| Fig. | | Page | | NAVICULA | | 1-2 | Navicula cuspidata Kuetz. | 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 americana Ehr. | 98 | | 9 | Navicula pupula var. bacillarioides Grun. | 98 | | 10 | Navicula bacillum Ehr. | 98 | | 11 | Navicula semen Ehr. | 98 | | 12 | Navicula atomus NÆgeli. | 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. Sm.) | 95 | | 22 | Navicula reinhardtii Grun. | 95 | | 23 | Navicula lanceolata var. arenaria (Donk.) Cl. | 95 | | 24 | Navicula salinarum Grun. | 95 | | 25 | Navicula gastrum Ehr. | 96 | | 26 | Navicula anglica Ralfs. | 96 | | DIPLONEIS | | 7 | Diploneis oculata (BrÉb.) Cl. | 86 | | STAURONEIS | | 18 | Stauroneis frickei var. angusta n. var. | 88 | | | | Fig. | | Page | | NAVICULA | | 1-2 | Navicula cuspidata Kuetz. | 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 americana Ehr. | 98 | | 9 | Navicula pupula var. bacillarioides Grun. | 98 | | 10 | Navicula bacillum Ehr. | 98 | | 11 | Navicula semen Ehr. | 98 | | 12 | Navicula atomus NÆgeli. | 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. | |   |
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