= 13 
spherical buds. “These buds undergo basal constriction and be- 
come more or less.distinctly obovoid in appearance. The buds, 
which are destined’to become the conidia, do not extend into the | 
concavities of the lobe-system or into the interlobal areas of the 
secondary branch-hyphe. They remain thickly aggregated upon 
the convexities. They develop more rapidly upon the lateral 
ternary lobes, and more slowly upon the terminal ternary lobes. 
Likewise the development is, as a whole, more rapid upon the 
lateral secondary branch-hyphe than upon the terminal. These 
facts are strictly in accord with the acropetal development of the 
whole conidia-bearer. 
Each conidial area, at first simply regose from the crowded 
projections on its surface, gradually becomes clothed with the 
oborate buds which grow and become abstricted’ into fusiform or 
somewhat acutely ovate conidia, 6-7—2%-3% jy in diameter. 
In a single conidia-bearer one may see all the gradations in the 
branch whorls, from the mere projecting warts towards the apex 
to the ternary or quaternary lobed branches near the base. In 
all cases examined the basal third of the central filament does not 
become clothed with primary branch-hyphe, but remains un- 
branched, septate, thick-walled, as a supporting trunk. : 
Examination of mature conidial-branches shows an increase 
in the size of the vacuoles until in the branch which has 
completed the abstriction of its conidia we find only traces of 
_ protoplasm in the hyphz and lobes, the greater portion being 
occupied by the enlarged coalescent vacuoles. 
No septe have been observed in any part of the conidia-bearer 
except in the central filament. Here, too, they are principally con- 
fined to infraconidial areas, and occur very rarely between successive 
whorls of primary branch-hyphe. This fact, taken in connec- 
tion with the great enlargement of vacuoles in mature conidial- 
branches, may be considered as a physiological adaptation by 
which the transfusion of protoplasmic substances into the distally 
situated conidia is always easily brought about, there being no 
membranes in the way to compel dialysis. 
The whole plant is hyaline or whitish, and would seem to be 
quite certainly in the genus Acrostalagmus, Corda, although the 
mucilage layer surrounding the conidia—distinguished by Ber- 
