PLATE 5 
EXPLANATION OF FIGURES 
10 Camera-lucida drawing of plug cells from the cicatrix of a worm killed 
two days after section of the nerve. Stained with iron haematoxylin and orange 
Ge XS £700: 
11 Detail of the nerve cord of a regenerated worm; time, four days. This 
shows the position of ganglion cells and the characteristic varicosities on the 
fibers. Iron haematoxylin and orange G. X 170. 
12 A portion of the body wall was removed, 0.5 mm. wide and three meta- 
meres long, in order to watch regeneration in the muscle layers and epithelium. 
Worm killed after ten hours’ regeneration, showing the size and character of the 
plug cells and the epithelial growth. X 480. 
13. Same as figure 14. Worm killed after one day and six hours’ regeneration. 
14 Cicatrix region after one day and twenty-one hours’ regeneration. This 
worm had only a simple cut in the body wall. X 480. 
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