Fig. 13k. 



85 



Rhopalodia gibba , (12), cells 35-300u long, 6-30u wide; 

 6-ti costae in lOu; 12-16 punctate rows in lOu. 



Notes : 



girdle view 

 X 1200 



valve view 

 X 750 



section of valve 

 X 2000 



Fig. 135. Rhopalodia gibberula , (5), cells 25-80u long, 12-kOji 

 wide; 3-4 ventral costae in lOu, lk-1? punctate rows 

 in lOu. X 1000. 



valve view 

 var. van Heurckii 

 Notes : 



girdle view 



