

 Note how numerous though irregular are the septa in 



the mycelium which has produced zygospores. 



It is not an uncommon thing in Sporodinia to find that the 

 two gametes may not come in contact, and no zygote be found ; 

 but still each gamete may develop into a body resembling a 

 zygospore in the character of the wall, the contents, and in the 

 mode of germination. These bodies are called azygospores. 



