352 Ciliophora 



much beyond the posterior end of the cytostome (Fig. 7. 10, E-G). In any 

 case, the oral ridge and its extension, if present, may be armed with 

 trichites or trichocysts. In Legendrea, the posterior part of the body bears 

 a number of tentacles, each equipped with trichocysts (Fig. 7. 11, D). 

 UnUke the usual condition, the cytostome in Teiitoplirys lies at the base 

 of three proboscis-like extensions of the body (Fig. 7. 10, I, J). Although 

 the somatic ciliation is usually complete and uniform, except where in- 

 terrupted by the oral ridge or its extension, a row of flattened "cilia" 

 (slender membranelles?) extends along each side of the cytostome in 

 Spathidioides. In addition, a more or less complete loss of cilia on the 



Fig. 7. 11. A. Enchelydiuiii ampliora Kahl, 30-45/^ (after K.). B, C. Pen- 

 ardiella undulata Kahl, 90-1 30/i, ventral and lateral views of spiral ridge and 

 other features (after K.). D. Legendrea loyczae Faur^-Fremiet, showing 

 tentacles, macronucleus, pharyngeal fibrils (from Kahl, after F-F.). E. Trach- 

 elius ovum Ehrbg., 200-400/x; cytostome, circumpharyngeal trichites, macro- 

 nucleus, contractile vacuoles (after Kahl). F. Dilrptus anser (O.F.M.), 

 250-600^ but usually 250-400yLt (after Kahl). G. Paradileptus conicus Wenrich, 

 cytostome, circumpharyngeal trichites, zone of trichocysts, macronuclear 

 chain, nuinerous contractile vacuoles; x250 (after W.). 



