464 
MR. H. SANDON ON PROTOZOA FROM THE 
and these ai'e consequently seen vibrating vigorously a short distance in 
front of the animal itself. The progression is rapid and in a straight line 
without any tendency on the part of the organism to turn on its axis. It 
follows that the movement of the flagellum (which is too rapid to be 
Fig. 1. 
Fig. 2. 
Phalansteriwn solitarium, x 2500. 
1. Normal living form with collar. 
2. Elonaated form from an old culture. 
visible) must consist of a lasliing from side to side, and is not the typical 
spiral movement of the (Jraspedomonads. The contractile vacuole is not 
usually visible, but is situated just behind the centre of the body. 
