The Mastigophora 181 



Fig. 4. 43. A. Retortomunas gryllotalpae (Grassi) Stiles, ventral view 

 showing peristomial fibril, two flagella, nucleus (in outline); x2000 (after 

 Wenrich). B. Chilonwstix intestiiialis Kuczynski, ventral view showing peri- 

 stomial fibril, four flagella, food vacuole, nucleus (in outline): x2000 (after 

 Wenrich). C. Macrumastix lapsa Stokes, x2250 (after Lemmermann). D, E. 

 Costia necatrix (Henneguy) Leclerq; ventral view showing groove and bases 

 of flagella; lateral view; x3750 (after Tavolga and Nigrelli). F. Coprnmastix 

 prowazeki Aragao, showing groove (at left), nucleus and rhi/ostyle; xI444 

 (after A.). G. Retortomonas gryllotalpae, lateral view (after Wenrich). H. 

 Relortomonas agilis Mackinnon, x2880 (after Ludwig). I, J. Chilomastix 

 magna Becker, showing nucleus, peristomial fibril, and intracytoplasmic 

 band but not the cytostomal flagellum (I), x2160; protargol technique, show- 

 ing peristomial fibril and flagella (J), x2850 (after Kirby and Honigberg). 

 K. Tetrarnitus rostratus Perty, showing groove, rhizostyle, nucleus; x2250 

 (after Hollande). L. Tetrarnitus salinus (Entz) Kirby, showing groove, ante- 

 rior nucleus, and food vacuole developing at base of gullet; x2320 (after K.). 

 M. Streblomastix strix Kofoid and Swezy, showing flagella and long slender 

 nucleus; xHOO (after K. & S.). 



