suspension of the muscular motions of the vibrio tritici. 7 
younger ; but I have not the least doubt, had they been left 
undisturbed in the grain, they would, at the proper period, 
have attained the same size as the others, and would have 
produced eggs. 
This opinion I consider confirmed by my subsequent in- 
vestigations of grains approaching nearer to maturity ; in 
them there was no such striking difference in size ; at that 
period, the old worms in the same grains, which probably 
laid their eggs first, were now in a decaying state ; some 
parent worms were found 'dead, and those still alive were 
laying eggs, and of the same size as those which I had before 
observed in the act of discharging their eggs. I also found 
that the infected germens in the upper part of the ears very 
frequently contained only one single large worm ; notwith- 
standing which, these germens were gradually filling with 
eggs, in the same manner as those in which originally there 
was more than one worm ; and among the diseased germens 
of plants which I had inoculated with the worms and the 
fungi of the smut-balls, both diseases having taken effect, I 
found several germens containing only two or three large 
worms, which formed as many distinct nests within the same 
germen, having each of them a large distinct cluster of eggs, 
kept separate by the fungi of the smut-balls that occupied 
the cavities within those germens. 
From all the observations I had an opportunity of making, 
it appears, that there is no distinction of sex, and that they 
are true hermaphrodites. 
The latter end of July, the diseased grains had almost all 
attained their full size, and assumed a brownish tint ; and 
about the fifth of August they were all of a dark brown co~ 
