Magnus. — On A ecidium graveolens ( Shu ttlew . ) . 163 
Fig. 5. Transverse section of young pith, with transverse sections of intercellular 
mycelium-threads. The walls in which the mycelium-threads occur are swollen, 
x 420. 
Fig. 6. Longitudinal section of the phloem of an infected branch of witches’ 
broom. In the elongated cells the haustoria are not knot-like. 
Fig. 7. Medullary ray in transverse section of an infected stem, with mycelium 
and haustoria. x 420. 
Figs 8 and 9. Medullary rays in tangential section of an infected stem, with 
mycelium and haustoria. The walls in which the mycelium-threads occur are 
much swollen, x 420. 
Fig. 10. Tangential section of the very young wood in the neighbourhood 
of the cambium. The cell-contents are plasmolytically contracted, and withdrawn 
from the longitudinal walls, but not from the oblique transverse walls, x 420. 
