EXPLANATION OF PLATES 



PLATE 29 



Fig. 1. Transverse incision through three-fourths of the body, after which 

 the animal maintained normal form. X 800. a.c, anal cirrus; a.c.f., anal cirri 

 fiber; ant. cyt. f., and mb. f., membranelle fiber; c.v., contractile vacuole; cyt., 

 eytostome; f.c, frontal cirri; m.c, marginal cirri; mac, macronucleus; m.f.p., 

 membranelle fiber plate; mic, micronucleus; mot., motorium; o.h, oral lip; ph., 

 pharynx. 



Fig. 2. Transection between "group of three" and "group of four" frontal 

 cirri. Dorsal view. X 800. 



Fig. 3. Transection between "group of four" frontal cirri and the two 

 ventral cirri. X 800. 



Fig. 4. Transection between the two ventral cirri and five anal cirri. 



[462] 





