PLATE 2 
Photomicrographs of longitudinal sections of tomato-stem galls eight days after 
inoculation. 
A. —A longitudinal section through the cortex of a gall similar to that shown in 
Plate i, D. The puncture entered the stem at an elevation corresponding to a, but at a 
different level from this section. The invaded intercellular spaces (b) are surrounded 
by hyperplastic cells (c). X 59. 
B. —A longitudinal section tnrough the pith of a gall similar to that shown in Plate 1, 
B. The puncture was made at a. An invaded intercellular space may be seen (b) 
about which a few hyperplastic cells may be observed (c). X59- 
In both A and B it appears that the hyperplastic cells form a more or less cylin¬ 
drical sheath about the invaded intercellular space which gives the appearance of a 
strand of tissue. 
The preparations photomicrographed in this plate were made in a manner similar 
to those of Plate 1. 
