12 MORPHOGENESIS IN CILIATES 



Once the detorsion is achieved, the ciliate has a bipolar 

 set of nine rows plus the rows a, b and x, y, z. It will now 

 undergo a series of repeated divisions: this is palintomy. 



Fig. 3. Gymnodinloides inkystans. (a) The trophont. (b) The to- 

 mite (p. 13). The trophont's volume may be 2 to 64 times that of 

 the tomite. c.a., "cadre anastomotique": a characteristic fiber of many 

 apostomatous cihates, always located between kineties 2 and 3; r., 

 rosette or month organ; ch.f., falciform field (thigmotactic) ; ch.og., 

 ogival field (also thigmotactic); g.i., infraciliary grannie (kinetosome); 

 tc, trichocystosome ; t., trichocyst. 



