57 

 Notes on other species of GOMFHONEMA . 



23a Valve faces parallel - CYMBEUA 



Fig. 80. Cymbella af finis , (5), cells 20-70u long, 7-l6n wide; 

 9-12 striae in lOu; ventral median striae ending in an 

 isolated prominent puncta. X 1000. 





valve views 



Notes : 



