CILIATA 



103 



Fig. 87. Ciliata from the rectum of the frog. From Borradaile. A,Balantidium 

 entozoon, x 65. B, Nyctotherus cordiformis, x 130. an. anus; c.v. contractile 

 vacuole; meg. meganucleus; mi. micronucleus ; v. vestibule. 



Fig. 88. Ciliata. After various authors. A, Prorodon teres, x 500. B, Spiro- 

 stomum ambiguum, x 150. C, Stentor coeruleus, x 50. ad.w. adoral wreath; 

 c.vac. contractile vacuole; c.vac' accessory vacuole; c.vac." accessory canal; 

 f.vac. food vacuole; ecp. ectoplasm; M. mouth; meg. meganucleus; mi. micro- 

 nucleus ; per. peristome ; rods in protoplasm around gullet. 



