suspension of the muscular motions of the vibrio tritici. 15 
Fig. 20. An infected grain, the plant of which had been 
inoculated with the worms, and the uredo foetida, or smut- 
balls, and both diseases had taken effect ; magnified 10 dia- 
meters. 
Fig. 21. Transverse section of the same; containing in its 
cavity some large worms, many eggs in distinct clusters, and 
the rest filled with uredo foetida, or smut-balls ; magnified 10 
diameters. 
Fig. 22. Two infected grains found in one and the same 
valve of an ear, the seed of which plant had likewise been 
inoculated with both diseases ; one grain, A, is infected with 
the worms and the uredo, and the other with the uredo foetida 
only, see B, therefore a true smut-ball ; each of these grains 
has the two rudiments of the pistils at their summits ; mag- 
nified 10 diameters. 
Fig. 2 3. Transverse section of the same. In the cavity of 
the grain A, are two large worms, and many eggs in two 
distinct clusters, and the rest of the cavity is filled with the 
uredo, and the cavity of the other grain, B, is filled with the 
uredo foetida only; magnified 10 diameters. 
Plate II. 
Fig. 1. A group of worms in water, as seen in the field of 
the microscope. At A, is one of the largest worms in its 
most usual attitude, and in the act of laying its eggs ; at B, 
is one of the smallest old worms ; at C, D, E, F, and G, is 
represented the manner of a young worm extricating itself 
from the egg ; at H, is the empty egg-shell ; at I, is a dead 
worm ; the rest are worms, bending and twisting themselves 
