PLATE 54 

 Sorosporella uvella: 



A. — General appearance of the thallus when grown on Molisch's medium, showing 

 brainlike convolutions and crateriform structure. Natural size. 



B. — Streak cultxu-e upon beerwort agar, showing shiny gelatinous-appearing, grape- 

 like btmches of mature resting spores, some of which are germinating. X 5. 



