PLATE IV. 



Fig. 1. — Oral cilia of Steutor. 



Fig. 2. — Section of stentor at the point of attachment of the oral cilia 

 showing their attachment to the body. 



Fig. 3 and 4. — Teased myonemes of steutor showing their fibrillar nature. 



Fig. 5.— Myonomes of Stentor. 



Fig. 6. — Contractile stalk of Vorticella. Photographed by Dr. C. F. Hodge 

 with Ultraviolet microscope. 



Fig. 7. — Ultraviolet microphotograph of striped muscle. Photographed by 

 Dr. C. F. Hodge. 



