ROOT STRUCTURES 



71 



Peranema and Euglena (Roth, 1958a, 1959) are other flagellates 

 whose flagellar structure has been studied with the electron 

 microscope. The basal structure of the uniflagellate forms is but 

 poorly known, although Vickerman has shown that the basal body 

 is complex and may have simple roots. In Peranetna, the basal 

 bodies of the two flagella lie at the inner end of the reservoir and 



Fig. 16. Diagram of the structure of Tritrichomonas ( = Trich' 



otnonas) niuris to show the arrangement of the flagella and 



accessory structures (from Anderson and Beams, 1959). 



AF, anterior flagella; B, blepharoplast ; C, costa; PF, 



parabasal filament; AX, axostyle;- RF, recurrent flagellum; 



ACF, accessory filament; UM, undulating membrane. 



Roth found a bundle of fibrils connecting the two flagellar bases. 

 In the closely similar Euglena, fibrils were found to run from the 

 flagellar bases to connect with the extensive system of sub- 

 pellicular fibrils surrounding the reservoir and lining the body 

 surface. 



