1590 FUNGI. 
days a little obtuse tube is protruded through the epispore, 
bearing at its apex long fusiform bodies, which are the sporules 
of the first generation. These conjugate by means of short 
transverse tubes, after the manner of the threads of Zygnema. 
Afterwards long elliptical 
sporules of the second gene- 
ration are produced on short 
pedicels by the conjugated 
fusiform bodies of the first 
generation. (Fig. 89, ss.) 
Ultimately these sporules of 
the second generation germi- 
nate, and generate, on short 
spicules, similar sporules of a 
third generation. (Fig. 89, 
st.) 
In Ustilago (flosculorum) 
germination takes place 
Fic. 89.—Germinating pseudospore (q) of readily in warm weather. The 
Tilletia caries with secondury spures in con- germ tube is rather smaller 
clair: at its base than further on. In 
from fifteen to eightcen hours the contents become coarsely 
granular; at the same time little projections appear on the 
tube which are narrowed at the base, into which some of the 
protoplasm passes These ultimately mature into sporules. 
At the same time a terminal sporule generally appears on the 
threads. Secondary sporules frequently grow from the primary, 
which are rather smaller, and these occasionally give rise to a 
third generation. 
In Urocystis (pompholygodes) the germinating tubes spring 
exclusively from the darker central cells of the clusters. From 
these are developed at their extremity three or four linear 
bodies, as in Tilletia, but after this no further development has 
as yet been traced. It may be remarked here that Waldheim 
observed similar conjugation of the sporules in some species of 
di. (1847), p. 113; Tulasne, second memoir, in ‘‘ Ann. des. Sci. Nat.” ii, (4me 
sér.), p. 77; Cooke, in ‘‘ Journ. Quekett Micro. Club,’ i. p. 170. 
