Ciliophora 409 



Six genera have been referred to the family: Ballodora Dogiel and Furssenko (106), 

 Epistylis Ehrenberg (106; Fig. 7. 43, A, H), Opercularia Stein (106; Fig. 7. 44, J), 

 Pyxidium Kent (106; Fig. 7. 43, B), Rhabdostyla Kent (106; Fig. 7. 43, C) and Telo- 

 trochidiiim Kent (63, 122, 180; Fig. 7. 43, E. I). Since no stalked stage is known for 

 Telotrochidium, the status of this genus as a member of the family is uncertain. 



Family 3. Lagenophryidae. These are loricate ciliates in which the 

 peristomial disc lies at the tip of a stout neck which is usually the only 

 part of the body to be extended through the mouth of the lorica. 



The family contains only the genus Lagenophrys Stein (2, 106; Fig. 7. 44, D, E). 



Fig. 7. 47. A-F. Vorticella microstoma Ehrbg.: extended form (A), con- 

 tracted specimen (B), and telotroch (C), x540; development of a telotroch 

 from a stalked stage (D-F), x360 (after Noland and Finley). G. Vorticella 

 mayeri Faure-Fremiet, x575 approx. (after Wang and Nie). H. The peri- 

 stomial area in Vorticella: ac, basal granules of adoral ciliature; cv, con- 

 tractile vacuole with its adjacent reservoir; r', vestibule; vm, adoral membrane 

 in vestibule; diagrammatic (after Noland and Finley). I. Vorticella picta 

 Ehrbg.. x5I0 (after Noland and Finley). 



