EXPLANATION OF PLATES. 



PLATE L 



Fig. L Cacaobranch from which the bark has been eut 

 superficially so that the cankerspot is visible. 

 „ 2. Brancli witli cankerspot eut across, to show the 

 diseolouration penetrating into the wood. 



Fig. 1 and 2 hâve been kindly prepared for 

 this article by Mrs. Saek-Weerman. 



PLATE IL 



Fig. 3. Transverse section of a braneh with a canker- 

 spot; the black parts indicate the extent of the 

 diseolouration in bark and wood. 



„ 4. Longitudinal section from the barkparenchyma; 

 X corkeambium separating the diseased from the 

 healthy tissue. x 225. 



„ 5. Tangential section through the wood, showing 

 the passage of the mycélium in the tracheids 

 and meduUary rays, a and h sinuous mycélium 

 in the medullary rays. X 375. 



„ 6. Conidiophore of Sjncaria. X 560. 



„ 7. Irregular branched conidiophore ofSpicana x 375. 



„ 8. Spicaria?ii y, formed on the mycélium developed 

 from the Fusarium eonidium a. x 375. 



„ 9. Conidiophore with Fusarium conidia, developed 

 from the Spicaria eonidium a. x 375. 



