474 



BIOLOGY OF THE PROTOZOA 



_e.tr? 







Fig. 193 



Fig. 194 



Fig. 193.— Paramecium caudatum. Section of a dividing individual, est. con- 

 necting strand of dividing micronuclei; e.tr., extruded trichocysts; g.v., gastric vacuole- 

 M, dividing macronucleus; m, m, divided micronuclei; tr., trichocysts. (Original ) 



Fig. 194.— Dileptus anser, with beaded macronucleus and 'twisted proboscis 

 (Original.) 



