PROTOPLASMIC MOVEMENTS 



21 



continually swept up and down in the ever moving mass 

 (Fig. 9). 



FIG. 9. Two cells and a part of a third from a stone wort (Nitella) showing 

 rotation in the direction of the arrows. m> Membrane of the cell; n, nucleus. 

 B and C, cells from the stamen hairs of the spiderwort (Tradescantia) showing 

 circulation of protoplasm as indicated by the arrows. (From Sedgwick and 

 Wilson.) 



Another type of flowing movement may be seen in the stamen 

 hairs of the spiderwort (Tradescantia) which consist of single 

 rows of cells. Not only is there a flowing of granules and proto- 



