Further Observations on the Fungus present in 
Pellia epiphylla, (L.) Corda. 
BY 
W. F. F. RIDLER, M.Sc. 
With three Figures in the Text. 
T HE distribution, isolation, identification, and physiological relationship 
to its host of the fungus present in Pellia epiphylla have been described 
Fig. i. Cells of Pellia epiphylla with hyphae and vesicles, indicating method of 
penetration of the cell-walls, x 290. 
in a previous paper (Ridler, 1922 ). Some additional observations are 
recorded here. 
Behaviour of the fungus in cells of the thallus. By reason of its light- 
brownish colour, the zone of cells occupied by the fungus in the thallus of 
[Annals of Botany, Vol. XXXVII. No. CXLVII. July, 1923.I 
