56 



Fi «* T 8 - Gomphonema olivaceum , (12), cells 10-40u long, 5-10u wide; 

 10-14 striae in lOu; no isolated punctae in the central 

 area. X 1000. Widely distributed. 



valve views 



girdle view 



Notes 



Fig. 79- Gomphonema parvulum , (5), cells 8-30u long, 4-7u wide; 

 1^-16 striae in 10m; one isolated puncta in the central 

 area. X 1000. 



valve views 



Notes 



var. var. 

 subelllptlca micropus 



