of the Banana caused by U stilaginoi della oedipigera. 365 
Haustoria. I only met with the most simple type found in Ust. 
musaeperda , viz. the flat, saucer-shaped haustoria. 
Pseudo-pycnidia. Those found in the Ust. oedipigera are not so circum- 
script as those of the Ust. musaeperda. They contained, as in the latter, 
mainly chlamydospores. 
Mycocecidia. These structures did not present any difference. 
Enzymes. Here, again, we are faced by two enzymes of similar action. 
I must call attention to the fact that the action of the proteolytic enzyme is 
far less apparent than in the former fungus ; it did not prove capable of 
softening the hyphal walls, as was seen in the first case ; but since the same 
changes do take place in the one case as in the other, it is plain that the 
conditions under which the enzyme is acting in the plant are different from 
those under which the experiment is carried out. 
Hyphal walls. These were found to be composed of chitin, with a 
small percentage of reducing carbohydrate. No pectin could be demon- 
strated. 
The results of the inoculation experiments will be communicated 
later on. 
Final remarks . At the start I said that the disease is not a serious 
one, because it does not spread to any extent, but it becomes even less so 
when it proves to be easily coped with. At least, the manager of the 
United Fruit Co., who had been experimenting for some time with CuS0 4 
solution, found it capable of perfectly checking the spreading of the disease. 
And that is what might be expected in the light of what was said before as 
to the way in which infection takes place. For if it occurs at the base of the 
outer leaves, i. e. epigeally, then it is easily understood how the spores, &c., 
lying on or little below the surface of the soil, may be easily destroyed with 
a CuS0 4 solution of sufficient strength. 
EXPLANATION OF FIGURES IN PLATE XXX. 
Illustrating Mr. E. Essed’s paper on the Surinam Disease, a condition of 
Elephantiasis of the Banana. 
Fig. 1. Section through base of leaf, explained in text, x 255. 
Fig. 2. ( a ) Branching of mycelium ; ( b ) slimy exudation from tips of hyphae ; ( c ) chain of 
chlamydospores and oidia. 
Fig. 3. Conidial fructification. 
