456 
Fig. 9. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Messrs Gardiner and Hill, The Histology 
the middle lamella as at y, until only a few islands z of 
the original wall remain. The parts of the wall under- 
going solution become swollen. They are indicated by 
shading. Cell contents R. are seen in some cells. Mag. 
460. 
A cell wall from the peripheral part of the endosperm of a 
seed in an advanced stage of germination. The ferment 
here attacks the younger layers of the cell wall and 
gradually works inwards. Mag. 460. 
As fig. 9. The action of the ferment along the course of 
separate threads is more clearly seen. Mag. 750. 
Figures 11 — 20, Galium Tricorne. 
A young seedling with the cotyledons still embedded in the 
endosperm. The seed has been cut in half to shew its 
hollow nature and the position of the cotyledons (c.). 
A transverse section of the endosperm of a recently ger- 
minated seed. The section has been treated with safranin, 
which stains the unaltered cell walls (w.) but leaves 
unstained the walls (m.) of the cells surrounding the 
cotyledonary cleft (c.c.), which have been altered by 
ferment action. 
A section of the endosperm of a germinated seed, shewing 
the centripetal action of the ferment on the cell walls. 
The attacked portions of the wall are shaded. T. testa. 
The ferment appears to attack the walls with but little 
relation to the numerous ‘connecting threads’ ( ct .) for it 
does not usually work along the threads, but the cell wall 
in process of dissolution shews a crenulated edge where 
the ferment action is taking place. Mag. 350. 
A section of the endosperm of a seed in an advanced stage of 
germination, stained with Congo red to shew the effect of 
the ferment action on the composition of the cell wall. 
The dye stains the attacked portions of the wall (m.) 
(shaded in the figure) and leaves the original wall ( w .) 
unstained. The centripetal action of the ferment and its 
method of attacking the cell wall are well seen. s. a piece 
of a wall in surface view. T. testa. Mag. 180. 
