PROTOPLASM THROUGH THE WALLS OF VEGETABLE CELLS. 
859 
Description of Plates. 
PLATE 68. 
Fig. 1. Transverse section of the pulvinus of Trifolium repens which in its principal 
details resembles that of Mimosa pudica. ( X 55.) 
Fig. 2. Longitudinal section of a portion of the pulvinus of Trifolium repens, showing 
the cells immediately beneath the epidermis, (x 105.) 
Fig. 3. Longitudinal section of a portion of the pulvinus of Mimosa pudica, showing 
the cells immediately beneath the epidermis. The intercellular spaces 
are small and badly developed, (x 235.) 
Fig. 4. Cells of the pulvinus of Mimosa pudica which are situated immediately 
around the vascular bundle. The intercellular spaces are large and 
conspicuous. (X 235.) 
Fig. 5. Cells of the pulvinus of Mimosa pudica, situated midway between the 
epidermis and the vascular bundle, after treatment with sulphuric acid, 
staining with methyl violet, and washing with dilute glycerine. The 
protoplasmic contents are shrunken and deeply coloured The remains of 
the middle lamellm can be seen. Certain of the processes appear to join 
uninterruptedly from cell to cell. In others between the two darkly 
stained ends is a lighter stained area uniting the two. The latter is 
believed to be the typical and only true means of continuity. (X 550.) 
Fig. 6. Portions of two bast-cells from the pulvinus of Mimosa pudica after treat¬ 
ment with sulphuric acid, and staining with methyl violet and glycerine. 
(X 1020.) 
Fig. 7. Cells of the pulvinus of Robinia pseudacacia, situated as in Mimosa (fig. 5), 
after treatment with sulphuric acid and staining with methyl violet and 
glycerine. The typical mode of connexion between adjacent cells is 
better seen than in Mimosa. The appearances of an uninterrupted 
continuity are not so frequent, (x 550.) 
Fig. 8. Cells of the pulvinus of Robinia pseudacacia after treatment with sulphuric 
acid and staining with methylene blue. The bottom and sides of the pits 
are stained, (x 105.) 
Fig. 9. Longitudinal section of a portion of the pulvinus of Amicia zygomeris. In 
certain of the cells conspicuous pits are apparent, (x 235.) 
Fig. 10. Cells of the pulvinus of Amicia zygomeris, situated midway between the 
epidermis and the vascular bundle, after treatment with sulphuric acid, 
staining with methyl violet, and mounting in dilute glycerine. Between 
the adjoining masses of the much shrunken protoplasm are numerous fine 
stained processes uniting the two. These in reality represent the stained 
