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HANDBOOK OF PROTOZOOLOGY 



Stentor roeseli Ehrenberg, Standing fresh water among de- 

 caying vegetation. Body colorless ; when extended, reaches over 

 1 mm. The posterior end often in a tubular envelope. 



Stentor polymorphus (Miiller) (Fig. 161, i). Among fresh- 

 water plants. Extended body measures 1.25 mm. 



Fig. 161 a. Bursaria truncatella. X50 (After Calkins), 



b, c. Balanlidium coli. X400. c, a cyst. 



d. Balantidiopsis duodeni. X 125 (After Stein). 



e. Condylostoma patens. X 135 (After Calkins). 



f. C.vorticella. X 160 (After Butschli). 



g. Stentor igneus. XI 15 (After Stein), 

 h. S. pyriformis. XI 15 (After Johnson), 

 i. S. polymorphus. X 50 (After Stein). 



