LIST OF PLATES 



Frontispiece 

 Pl. I 



Pl. II 

 Pl. Ill 

 Pl. IV 



Pl. V 

 Pl. VI 

 Pl. VII 

 Pl. VIII 

 Pl. IX 

 Pl. X 

 Pl. XI 

 Pl. XII 

 Pl. XIII 

 Pl. XIV 

 Pl. XV 

 Pl. XVI 

 Pl. XVII 



Pl. XVIII 



Metachronal waves of membranelles of Stentor polymorphus 



Transverse sections of flagella and basal bodies of Pseudo- 

 trichonympha (E.M.). 



Sections of cilia and basal bodies of Anodonta (E.M.). 

 Sections of flagella of hypermastigine flagellates (E.M.). 

 Sections of basal parts of the membranelles of Euplotes 



(E.M.). 

 Sections of compound cilia (Euplotes and Mnemiopsis) (E.M.). 

 Sections of sensory cilia (E.M.). 



Modifications of shaft structure of flagella and cilia (E.M.). 

 Flagella of some phytoflagellates (E.M.). 

 Flagella and haptonemata from algae (E.M.). 

 Sections of sperm tails of invertebrates (E.M,). 

 Transverse sections of sperm tails (E.M.). 

 Sections of some centrioles and basal bodies (E.M.). 

 Basal bodies and root structures of some protozoa (E.M.) 

 Striated roots of metazoan cilia (E.M.). 



The movement of spermatozoa of the sea urchin and bull. 

 The movement of two polyflagellate protozoa. 



The movement of two types of cilia from Mytilus gill 



filaments. 

 Metachronal waves and ciliary beating of Opalina, 



Xll 



