kh 



Fig. 58. Synedra rumpens , (5 ), cells 15-70u long, 2-3n vide; 19-20 

 striae in lOu; central area variable or completely absent. 

 X 1000. 



valve views 



S. rumpens 



var. familiaris 



var. scotica 



»■■■ IffM 



l^H2SSS2E2=a var. fragilarioides 



Notes: 



Fig. 59. Synedra tabulata, ( 5 ), cells 60-150u long, 2-5u wide; 

 striae short, 10-1 1 *- in lOu. May form chains. X 1000. 



valve views 



TTmrnrnnrnmrr 



S. tabula ta 



var. fasciculata 



Notes : 



