228 
P. C. VAN DER WOLK, 
when one obtain tliis special variety in one’s pure-cultures. 
One must tliis regard well. 
We see, though the enigma of the round bodies in the mycelium 
of Stagonospora Cassavae being solved, there remains something very 
Strange. 
Still, after all it bas been clearly demonstrated tliat we 
liave to regard tliese puculiar round bodies in the mycelium 
of Stagonospora Cassavae as endospores. 
Some divergences in form and relative grouping together of these 
endospores have been depicted in fig. 4: the drawings so speak for them- 
selves tliat further comment is unnecessary. 
The spores are not constantly spread over the whole mycelium 
thread in a regulär manner; local accumulations may occur by wliich the 
spores attain but very small dimensions: and the whole were in con- 
formity with the forming of s warm spores or the antheridia 
forming by Phycomycetes : see fig. 5. It is interesting tliat we are 
obliged to view these cases in direct 
genetic relation with the somewhat 
rarely occuring accumulation forms 
such as tliose represented in fig. 6, 
the tendency to localise the 
spores in definite reservoirs. 
Fig. 4. Mycelium threads with differently 
grouped endospores. xlOOO. 
Fig. 5. Very marked local accumulation of 
endospores in a mycelium thread. x 1000. 
In tliis figure we are especially interested in 6d aud 6e since they 
exhibit the tendency above indicated to an extreme degree, by br in ging 
tliose reservoirs outside the normal mycelium. The acme of tliis 
tendency is mirrored in fig. 7, wliere we have obtained a habitus form 
wliich is very closely connected with tliose of some of the lower Ascomy¬ 
cetes, such as the Protoascineae, of wliich group a very typical represen- 
tative I have already on a former occasion described in this penodical *). 
Therefore I am inclined concerning this tendency, wliich aims at the 
localization of spores in definite morphological typically reservoirs, to 
regard it as a tendency to Asci-forming. I regard the reservoirs 
as Asci; the spores in question to therefore be true-Ascopores. It is 
well known tliat the genus Stagonospora and indeed the Sphaeropsidales 
in general have different joining-points to the Ascomycetes ; but is inter- 
esting tliat -the Ascomycetes type somewhat diverges from all the various 
species and tliat the Staganospora Cassavae clearly attaches itself to an 
Ascomycetes group wliich may not be freely ascribed to the true Ascomy¬ 
cetes. But it sh ou ld be once more re marked tliat these pecu- 
1) Protascus colorans, tlie cause of yellow grains in rice. Mycol. Centralbl. 
1913, 3, 153. 
