PLATE 26 

 FIG. PAGE 



NAVICULA 



1-2 Navicula cuspidata Kuctz 100 



3 Navicula cuspidata var. ambigua (Ehr.) Cl 100 



4 Navicula spicula (Hickie) Cl 100 



5 Navicula integra Wm. Sm 99 



6 Navicula mutica Kuetz 97 



8 Navicula amerieana Ehr 98 



9 Navicula pupula var. hacillarioides Grun 98 



10 Navicula hacillum Ehr 98 



1 1 Navicula semen Ehr 98 



12 Navicula atomus Nsegeli 100 



13 Navicula minima Grun 98 



14 Navicula ramosissima (Ag.) Cl 95 



15 Navicula crucigera (Wm. Sm.) Cl 100 



16 Navicula viridula var. rostellata Kuetz 95 



17 Navicula radiosa Kuetz 94 



19 Navicula gracilis var. schizonemoides (Ehr.) V. H 95 



20 Navicula peregrina Ehr 94 



21 Navicula cyprinus (Wm. Srn.) 95 



22 Navicula reinhardtii Grun 95 



23 Navicula lanceolate var. arenaria (Donk.) Cl 95 



24 Navicula salinarum Grun 95 



25 Navicula gastrum Ehr 96 



26 Navicula anglica Ilalfs 96 



DIPLONEIS 



7 Diploneis oculata (Breb.) Cl 86 



STAURONEIS 



18 Stauroneis frickei var. angusta n. var 88 



