274 



Transactions. 



fungus-infested tissue in the prothallus of L. scariostim occupy a 

 characteristically small proportion of the total bulk of the prothallus. 

 Several old large prothalli showed a right and left portion separated by 



Fig. 45. — Lycopodium scariosum. Young prothallus. X 10. 



Figs. 46-48. — Lycopodium scariosum. 

 Figs. 49-52. — Lycopodium scariosum 



50, 51, and 52, X 5. 

 Fig. 53. — Lycopodium scariosum. Very large irregularly grown prothallus. 



Prothalli. 46, X 6 ; 47, X 6 ; 48, X 

 Large irregularly grown prothalli. 



49, 

 X 6. 



X 8; 



a cleft which extended through the upper translucent tissues well down 

 into the body of the prothallus (figs. 51-53). One of Miss Edgerley's 

 figures also illustrates the same feature. This is probably to be regarded 

 as a pseudo-branching resulting froin the continued and irregular 

 growth in size of the prothallus, it being characteristic of the prothallus 



