Fig. 1. 10. Parabasal apparatus in different flagellates. A. Tetramitus bu- 

 fonis; x2200 (after Duboscq and Grasse). B. Pseudodevescovitia imiflagellata; 

 xllOO (after Kirby). C. Single mastigont of Snyderelln lahogae (see Fig. 

 1. 8, C): diagrammatic (after Kirby). D. Stephaiwnyinfyha nehimbitim. dia- 

 grammatic optical section showing karyomastigonts; x750 (after Kirby). E. 

 Karyomastigont of 5. nelumbium; xI870 approx. (after Kirby). F. Hyper- 

 devescovina torquata; xl050 (after Kirby). G. Macrotriclionionas ramosa; 

 xl360 (after Kirby). H. Bodo caudatus; x3600 (after HoUande). I. Leptomonas 

 ctenocephali; diagrammatic (after A. and M. Lwoff). }. Trypanosoma brucei, 

 kinetoplast seen on edge; protargol; diagrammatic (after Kirby). K. T. brucei, 

 surface view of kinetoplast (after Kirby). L. Codosiga elegans, a choanoflagel- 

 late; diagiammatic (after de Saedeleer). M. Choanocyte of a sponge, Clathrina 

 coriacea; diagrammatic (after Volkonsky). N. Chilomonas Paramecium; x2850 

 (after Hollande). O. Polytoma uvella; diagrammatic (after Volkonsky). P. 

 Cercobodo heimi; x3450 approx. (after Hollande). Key: a, axostyle; ab, apical 

 body; b, blepharoplast; co, collar; cr, cresta; f, parabasal filament; k, kineto- 

 plast; Aw, karyomastigont; n, nucleus; p, parabasal apparatus; pn, para- 

 nuclear body; r, periflagellar ring; rh, rhizoplast. 



