22 
Dorothea C. E. Marryat. 
interesting in the light of what was noticed in the cultures of 
Pleurotus (cf. Fig. 8). Finally these terminally-borne spores 
may form tufts indistinguishable from a true conidial form, this 
being specially striking in the case of Fistulina. 
Brefeld concludes by endeavouring to trace up in detail the 
morphological relationships between all these different forms. He 
gives numerous and excellent figures of the various kinds of spores 
found in the different species, the chlamydospores of Nyctalis (Plate 
VI., Figs. 12, 13, etc.) bearing a very close resemblance to those 
described in the present paper. 
Cambridge Botanical Laboratory. 
November , 1907. 
EXPLANATION OF FIGURES ON PLATE I. 
The figures are all from drawings made with the aid of a Camera Lucida, 
and are X about 500. 
Fig. 1. Loose chlamydospores filled with oil-drops. 
Fig. 2. Chlamydospores germinating in hanging water-drop after twenty-four 
hours. 
Fig. 3. Ditto after forty-eight hours. 
Fig. 4. Ditto after three days, the hyphas are beginning to branch. 
Fig. 5. Ditto after six days, the hyphae have formed chlamydospores and 
clamp-connections. 
Fig. 6. Ditto after seven days, showing spores forming immediately beneath 
the mother-spore, which is now quite empty. 
Fig. 7. Branched mycelium produced from chlamydospores sown in hanging 
drop of Gelatine and 10% Grape Extract, after ten days. The clamp- 
connections show well. 
Fig. 8. Spores produced terminally at the ends of short branches ; from 
hanging drop-cultures of Gelatine and Grape Extract, sixteen days 
old. 
Fig. 9. Spore-bearing hyphas teased out from small piece of mycelium from 
infected block. 
