| Fig. | | Page | | NAVICULA | | 1 | Navicula elegans Wm. Sm. | 101 | | 2 | Navicula elegans var. cuspidata Cl. | 101 | | 3-4 | Navicula grevillei (Ag.) Cl. | 99 | | 5 | Navicula libellus Greg. | 99 | | 6-7 | Navicula palpebralis BrÉb. | 101 | | 8 | Navicula rhyncocephala Kuetz. | 97 | | 9 | Navicula cryptocephala Kuetz. | 97 | | 10 | Navicula longa (Greg.) Ralfs. | 97 | | PINNULARIA | | 11 | Pinnularia brÉbissonii (Kuetz.) Cl. | 107 | | 12 | Pinnularia borealis Ehr. | 109 | | 13 | Pinnularia divergens var. elliptica Grun. | 107 | | EPITHEMIA | | 14 | Epithemia turgida (Ehr.) Kuetz. | 111 | | 15-21 | Epithemia argus Kuetz. | 111 | | 16 | Epithemia argus var.? | 111 | | 17 | Epithemia muelleri A. S. | 111 | | 18 | Epithemia zebra var. proboscidea (Kuetz.) Grun. | 112 | | 19 | Epithemia gibberula var. producta Grun. | 112 | | 20 | Epithemia musculus Kuetz. | 112 | | 22 | Epithemia musculus var. constricta (BrÉb.) V. H. | 112 | | RHOPALODIA | | 23 | Rhopalodia gibba (Kuetz.) Mueller | 112 | | 24 | Rhopalodia ventricosa (Kuetz.) Mueller | 113 | | | | Fig. | | Page | | NAVICULA | | 1 | Navicula elegans Wm. Sm. | 101 | | 2 | Navicula elegans var. cuspidata Cl. | 101 | | 3-4 | Navicula grevillei (Ag.) Cl. | 99 | | 5 | Navicula libellus Greg. | 99 | | 6-7 | Navicula palpebralis BrÉb. | 101 | | 8 | Navicula rhyncocephala Kuetz. | 97 | | 9 | Navicula cryptocephala Kuetz. | 97 | | 10 | Navicula longa (Greg.) Ralfs. | 97 | | PINNULARIA | | 11 | Pinnularia brÉbissonii (Kuetz.) Cl. | 107 | | 12 | Pinnularia borealis Ehr. | 109 | | 13 | Pinnularia divergens var. elliptica Grun. | 107 | | EPITHEMIA | | 14 | Epithemia turgida (Ehr.) Kuetz. | 111 | | 15-21 | Epithemia argus Kuetz. | 111 | | 16 | Epithemia argus var.? | 111 | | 17 | Epithemia muelleri A. S. | 111 | | 18 | Epithemia zebra var. proboscidea (Kuetz.) Grun. | 112 |   |
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