

iusMPh^ 



f^- 



C' 



■ oij- . 



Fig. 4. An enlargement of a portion of Fig. 3. The flagellum has hair-like 

 appendages (h) and can thus be regarded as a so-called flimmerflagellum. The hairs 

 have lateral positions (i.e. a line can be drawn through the two inner filaments and 

 through the hairs). Magnification 105 000 x . 



Fig. 5. Transverse section through three sea urchin sperm tails {Psammecliinus 

 miliaris). The detailed morphology of this flagellum has been described in an 

 earlier communication [i]. Magnification 80 500 x . 



Fig. 6. Longitudinal section through the basal parts of two laterofrontal cilia 

 from mussel gill {Myti/iis edidis). The central filaments stop at a transverse basal 

 plate. The peripheral filaments continue (arrow) through this plate and enter the 

 basal body of the cilium. The cell borders are visible at b. Magnification 56 000 x . 



