270 GOLDSTEIN: PLANTS AFFECTED WITH Mosaic DISEASE 
of small bodies about the size of a nucleole. The third, the 
vacuolate bodies, are no doubt the same as those I find in living 
and fixed preparations. 
The bodies shown in my plate, figure 2, resemble very 
closely those figured by Kunkel for corn mosaic and drawn from 
stained and sectioned material, Plate 5, Fig. J. Kunkel de- 
scribes the intracellular bodies found in mosaic diseased corn 
tissue as varying in size and form. In their reticulate or granular 
structure, and the presence of vacuoles, these bodies agree with 
those I find. The bodies are further described as showing no 
indication of a membrane, though the author adds that a mem- 
brane must be present since when the bodies come in contact 
with one another they do not fuse. Kunkel observed that the 
bodies in living material were often moved by the vigorous 
streaming of the protoplasm but never seemed to move inde- 
pendently or change their shape. 
The intracellular bodies figured by Lyon in preparations of 
sugar cane affected with the Fiji disease, are strikingly similar 
to those I find. They have the same finely granular content 
and general appearance of the X bodies I am figuring. They 
are described as small spherical or oval plasma bodies. The 
larger bodies may be oblong so as to accommodate themselves 
to the shape of the cell. Occasionally they may appear lobed 
or distorted. His drawings were made from fresh material 
stained with various aniline dyes. 
McKinney and his co-workers have described intracellular 
bodies in living and fixed material associated with the rosette 
disease and a mosaic-like leaf mottling of wheat. These bodies 
show considerable resemblance in form, size, and distribution 
to those described by other investigators cf mosaic diseases. 
Matz describes the presence of a granular plasmodium-like 
substance in cells of sugar cane tissue affected with the yellow 
stripe disease. Such yellow granular material may perhaps be a 
decomposition product. That the granules exhibit Brownian 
movement is further proof of such a disorganization in the cells 
since the contents of dying cells usually show the presence of 
granules exhibiting such movements. 
It is possible that the disease may be transmitted ‘over a 
limited area by the natural division of growing cells resulting 
in the formation of daughter cells each containing some of the 
