53 



19a Raphe rudimentary, short, near poles only - EUNOTIA . 



Fig. 72. Eunotia pectinalis , ( 5 ), cells 40-lifOu long, 5-10u wide; 

 arcuate in valve view, rectangular in girdle view; 7-12 

 striae in lOu. X 1000. Common in soft waters. 



valve views 



E. pectinalis 



var. ventral is 



var. undulata 



var. minor 



var. minor 

 form impressa 



Notes: 



girdle view 

 E. pectinalis 



