Fig. 25. — Votticella. 



A, living specimen fully expanded, showing stalk {st) with axial fibre 

 (ajT./), peristome (per), disc (rf), mouth (mih), gullet {gull), and 

 contractile vacuole [c. vac). 



B, the same, bent on its stalk and with the disc turned away from the 

 observer. 



c, optical section of the same, showing cuticle (cu), cortex {cort), 

 medulla {med), nucleus (««), gullet (gull), several food- vacuoles, and 

 anus (an), as well as the structures shown in A. 



d\ a half-retracted and D- a fully-retracted specimen, showing the 

 coiling of the stalk and overlapping of the disc by the peristome. 



