and other Mycetozoa. 285 
From these, and many other experiments, it appears that 
sporangia of Chondrioderma dijforme form from ten to 
fourteen days after the spores are sown with cress-seeds. 
The most rapid development I have met with was in an 
experiment with green unripe seeds of Plant ago lanceolata 
which had been steeped in water for several hours ; seven 
of these seeds were placed on wet tissue-paper in a watch- 
glass with spores from cultivation A : on the ninth day 
a sporangium was formed, and near it a branching yellow 
plasmodium showed active streaming movement ; many more 
sporangia developed during the next few days T . 
I have tried other seeds with mucilaginous testae without 
obtaining sporangia, though no doubt there must be some as 
favourable to their growth as the above. 
Cienkowski’s experiment, in which plasmodia appeared four 
days after sowing the spores, and sporangia on the following 
day 1 2 3 , would seem to be an exceptional experience. 
The following observations relate to further details of 
development. Spores from two small sporangia from the 
cultivation A, each containing capillitium in fair abundance 
of the type of Fig. 3, were sown with seven cress-seeds on a 
ring of blotting-paper in a watch-glass. In eighteen days, 10 
sporangia had ripened on the cress and on the paper. The plas- 
modium was of the same yellow colour as in the former gene- 
ration, but the sporangia showed a marked difference in the 
capillitium. Some were repetitions of the parents in all respects ; 
others contained only a few threads, and these varied in colour 
and thickness, and one, though equalling the parents in size, had 
no capillitium whatever. The spores, as a rule, were well deve- 
loped and only varied in size from 10 /x to 14 /x ; but in some 
sporangia many were abnormal, measuring from 20 /x to 40 *x, 
others were still larger and of irregular form ; but this variation 
in the size of the spores always occurs, in every species I have 
cultivated, when grown under unfavourable conditions. 
1 I need hardly say that as good results are obtained when ripe plantain-seeds 
are used. 
3 De Bary, Fungi, Mycetozoa, etc., Eng. ed. p. 433. 
