M O R P H O G E N E S I S O F F R E S H - W A T E R P L A N A R I A
307
FIG. 1. Neoblasts of Dugesia luguhris. The planarian is not in a period of regeneration.
Methyl green-pyronine stain. C: cytoplasm; N : nucleus; n: nucleolus.
2000
4000
6000
8000
FIG. 2. Distribution curve of the neoblasts of Dugesia luguhris. Abscissa: length of
the planarian in μ; ordinate: number of neoblasts on a surface of 14,400 μ
2 .