PLATE 34 



Figs. 13-19 are successive longitudinal sections, 10^ thick, through the same 

 organism. ^ 365. 



Fig. 13. Through left side, showing peripheral fibers of oral ivhorl. 



Fig. 14. Showing fibers of oral whorl and also of aboral whorl. 



Fig. 1.5. Showing fibers of both oral and aboral whorls and section of 

 macronucleus. 



Fig. 16. Fibers of both oral and aboral and margin of eytostome. 



Fig. 17. Through the eytostome and cytopharynx, showing fibers of aboral 

 whorl and a few fibers of oral whorl. 



Fig. 18. Section through right side of macronucleus. 



Fig. 19. Through right side of animal. Fibers of both whorls in periphery. 



Fig. 20. Whole mount of dividing organism, showing macronucleus, the 

 constriction, and in each daughter organism a new eytostome, cytopharynx, 

 and cytopharyngeal fibers. Malloiy's triple connective tissue stain. X 356. 



[360] 



