CILIATA 



105 



_^-ad.mae. 





int.u.me.'^- A-^■--rr-- 



'ptx^r. 



Fig. 89. Stylonichia mytilus, in ventral view, x 200. After various authors. 

 ab.cir. abdominal cirri; ad.mae. adoral membranellae ; An. position of anus 

 (on dorsal side) ; An.cir. anal cirri ; c.vac. contractile vacuole ; c.vac.' accessory- 

 canal of the same ; end.ci. endoral cilia \f.vac. food vacuole ifr.cir. frontal cirri ; 

 gu. gullet; int.u.me. internal undulating membrane; lip, projecting lower lip 

 of peristome ; mar. dr. marginal cirri ; meg. meganucleus ; mi. micronucleus ; 

 pre.ci. preoral cilia; pt.cir. posterior cirri; se.ci. "sensory" cilia of dorsal 

 surface; u.me. preoral undulating membrane (another undulating membrane 

 is present but is omitted, to simplify the figure). 



jX^m^L 



\\ 



Fig. 90. Stylonichia mytilus, from the left side. After Biitschli. 



