a parasitic Fungus on Sugar-Cane and Cacao . 701 
Fig. 7. Culture-tube, showing the passage of mycelium from the hanging-drop 
to the water on the floor of the moist chamber in a four-days-old culture 
of a spore obtained from a diseased cane. A similar development was noted 
in cultures of spores obtained from a diseased cacao branch. Nat. size. 
Fig. 8. Mycelium from a seven-days-old hanging-drop culture in a resting 
condition. The darker hyphae are olive green in colour, and contain numerous 
oil-drops ; the others are empty, x 375. 
Fig. 9. a. Stages in the formation of spores in a pycnidium from a ten-days-old 
culture on oak-wood. 
b. A portion of the hymenium of a pycnidium from the same culture, showing 
conidia and paraphyses. (The parent spore of this culture was obtained from 
a sugar-cane.) x 375. 
Fig. 10. A portion of a cacao branch attacked by the Fungus (which has been 
kept in a moist chamber for a short time), showing the pycnidial colonies breaking 
through the bark. Nat. size. 
Fig. 11. Transverse section through a pycnidial colony bursting through the 
bark of a cacao branch. The second pycnidium on the left hand shows the 
ostiole. Zeiss, a a. 
Fig. 12. Portion of a tangential section of a cacao branch, showing the mycelium 
passing through pits in the walls of the vessels. A portion of a medullary ray is 
shown on the right-hand side. The mycelium is brown, and shows numerous 
oil-drops. Zeiss. E. 
Fig. 13. Stages in the germination of a spore obtained from a pycnidium 
on a diseased cacao branch. The sowing was made at 2 p.m., Dec. 18 : a, at 
4.5 p.m. ; b, at 4.45 p.m. ; c, at 6.45 p.m. ; and d, at 11 p.m. the same day. Temp. 
27~29°C. At 7.0 a.m., Dec. 19, there was a copious development of a branched, 
rarely septate mycelium in the drop, which was far too complicated for me to 
draw. a,b, c x 375; d x 60. 
