Schneider : Chroolepus aureus a lichen 433 



structure as a ''cellulose cap," without explaining its nature and 



use. 



There seems to be httle doubt that the network described rep- 

 resents a fungus symbiotically associated with the alga Chroolepus 

 aitrens. This association appears to be sufficiently constant to 

 warrant placing this structure, heretofore classed as an alga, with 

 the class Lichenes. The fungal symbiont does not appear to 

 develop spores or any of the other special structures found with 

 the fungal symbionts of the majority of lichens. 



UNtVERSTTY OF CALIFORNIA, DEPARTMENT OF PHARMACY. 



