39 



Fig. 45. Fragilaria brevistriata , ( 5 ), cells 12-28u long, 3-5u vide; 

 striae short, 13-17 in 10|i. 



valve 

 view 

 var. trigibba 



X 600 



valve 



view 



var. inflata 



X 600 



girdle 

 view 



A 



V 



valve 

 view 



X 1000 



Notes : 



Fig. k6. Fragilaria capucina, ( 3 ), cells 25-100u long, 2-5u wide; 

 striae delicate, about 15 in lOu; clear central area. 

 X 1000. Abundant in northern waters. 



flrnmin'II.IL.illlllllinillllllU Illlll.lllllilllllllllllWnmmm, 



Vj ^™ ji " ' I'iiiii'i " iiniiiii 'inii(iHiiiiii'iiini' l '"- J 



valve view 



valve view 

 var. mesolepta 



girdle view 



Notes : 



