(2) Several tubes are quickly developed, tliese 

 grow rapidly and produce the mycelium. The 

 successive systems diminish in size. In this 

 stage the mycelium is unicellular ; nuclei, 

 protoplasm and vacuoles abound. When it 

 has covered an area of a few inches, growth 

 ceases. 



(3) The protoplasyn becomes more granular and 

 darker, and collects towards the middle of the 

 mycelium. 



(4) The conidiophores are erected out of the fluid 

 as thick unicellular filaments ; while this is 

 going on the mycelium developes septa. 



(5) The conidiophore at its free end swells into a 

 head, which is cj^uickly supplied by the dense 

 protoplasm from the mycelium, the protoplasm 

 being replaced by cell sap. 



(6) The wall of the columella is developed. 



(7) The conidia are developed by free cell 

 formation. 



(8) The conidiophore rapidly elongates. 



(9) Dehiscence takes place and the spores are 

 dispersed, which in their turn germinate. 



The time occupied from germination to maturity 

 is about three days. 



In Ftloholus, another of the Mucorini, the sporan- 

 gium remains intact, but when ripe becomes detached 



