192 



O. P. Dellinger. 



Structure of Cilia Demonstrated hy Teasing. 

 It has long been known that the large cilia of the Hypotrichia 

 (Fig. 6) are composed of many fine fibrils twisted together.^ In a 





'ffsr 



#^?-'' 

 ^^i 



^^^r 



^"^'W, 



^^"^-t '"7 





'r^:^i^m ' ^0'fm;S\!::^ii^ii -'^'"''^'^ 



8 



Fig. 5a. — Spirillum dnnvn from photograph of Plate IV, Fig. 8. 

 Fig. 6. — Stylonychia showing types of cilia. (From Conn.). 

 Fig. 7. — A of Fig. 6 much enlarged. 



Fig. S. — Pseudopod of Actinosphaerium Eich. showing axil filament. (From 

 Calkins' Protozoa, p. SO). 



study of these fonns the author became convinced that all their cilia 

 had a similar structure. Using the same methods which brought out 

 the structure of flagella, the fibrillar nature of these cilia was easily 

 demonstrated. 



