| 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 | Homœocladia filiformis Wm. Sm. | [123] |
