146 ELECTRON-MICROSCOPIC STRUCTURE OF PROTOZOA 



Plate XV 



Fig. 56. Section through anterior end of Tritrichomonas muris. 

 All four kinetosomes are seen ; that of recurrent flagellum continuous 

 with base of flagellum at right. Parabasal fibril is opaque line 

 attached to uppermost kinetosome; costa is broad, striated band 

 attached to kinetosome of recurrent flagellum. Anterior end of 

 axostyle is seen as row of sectioned tubules curving over kinetosome 

 cluster. Undulating membrane, lower right, consists of expanded 

 flagellar sheath enclosing fibrils and paraflagellar rod. X 60,000. 

 From Anderson and Beams, 1961. 



Fig. 57. Longitudinal section of anterior end of Foaina sp., 

 showing four kinetosomes anterior to dense body identified as 

 centrosome. Part of parabasal body at bottom. X 45,000. From 

 Grasse, 1956b. 



Fig. 58. Section through part of axostyle of Joenia annectens. 

 X 45,000. From Grasse, 1956b. 



