| Fig. | | Page |
| PINNULARIA—Continued |
| 1 | Pinnularia gentilis (Donk.) Cl. | [103] |
| 2 | Pinnularia viridis Nitzsch. | [104] |
| 3 | Pinnularia dactylus var. dariana (A. S.) Cl. | [103] |
| 4 | Pinnularia viridis var. fallax Cl. | [104] |
| 5 | Pinnularia socialis Palmer | [104] |
| 6 | Pinnularia æstuarii Cl. | [105] |
| 7 | Pinnularia rectangulata (Greg.) Cl. | [110] |
| 8 | Pinnularia trigonocephala Cl. | [103] |
| 9 | Pinnularia major (Kuetz.) Wm. Sm. (small form near P. viridis) | [102] |
| 10 | Pinnularia dactylus var. demeraræ Cl. | [103] |
| 11 | Pinnularia mormonorum (Grun.) | [107] |
| 12 | Pinnularia brébissonii (Kuetz.) Cl. | [107] |
| 13 | Pinnularia mesolepta Ehr. | [105] |
| 14 | Pinnularia termes var. stauroneiformis V. H. | [106] |
| 15 | Pinnularia molaris (Grun.) Cl. | [105] |
| 16 | Pinnularia braunii Grun. | [106] |
| 17 | Pinnularia termes (Ehr.) A. S. | [106] |
| 18 | Pinnularia appendiculata (Ag.) Cl. | [106] |
| 19 | Pinnularia microstauron (Ehr.) Cl. var.? | [106] |
| 20 | Pinnularia subcapitata Greg. | [105] |
