| Fig. | | Page | | ACHNANTHES | | 1-2 | Achnanthes longipes Ag. | 58 | | 3 | Achnanthes brevipes Ag. | 59 | | 4-5-6 | Achnanthes subsessilis Kuetz. | 59 | | 7-8 | Achnanthes inflata (Kuetz.) Grun. | 59 | | 9 | Achnanthes coarctata (BrÉb.) Grun. | 59 | | 10-11-12 | Achnanthes lanceolata (BrÉb.) Grun. | 59 | | 13 | Achnanthes danica (Floegel) Grun. (lower valve) | 60 | | 14-15 | Achnanthes exigua Grun. | 59 | | 16-17 | Achnanthes linearis forma curta H. L. Smith | 59 | | COCCONEIS | | 18 | Cocconeis scutellum var.? | 57 | | 19-20 | Cocconeis placentula Ehr. | 57 | | 21 | Cocconeis scutellum Ehr. (upper valve) | 57 | | 22 | Cocconeis dirupta Greg. (lower valve) | 58 | | 23-24 | Cocconeis pediculus Ehr. | 57 | | 25-26 | Cocconeis pellucida Grun. | 58 | | 27-28 | Cocconeis scutellum var. ornata Grun. | 57 | | 29 | Cocconeis placentula var. lineata (Ehr.) V. H. | 58 | | ANORTHONEIS | | 30-31 | Anorthoneis excentrica (Donk.) Grun. | 56 | | | | Fig. | | Page | | ACHNANTHES | | 1-2 | Achnanthes longipes Ag. | 58 | | 3 | Achnanthes brevipes Ag. | 59 | | 4-5-6 | Achnanthes subsessilis Kuetz. | 59 | | 7-8 | Achnanthes inflata (Kuetz.) Grun. | 59 | | 9 | Achnanthes coarctata (BrÉb.) Grun. | 59 | | 10-11-12 | Achnanthes lanceolata (BrÉb.) Grun. | 59 | | 13 | Achnanthes danica (Floegel) Grun. (lower valve) | 60 | | 14-15 | Achnanthes exigua Grun. | 59 | | 16-17 | Achnanthes linearis forma curta H. L. Smith | 59 | | COCCONEIS | | 18 | Cocconeis scutellum var.? | 57 | | 19-20 | Cocconeis placentula Ehr. | 57 | | 21 | Cocconeis scutellum Ehr. (upper valve) | 57 | | 22 | Cocconeis dirupta Greg. (lower valve) | 58 | | 23-24 | Cocconeis pediculus Ehr. | 57 | | 25-26 | Cocconeis pellucida Grun. | 58 | | 27-28 | Cocconeis scutellum var. ornata Grun. | 57 | | 29 | Cocconeis placentula var. lineata (Ehr.) V. H. | 58 | | ANORTHONEIS | | 30-31 | Anorthoneis excentrica (Donk.) Grun. | 56 | |   |
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