208 
24. 
25. 
26, 
oF 
28. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
TRANSACTIONS OF THE ROYAL CANADIAN INSTITUTE  [VOL. xI 
Tschirch, A.: Die Chemie und Biologie der pflanzlichen Sekrete. 
Leipzig, 1908. 
Tubeuf, C. von: Beitrag zur Kenntniss des Hausschwammes, 
Merulius lacrymans. Centralbl. f. Bakt., Paras., und Infekt. 
Pt. 2, Vol. 9: 127-135, 1902. 
Weir, J. R.: New Hosts for some Forest Tree Fungi. Phytopatho- 
logy, V: 71, I9I5. 
Zellner, J.: Chemie der héheren Pilze. Leipzig, 1907. 
Zopf, W.: Die Pilze, 1890. 
DESCRIPTION OF PLATES: 
1. A 45-year old fruit of Fomes officinalis nearly 60 centimetres 
high, collected from a living Pinus monticola by Mr. D. R. 
Cameron. 
2. A one-year. old fruit, 5 cms. wide, from Pinus Strobus. 
3. A 15-year old fruit, 30 cms. high, collected from a living Pinus 
Strobus by Mr. G. W. Bartlett. 
4. A tube of mycelium, slitted along one side and opened up, 
40 cms. long, collected from a hollow in the axis of a log of 
Pinus Strobus. 
5. A longitudinal section of an 8-year old fruit, 14.4 cms. high, 
collected from Pinus Strobus. This shows a characteristic 
areolation of the context. 
6. Section through a matrix of mycelium in which fragments of 
decayed wood are embedded. Taken from a log of Pinus 
Strobus in which it was in continuation with the mycelium 
shown in Fig. 5. Horizontal diameter is 9 cms. 
7. Typical decay of Pinus Strobus caused by F. officinalis. Speci- 
men is 24 cms. long. 
8. Part of a specimen similar to the one used in Fig. 7, smoothed 
and photographed. About 2.5 x. 
g. Transverse view of a specimen similar to the one used in Fig. 8. 
10. A part of the specimen used in Fig. 9. About 2.5 x. 
11. Typical decay of Pseudotsuga mucronata caused by F. officinalis. 
Specimen is 13 cms. high. 
12. A piece of white pine decayed by F. officinalis and then weath- 
ered. Length 32 cms. 
13. Transverse section of Pinus Strobus decayed by F. officinalis. 
14. A longitudinal section of the same as Fig. 13. 
15. A portion of the fruiting mycelium of Polyporus sulphureus from 
a culture. 
