S. G. Paine and W. F. Bewley 



191 



Fi2 4 Trans vpi-se section through the vascular bundle showing the passage of the organ- 

 ism from the cortex to the pith. A. The wood parenchymatous cells undergoing 

 disintegration by the organism. B. Cavity left by the destruction of the middle 

 lamella. C. Wood vessels P. Pith. 



