84 Transactions British Mycological Society. 



The hyphae enter the thallus through the rhizoids. Usually 

 only the smooth rhizoids contain hyphae, but occasionally they 

 have been observed in the trabecular rhizoids. In a few cases 



Fig. 2. Anastomosing hyphae in a rhizoid. x 770. 



when infected trabecular rhizoids have been examined these 

 have been found to be "smooth" towards the extremity where 

 the hyphae entered, the peg-like thickenings only being de- 



