280 
S. Reginald Price. 
2. The mycelium grows slowly taking about two months to 
appear after spore-infection. “Oidia” are generally produced in 
large numbers by the mycelium, after a few months’ growth. 
3. Sterile fructifications of a peculiar form developed in a large 
number of cultures kept in dull light. 
4. Mycelial growth was generally stronger in darkness than in 
dull light, and was much feebler in bright light. No fructifications 
were produced in cultures kept in darkness nor in bright light. 
5. The germination of the spores and penetration of wood was 
followed on wood slips in pure culture. 
6. The destruction of the wood by the fungus in pure culture 
was investigated. Considerable delignification occurred from the 
lumen outwards and the middle lamella remained intact. 
7. Inoculations of Elm trees, both with mycelium from pure 
culture and also with spores, have been made. 
In conclusion, I wish to record my very best thanks to Mr. 
P. T. Brooks for his continued interest and help in the work, and 
also to Mr. C. G. P. Laidlaw for help with the photographs. 
Botany School, 
Cambridge. 
June, 1913. 
LITERATURE REFERRED TO. 
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Biol., Vol. 3, 1908, pp. 1-22. 
2. Brefeld O. “ Untersuchungen aus Jem Gesamtgebiete der Mykologie.” 
HeftS. 
3. Brooks, F. T. “ Notes on Polyporus squamosus Huds.” New Phyto- 
logist,” Vol. 8, 1909. p. 348. 
4. Brooks, F. T. “Silver-leaf disease.” Journ. Agric. Sci., vol. 4, 1911 
pp. 133-144. 
5. Brooks, F. T., and Bartlett, A. W. “Two diseases of gooseberry 
bushes.” Ann. Mycol., Vol. 8, 1910, pp. 167-185. 
6. Buller, A. H. R. “ Biology of Polyporus squamosus Huds.” Journ. Econ. 
Biol., Vol. 1, 1906, pp. 101-138. 
7. Buller, A. H. R. “ Researches on Fungi.” London (Longmans), 1909. 
8. Lakon, G. B. Bot. Zeit., 1908, Abt. 2, p. 25. 
9. Pfeffer, W. “ Physiology of Plants.” Eng. ed., Vol. 2. 
10. Potter, M. C. “ On the occurrence of cellulose in the xylem of woody 
stems.” Ann. Bot., Vol. 18, 1904, pp. 121-140. 
11. Price, S. R. “ Preliminary note on Polyporus squamosus .” Proc. Camb. 
Phil. Soc., Vol. 17, p. 168. 
12. Spaulding, P. “ Studies on the lignin and cellulose of wood.” Rep. 
Missouri Bot. Garden, Vol. 17, 1906, pp. 41-58. 
13. Swanton, E. W. “ Fungi and how to know them.” London (Methuen) 
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14. Ward, H. M. “ On the biology of Stereum hirsutum (Fr.).” Phil. Trans, 
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