143 
related to physiological starvation or any direct nutritional 
condition; but to some accessory factor. 
Istva nf obtained microconidia by germinating conidia in 
gage orhedre of = chieorse (1 per cent., 5 per cent., 10 per 
nt.). The mycelial development was sparse, but microconidia 
attest preleacte; the sterigmata being bor ne often on highly 
sheer hyphae. The author remarks: ‘‘ In these old cultures 
or three weeks) we have found the best sterigmatous va 
sedation! ” Although Istvan Spree out a very great wiih 
germination experiments with the spores of this fungus using a 
large number of different media, many of an obviously physio 
logically unsuitable nature, only in this particular case 
microsporogeny noted, and it would appear improbable thersfote 
_e i abnormal sporogenous eesaaied was related to the uy 
that in this pabiccaiban 6h case Istvan may have chanced to use 
spores from an old culture when, as has been shown, they would 
normally pcan in the manner > denseted by = ee 
microconidia were borne. In the aette generation of the fungus 
upon bs e bouillon medium the growth ¥ more luxuriant and 
Penaration nde sped it “fol ow the co 
found by the French authors and form microconidia at first and 
later in the same medium gradually change the quality of its 
spore fo Furthermore it has been ‘pointed out that 
probably c. cal, difference in the media which in the first 
three pais ne with the normal controlling factors. 
Among my own cultures premature microsporogeny has oc- 
curred in the duitowing cases, always, however, pat preceded 
by the normal production of Polyactis conidia. strain from 
onion bulb growing on steamed carrot formed sihaebeoaiaich after 
fourteen days; a strain from ntirrhinum on potato ager 
after eleven days, and a similar culture after fourtee 
strain from lettuce ihr on su t root pat 
microsporogeny after thirt n days. In each of these cases the 
culture was vigorous and coacpandal production at first very 
