22 VORTICELLA 



Find under the low powei of the microscope. Sketch under the high powen 



i. Enlarged drawing of the expanded body : epistome; peristome; cilia; oral groove; gullet; cuticle] ecto 



plasm; endoplasm; contractile vacuole; food vacuoles; stalk; muscular fibre of stalk. 



' 



^ /t+mA&dAA 



2. Stain with picrocarmme : nucleus. 



3. Feed with Indian ink. Observe the process by which the small particles accumulate at the bottom ot 

 the gullet, pass into the endoplasm, form small round masses which circulate in food vacuoles and are finally 

 cast out into the oral groove through the temporary anus. 



