94 The Botanical Gazette. (March, 
no instance have I observed this separating from the cell _ 
body., I did not once observe the creeping movement of the 
swarm-cell described by De Bary and Lister. When this 
movement is begun, the oscillatory movement is said to 
cease, while the cell moves slowly along the glass, with the 
cilium directed forward. 
In the course of its amoeboid movement the cell assumes 
many forms. Sometimes it is nearly straight. Again it will 
be bent double, so that the anterior and posterior ends are 
nearly incontact. At other times protrusions or pseudopodia 
appear in parts of the cell, so that the body assumes almost 
numberless outlines. 
gwartl | 
In these cells § 
into acommon mass, the young plasmodium (plate X, 
The plasmodia are about 24m in diameter, wher si 
spherical swarm-cells are only about 94. Whether the 
