135 
Geminella* aud Sclerotiniat and are known in certain other fungi. 
When large clusters of sterigmata occur in close proximity they 
produce the G ladocephalo-merizosporica and Cristularia 
forms of Farneti. Not infrequently the rejuvenescent cells 
germinate into adjacent cells and give rise arge numbers 
: sai : fi 
a single chain along the lumen, simulating the appearance of 
endoconidia (PI. v. fig. 8). In all cases, however, microsporogeny 
takes place by a process of acropetal segmentation from a spe- 
cialised sterigma and never by fragmentation} or budding. 
or by following the actual development in any single case. 
septum is formed, separating the spore from the sterigma (PI. v. 
fig. 11 g). ‘This septum splits along its middle lamella liberating — 
neck (Pl. v. fig. 11). The swelling increases, is separated as be- 
fore by a septum which splits in the plane of the middle lamella 
freeing the second snore (Pl. v. fig. h, a, b, c, d, e). is 
process is continued so that ultimately a long chain or cluster of 
spores is formed on each sterigma, the new spores pushing ee 
¥ 
ceedingly thin pellicle, and contain 
than one, central and highly refractive granule of an amorphous 
he recent figures of 
Gilbert, A. H., and Bennett, C. W.: Phytopathology vii. 1917. 
i i ial mentation may occur, but the 
tterly different from the microconidia. 
stat direct response to a Ss sion : 
oidia eck, ea al Be germinate under favourable conditions giving rise 
to the normal vegetative mycelium, and their pr Hebei 
method of tiding the fungus over a suddenly arising ad E 
mentation hae been recorded by Berlese (Malphighia 1889), Farneti and 
Istvanfii. . 
