446 



completely defined one; I wish to draw the attention to a 

 recently published article by Colemann'), wlio shows 

 that the Koleroga disease on Areca catechu, according to 

 Cook, identical with that found on coffee, is due to a 

 Phytojjhthora. Moreover I received leaves attacked by 

 candelillo from Venezuela. The fungus occurring on them, 

 shows only a small resemblance to the Pellicidaria as 

 described in the publications already mentioned. Conidia 

 could not be found, so that it was impossible to deny or 

 affirm the identity with any certainty. However I made 

 an accurate comparison between those leaves and the 

 Surinam spécimens. 



In the first place the gênerai appearance dififers greatly. 

 In candelillo the withered leaves hâve a dull grey velvety 

 colour, which I never noticed in silverthread. This colour 

 is caused by small hyphae, standing perpendicularly on 

 the surface of the leaf, which show a very curions growth 

 as may be seen in fig. 9a -cZ. The branchhyphae hâve at 

 their apex almost globular cells, which form in their turn 

 new globular cells, a growth more or less similar to that 

 seen in Saccharomyces. I never saw it in silverthread; 

 the aspect of silverthread under the microscope is shown 

 in flg. 5, while in candelillo thèse typical short hyphae 

 are seen, often united to large bodies of 50 — 100 i-i diameter ; 

 one gets the impression of a greyish body with a crenate 

 margin. Of course the possibility exists that this formation 

 is caused by différent climatic circumstances, though I do 

 not think the climate would differ there so much from 

 that of Surinam. I made several attempts to make cultures 

 from the spécimens sent to me ; notwithstanding the leaves 

 were quite dry, I succeeded in getting some fungus growth ; 



I) L. ColemanD, Department of Agriculture, Mysore Slate, 

 Mycological séries, Bull. 2. 1011. 



