F. C. M1LE8 



209 



Hero it is seen thut the granular bodies in the cells have increased 

 both in size and in niunber. In some cases, perhaps under especially 

 favourable conditions, the plants became almost, if not fully, green 

 (see PI. VIII, fig. (i). Preparations from the leaves at this time appear 

 as shown in Fig. 4. Here apparently normal plastids are present, and 

 they resemble very closely those found in ordinary green corn leaves 

 (Fig. 5). Thus in the case of the yellowish-white plants which may 



Fig. 4. Cross section through a leaf ot a still older yellowish-wbite 

 plant which is becoming greenish. Leaf from which the 

 section was taken was almost green, x -llO. 



Fig. .5. Cross section through a leaf of 

 a normal green plant, x 380. 



Jouru. of Oen. iv 



14 



