192 The Mastigophora 









Fig. 4. 50. A. Staurojoenina assimilis Kirby. showing four flagellar groups, 

 rhizoplast bands extending anteriorly from the nucleus, and the major body 

 filaments extending posteriorly; cuticular striations indicated at lateral mar- 

 gins; X330 (after K.). B. Optical section, anterior end of S. assimilis, showing 

 four flagellar groups; X330 (after Kirby). C. Barbitlanympha ufalula Cleve- 

 land; two anterior flagellar gioups. nucleus surrounded by parabasal bodies; 

 axostylar filaments extend posteriorly; x20o (after C). D. Uiinyinpha talca 

 Cleveland; two flagellar groups, nucleus suspended by nuclear sleeve; axo- 

 stylar filaments extending posteriorly; X3r,o (after C). E, F. Hoplonympha 

 natator Light; surface view showing two flagellar tufts and spiral pellicular 

 grooves (E); optical section showing nucleus suspended by rhizoplast bands 

 (enclosed in granular column); a delicate endoplasmic thread (primitive 

 axostyle?) extends posteriorly; X855 (after L.). 



Family 1. Hoplonymphidne. The flagella arise in tAvo anterior groups. 

 One group passes to each daughter organism in fission. Hoplonympha is 

 represented in termites; three other genera, in the wood roach (Crypto- 

 cercus). 



