"Vorticella. 1. Structure. N., Macronucleus; n., micronucleus; c.v., contractile vacuole; m., mouth; f.v., food vacuole; v., vestibule. 2. Encysted individual. 3. Division. 4. Separation of a free-swimming unit--the result of a division. 5. Formation of eight minute units (mg.). 6. Conjugation of microzooid (mg.) with one normal size." -Thomson, 1916

Vorticella

"Vorticella. 1. Structure. N., Macronucleus; n., micronucleus; c.v., contractile vacuole; m., mouth;…