404 Ciliophora 



Fig. 7. 43. A. Horizontally elongated telotroch characteristic of Epistylis 

 horizontalis Chatton, x500 (after C). B. Pyxidium cotliurnoides Kent, spec- 

 imen 50;a long; stalk typically unbranched; peristomial disc similar to that 

 in Opcrcularia (after Kahl). C. Rhabdostyla ovum Kent, x850 (after Wang 

 and Nie). D. Asfylozoon pirifonne Schewiakoff, with rudimentary stalk; x560 

 (after Wang and Nie). E. Telotrochidiuyn (Opisthonecta) henneguyi (Faure- 

 Fremiet) Kahl, x450 (after Kofoid and Rosenberg). F. Geleiella vagans 

 Stiller, body enclosed in gelatinous mantle (after S.). G. Hastatella radians 

 Ehrbg., two rings of cytoplasmic "spines"; x740 approx. (after Wang and 

 Nie). H. Epistylis chrysemidis Bishop and Jahn, two zooids; xll5 (after B. 

 S: J.). I. Telotrochidium johanninae Faur^-Fremiet, xl025 (after F-F.). 



growth from the body. The stalk-muscle of colonial Vorticellidae may be 

 continuous throughout the colony (Fig. 7. 48, D), except perhaps in the 

 basal section of the main stalk (200), or the myonemes of individual 

 stalks may be independent (Fig. 7. 48, E). In the former, the colony as a 



