Essed . — The Panama Disease. II. 
355 
Spores. The reproductive organs may be divided into ascospores — of 
which nothing definite can be said as yet — conidia, and chlamydospores, 
including oidia. The conidia are all more or less sickle-shaped, and may 
be unicellular or compound (2-5 celled). The most frequently occurring are 
the bicellular and the 4-celled conidia, which may be considered typical 
for this fungus. In my first paper the conidia were described as being cut 
off at the apices of short conidiophores, but I found them later and most 
frequently borne on long conidiophores, either unbranched, or branched in 
different ways. The branching is of the racemose type, showing a tendency 
to become verticillate. The single conidiophores are tapering and pointed 
at the tips, often bearing a not fully abstricted conidium. The conidia are 
loosely kept together in heads, consisting only of bicellular or 4-cellular 
conidia, but sometimes also of a mixture of 1-5 celled conidia (see Fig. 2, a). 
As the most specialized type of conidium fructification may be considered 
the Stilboid bodies, which, as described in the first paper, anticipate the 
ascigerous fruit body. In fact, the hyphae remaining after the conidia are 
shed constitute the para-, or rather periphysial sheath, macroscopically 
appearing as orange-red, hair-like outgrowths surrounding the golden yellow 
fruit body with a pink-coloured stroma. All the conidia show a great 
tendency to turn to chlamydospores ; the transformation seems to take 
place mainly under the influence of moisture. In assuming the character 
of chlamydospores the colour becomes dark — some shade of brown— and 
the exosporium very much thickened. The chlamydospores have, as is 
said before, different modes of origin. They may be formed intercalarily as 
in Chlamydomucor or Entyloma ; at the apices of special hyphae as in 
Hypomyces ; out of the myclomyxa resulting from the dissolution of the 
walls of fertile hyphae or out of pegmatia, the resting stage of fertile 
hyphae. The process of chlamydospore-formation in this fungus may be 
looked upon as a specialization of the conditions encountered in the group 
of Hemibasidii : the chlamydospore-fructification anticipated by the slimy 
dissolution of the hyphal walls as in Ustilago ; the chlamydospores formed 
in the course of the hyphae as in Entyloma , the spores enclosed in sporan- 
gium-like bodies as in Sorosporium , Doassansia , Uleiella ; moreover, the 
germination of the chlamydospores in U stilaginoidella alone shows the 
same variations as is found in the Hemibasidii as a group: as in the latter 
we find them in the one case producing promycelia with numerous small 
conidia (sporidia) cut off apically and laterally ; in the other, germi- 
nating vegetatively, which need not be wondered at in the case of Asco- 
mycetes, the chlamydospores of which very often lose their most typical 
character. I may here mention another mode of chlamydospore-formation, 
which was found on liquid nutritive media. The hyphae become chain- or 
oidium-like, with round bodies in the chain or on the apices of side branches. 
These bodies attract a large quantity of protoplasm from adjacent cells, in 
