86 British Uredinee and Ustilaginee. 
observed. The spores collected in June germinated in 
December, after being placed in water from three to five 
days. 
Thecaphora—The germination of 7. hyalina has been 
investigated by Woronin.* He found that spores collected 
in August germinated in October and November, after 
~fourteen to eighteen days’ maceration in water, but older 
spores did not germinate at all. Each spore is provided 
with a germ-pore in the epispore, which is pale in colour 
and free from any of the verrucosities which occur upon 
the other parts of the epispore. Every germ-tube becomes 
filled with protoplasm, and generally contains four nuclei. 
It becomes septate, and each compartment contains one 
of the nuclei. From each segment of the promycclium 
narrower lateral branches are given off. Those from the 
upper compartments tend to grow downwards, while those 
from the lower, on the contrary, grow upwards. If one 
of the upper branches comes in contact with one of the 
lower, they unite at their ends and form a bow-like conju- 
gation. From this a long germ-tube is given off, into the 
end of which the protoplasm is passed. No spore-formation 
was observed. 
I have made many attempts, but have always been 
unsuccessful in getting the teleutospores of this species to 
germinate. 
Brefeld,f in an allied species (7. /athyrz, Kiihn), found 
promycelia, at the end of which spherical promycelial spores 
were formed. These promycelial spores in nahrlésung 
germinated and produced a mycelial mass, which in turn 
also produced spores upon those of its branches which 
came in contact with the air. 
Tilletia—The germination of Z7lletta triticd has been 
* Woronin, Joc. cét., pp. 21, 22, t. iii. figs. 19-28. 
+ Brefeld, /oc. cit. pp. 134-138, t. xi. figs. 2-12. 
