THE PLANT-CELL. 



granular body, the nucleus ; and finally, that the protoplasm 

 and the nucleus do not completely occupy the whole cavity 



FIG. 3 (after Hanstein). A. A parenchymatous cell ; at the exterior is the cell- 

 wall (shaded) ; within this is the primordial utricle consisting of two layers, 

 the ectoplasm (left clear) and the endoplasm which is granular and contains 

 chlorophyll-corpuscles ; the endoplasmic layer is connected by means of 

 bridles which traverse the vacuole, with a central mass of endoplasm in which 

 the nucleus, containing a nucleolus, is embedded. The arrows indicate the 

 direction of currents in the protoplasm. B. A portion of the cell-wall and 

 primordial utricle more highly magnified : T, 2, the common cell- wall of two 

 adjacent cells ; 3, the hyaline ectoplasmic layer ; 4, the granular endoplasmic 

 layer, containing chlorophyll-corpuscles, of the primordial utricle. 



of the cell, but that there is a large space, the vacuole, which 

 is filled with watery fluid, the cell-sap. Let us now study each 

 of these parts in detail. 



