Plate VI. 



EPITHEMIA. ( Rupestrij J 



VORTICELLA. 



Hyaline texture 



Greenish Hue 



A li'w forms of Polycystina asut l)i.-it.oinra; 

 from various df.plhx 



10 



I JJi-rUaLiiia. 

 \Siibarcuaia.. 



13 



W.C. fecit 



Malby 4- Sons, l.ith 



