394 Ciliophora 



Fig. 7. 36. A-E. Arrangement of membranelles in Ophryoscolecidae, polar 

 views: A. Entodinium; B. Opisthotrichum; C. Diplodinium and Epidiniiim; 

 D. Opiiryoscolex; E. Caloscolex; diagrammatic (after Dogiel). F-L. Variations 

 in the number and arrangement of skeletal plates in Ophryoscolecidae; dia- 

 grammatic cross-sections near the anterior pole (after Dogiel). M. Eudiplo- 

 dinium maggii (Fiorentini) Dogiel, x250 (after Kofoid and Christenson). N. 

 Eodiniuni polygonale Kofoid and MacLennan, x600 (after M. & MacL.). O. 

 Ophryoscolex caudalus Eberlein, x250 (after MacLennan). P. Entodinium 

 biconcavum Kofoid and MacLennan; a, anus; b, boundary layer between 

 ectoplasm and endoplasm; c, contractile vacuole; e, endoplasm; o, oesoph- 

 agus; r, rectum; v, ventral lobe; schematic, xlOOO (after K. & MacL.). Q. 

 Epidiniuni caudatum (Fiorentini) Crawley, xlOO (after Kofoid and Mac- 

 Lennan). R. Longitudinal section of Diplodinium medium showing adoral 

 ciliation and cilia extending into the oesophagus; x225 (after Rees). 



