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fonn made its appearance in the cultures. Cultures derived from the 
conidia of the Spicaria- form reproduced the same form in four or five 
days, and after some weeks the Fusarium- form appeared in small 
quantity. Cultures derived from the Fusarium-iorm produced both 
the Spicaria- form and the Fusarium-iorm simultaneously. Pure 
cultures were obtained and used for inoculation. The results which 
attended the progress of the growth in the cultures showed that 
Nectria diversispora was possessed of two conidial forms and the 
Nectria. 
The conidia of the Fusarium- form and the Spic aria-form were 
obtained for inoculation from the pure cultures of which eighteen had 
been prepared and studied. Three modes of inoculation were 
employed ; one consisted in applying conidia and mycelium from a 
culture on to the freshly tapped surfaces of healthy four-year-old 
trees and keeping the surfaces moist for four days; the second con- 
sisted in removing small squares of the bark to the depth of the 
latex layer, allowing the exposed tissues to remain for a few hours, 
when any latex which had exuded from the wound was removed! 
transferring conidia and mycelium to the exposed tissues and repla- 
cing the square Of outer bark in position. The third consisted in 
cutting by means of an oblique cut down to the wood on the one- 
month-old and two-months-old tapping surface, and transferring 
conidia and mycelium to the cut surfaces of the wood. In the two 
last named methods the trees were healthy and were ten years of age; 
control cuts were made on each tree and all of the cuts were kept 
moist for six days. The ascospores were obtained by crushing ripe 
perithecia in a small quantity of recently boiled distilled water and 
transferring them to the wounds; they were employed for inoculation 
in the second and third methods. Altogether eighteen trees were 
employed, six being used for each of the methods described above ; 
and in the second and third series each tree was inoculated at three 
wounds with conidia of the Spicaria- form, with conidia of the 
Fusariu ui-form and with ascospores of the Nectria , making nine 
inoculations on each tree, At the end of eight weeks the inoculations 
were examined. In those of the first series no effect could be observed 
on the tapping surface ; in those of the second series the wounds were 
healing, and the squares of bark which had been replaced in the 
cuts were being forced out by the healing of the wounds ; in those of 
the third series the wounds were healing well. A further exami- 
nation at the end of ten weeks failed to show any symptoms of 
disease.. It was concluded that the fungus was incapable of inocu- 
lating either at the newly tapped surface or at a wound on the trunk. 
These results serve to corroborate Petch’s conclusions as to the 
harmless nature of the fungus. 
Stilbella Heveae * was described by Zimmermann from Java in 
1902 on branches of Hevea. This fungus, or a species which in its 
characters and measurements is indistinguishable from it, occurs 
"* Renamed Stilbum Heveae Sacc. and D. Sacc. 
