1194 Wisconsin Academy of Sciences, Arts, and Letters . 
gelatinous and the hyphae break up into an indefinite number 
of segments. Dangeard found it impossible at bis time to de¬ 
termine the number of nuclei in the segments and it was only 
with difficulty after the walls were put in that the two nuclei 
could be seen in each young spore. From his observations on 
IT. Tragopogi be feels justified in assuming that these two nuclei 
fuse. The germination of the spores of this species is the same 
as that for the other Ustilagos he had already described. 
In Doassansia Alismatis, Dangeard describes the spores as 
usually produced as short branches on the principal filaments 
although some may be intercalary. These branches then be¬ 
come rounded or elliptical. The first ones produced are at the 
interior of the spore mass while the younger ones are always on 
the outside. Each spore encloses two nuclei which later fuse. 
Spore germination was not followed any further than to find 
that it was similar to that of Tilletia and Urocystis. 
Entvloma Glaucii, he found, forms its spores either apically 
or perhaps intercalary. The two nuclei of each young spore 
later fuse. 
The spore balls of Urocystis Violae are difficult to follow in 
their origin but after their formation the fertile cells in the 
centre each have two nuclei while the sterile cells on the outside 
are described as not having any. The two nuclei of the fertile 
cells fuse. In germination a non-septate promycelium is 
formed containing eight nuclei derived by the three fold division 
of the original spore nucleus. There are eight uninucleated 
sporidia as a rule, although there may occasionally be fewer. 
Dangeard describes only the cytology of the germination of 
the spores in Tilletia Caries. A non-septate promycelium is 
formed containing eight nuclei derived as in Urocystis Violae 
by three divisions from the original spore nucleus. Eight 
slender conidia are borne in a crown at the apex of the promy¬ 
celium. While the conidia fuse in pairs the nuclei do not seem 
to do so. In the secondary conidia there are always two nuclei, 
produced by the division of the nucleus of the primary co- 
nidium. As will be seen from the above, Dangeard’s work re¬ 
lates almost entirely to spore formation or germination. In his 
general discussion of the group, however, he makes the statement 
