DESCRIPTION OF PLATES. 

 Plates I, II, III, and IV are photographs taken with Spencer Lens 1.5 mm. 

 objective and No. 3 eyepiece. 



PLATE I. 

 Fig. 1 to 13 Cilia of Stylonychia. 

 Fig. 1 and 2.— Cilia killed with 2 per cent, cosmic acid. 

 Fig. 3. — Cilia killed with Strong Flemming. 

 Fig. 4. — Cilia killed with Eabl's fluid. 

 Fig. 5. — Cilia killed with Absolute alcohol. 

 Fig. 6. — Cilia killed with Tellyesniczky's fluid. 

 Fig. 7. — Cilia killed with Zenlier's fluid. 

 Figs. S and 9. — Cilia killed with Acetic acid. 

 Fig. 10. — Cilia killed with Chromic acid. 

 Fig. 11. — Cilia killed with Chromo-acetic acid. 

 Fig. 12. — Cilia killed with Picric acid. 

 Fig. 13.— Cilia killed with Formol. 



