VORTICELLA 



Classification: — Phylum Protozoa, Class Ciliata, Order 

 Peritricha. 



Make out: (1) Shape. Is it constant? (2) Cilia. Distri- 

 bution and functions? Does Vorticella ever swim about? (3) 

 Groove, mouth, and gullet. (4) Ectoplasm and endoplasm. (5) 

 Food vacuoles. (6) Protoplasmic granules. (7) Contractile 

 vacuoles. (8) Macronucleus. (9) Structure of stalk. (10) 

 Reproduction. (11) Make a large drawing, 50 mm. across, show- 

 ing the parts you have seen. With ocular micrometer determine 

 the diameter of the bell. 



JLU L I i « A R Y 33 





45 



