10 



COMPA RA TIVE ANA TOMY 



CHAP. 





FIG. 14. Stylonychia mytilus, after Stein FIG. 15. Stentor Roeselii, after Stein 



(from Claus's Zoology), seen from the ventral (Claus's Zoology). 0, Oral opening with oeso^ 



surface. Ws, Adoral ciliated zone ; C, contractile phagus ; PV, contractile vacuole N, nucleus, 

 vacuole ; A T , nucleus ; N', rnicronucleus ; A , anus. 



FIG. 16. Vorticella microstoma, after Stein (from Claus's Text-book of Zoology), a, Dividing 

 longitudinally ; N, nucleus ; 6, after complete division one part severs itself after having formed 

 a ring of cilia behind ; w, oral ciliary organ ; c, vorticellas in conjugation ; A', the adhering bud-like 

 individuals. 



