277 
Seedlings of Zea Mais and Phoenix dactylifera . 
cytoplasm. On the contrary I think there is evidence that the nucleo- 
proteids leave the nucleus in a fluid condition ; because the nuclei at this 
stage have a swollen and distorted appearance (Fig. 6 ). In a few cases 
a vacuole surrounds the nucleus. A nucleolus is present in nearly every case. 
Apparently some of the contents of the subepidermal cells are used 
in the formation of diastase, because those cells in the vicinity of the 
epidermal layer are showing more signs of depletion than any others ; 
in fact those in the vicinity of the young plant show little sign of depletion. 
The content of starch has increased over any previous stage. 
Morphology of the cells at the end of the fifth day of activity. At this 
time there is a still greater depletion of the granular substance in the 
cytoplasm of the epidermal cells, which causes it to appear lighter coloured 
in all instances. The greatest scarcity of granules is at the proximal end 
of the cells. The nuclei are large and contain a large amount of chromatin 
in the form of spherical masses at the surface of the nucleus. They show 
a difference from the last stage in being found no longer in the proximal 
half of the cell, but in the distal half, a short distance above the centre. 
The nucleolus has diminished in size until it is no longer visible. Apparently 
there is some relation existing between nucleolus and chromatin, because 
as one increases the other decreases. Some later experiments give more 
light on this subject. The same condition was found in Drosera by 
Rosenberg (’99), although there were numerous exceptions. 
The morphology of the cells on the ninth day of activity (Fig. 7 ). The 
condition of the cells in the epidermis is quite similar to that described 
in the last stage, except it is very evident that increasingly greater quan- 
tities of proteid grains are disappearing. The nuclei are quite similar 
to those last described, both in appearance and position. The proteid 
granules which remain are most abundant in the distal end of the cell. 
The morphology of the cells after thirteen days of activity (Fig. 8 ). The 
endosperm of the seeds from which this material was taken was nearly 
exhausted. The cytoplasm of the scutellar epidermal cells is compact and 
fills nearly the entire cell-cavity. It contains a small number of flocculent 
granules of a different sort from those appearing in the cells when enzymes 
are being actively secreted. The nuclei are situated near the centre of the 
cell. The nucleo-plasm stains but slightly different from the cytoplasm, 
making it difficult to determine the exact boundary between the two. 
Large nucleoli and a small amount of chromatin are the only substances 
which can be distinguished in the nuclei. 
This condition of affairs suggests that the cells have ceased their 
active metabolism and are at this time in a passive state, and that perhaps 
even at this time a few have been partly absorbed by the growing plant. 
From this time on there is probably very little enzyme produced. 
Taking a general survey of the morphological changes, we see that 
