PLATE 30 



Fig. 5. Incision through the oral lip severing the membranelle fiber. X 800. 

 ac, anal cirrus; a.c.f., anal cirri fiber; ant.cyt,f. and mb.f., membranelle fiber; 

 c.v., contractile vacuole; f.c, frontal cirri; m.c, marginal cirri; mac, macro- 

 nucleus; m.f.p., membranelle fiber plate; mic, micronucleus; mot., motorium; 

 o.l., oral lip; ph., pharynx. 



Fig. 6. Incision through the cytostomal membraneles, cutting the mem- 

 branelle fiber. X 800. 



Fig. 7. Incision cutting the anal cirri fibers between the ''group of three" 

 and "group of four" frontal cirri. X 800. 



Fig. 8. Incision between the "group of four" frontal cirri and the two 

 ventral cirri, severing the anal cirri fibers. X 800. 



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