78 



Fig. 124. Navicula tripunctata , (5), cells 35-60u long, 6-10u wide; 

 11-12 striae in lOu; central area quadrangular . X 1000. 





valve view 



Notes 



Fig. 125. Navicula viridula , (5), cells 36-80u long, 10-15H wide; 

 10 striae in lOu; central area rounded. X 1000. 



valve view 



Notes : 



Fig. 126. Navicula Zanoni , (6), cells 27-60u long, 7-Hu wide; 

 13-14 striae in lOu; can be confused with _N, 

 cryptocephala . 



valve view 

 X 1000 



ii4 ! .*.51^*' " ** - £■» * ff r f 3 : i i i 





valve view 

 X2000 



Notes : 



