PLATE 3 
EXPLANATION OF FIGURES 
The ingestion of flexible fibers (Oscillatoria prolifera) 
17 to 20 Method by which a number of coils of an alga filament are rolled up 
inside of a ciliate. 
21 Two frontonias attempting to ingest the same filament. In this particular 
instance the mouths met and the organism on the left slowly ejected the fiber as it 
passed into the mouth of the one on the right. 
22 to 25 The ingested material alters the size, shape, and general appearance 
of the body of the frontonia. 
350 
