| Fig. | | Page | | NITZSCHIA | | 1 | Nitzschia longissima (BrÉb.) Ralfs | 123 | | 2 | Nitzschia intermedia Hantzsch | 122 | | 3 | Nitzschia spectabilis var. americana Grun. | 122 | | 4-5 | Nitzschia sigmatella Greg. | 121 | | 6 | Nitzschia scalaris (Ehr.) Wm. Sm. | 119 | | 7 | Nitzschia macilenta Greg. | 120 | | 8 | Nitzschia insignis Greg. | 119 | | 9 | Nitzschia vermicularis (Kuetz.) Hantzsch | 120 | | 10 | Nitzschia longissima forma parva V. H. | 123 | | 11 | Nitzschia reversa Wm. Sm. | 123 | | 12 | Nitzschia acicularis (Kuetz.) Wm. Sm. | 123 | | 13-14 | Nitzschia paxillifer (O. F. Mueller) Heib. | 119 | | HOMŒOCLADIA | | 15 | Homoeocladia filiformis Wm. Sm. | 123 | | | | Fig. | | Page | | NITZSCHIA | | 1 | Nitzschia longissima (BrÉb.) Ralfs | 123 | | 2 | Nitzschia intermedia Hantzsch | 122 | | 3 | Nitzschia spectabilis var. americana Grun. | 122 | | 4-5 | Nitzschia sigmatella Greg. | 121 | | 6 | Nitzschia scalaris (Ehr.) Wm. Sm. | 119 | | 7 | Nitzschia macilenta Greg. | 120 | | 8 | Nitzschia insignis Greg. | 119 | | 9 | Nitzschia vermicularis (Kuetz.) Hantzsch | 120 | | 10 | Nitzschia longissima forma parva V. H. | 123 | | 11 | Nitzschia reversa Wm. Sm. | 123 | | 12 | Nitzschia acicularis (Kuetz.) Wm. Sm. | 123 | | 13-14 | Nitzschia paxillifer (O. F. Mueller) Heib. | 119 | | HOMŒOCLADIA | | 15 | Homoeocladia filiformis Wm. Sm. | 123 | |
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