| Fig. | | Page | | SYNEDRA—Continued | | 1 | Synedra oxyrhynchus var. undulata Grun. | 48 | | 2 | Synedra pulchella var. flexella n. var. | 49 | | 3 | Synedra affinis Kuetz. | 50 | | 4 | Synedra affinis var. tabulata (Ag.) V. H. | 50 | | 5-6 | Synedra vaucheriÆ var. parvula (Kuetz.) Rab. | 49 | | 7 | Synedra affinis var. parva (Kuetz.) V. H. | 50 | | 8 | Synedra radians (Kuetz.) H. L. S. | 49 | | DIMEROGRAMMA | | 9-10 | Dimerogramma marinum (Greg.) | 46 | | 11 | Dimerogramma surirella (Ehr.) Grun. | 46 | | 12-13-14 | Dimerogramma minus (Greg.) Ralfs. | 47 | | TRACHYSPHENIA | | 15 | Trachysphenia australis Petit. | 47 | | ACTINELLA | | 16-17-18 | Actinella punctata Lewis. | 54 | | ASTERIONELLA | | 19-20-21 | Asterionella formosa Hass. | 50 | | 22 | Asterionella inflata Heib. | 50 | | EUNOTIA | | 23 | Eunotia hemicyclus (Ehr.) Ralfs | 53 | | 24-25 | Eunotia lunaris (Ehr.) Grun. | 53 | | | | Fig. | | Page | | SYNEDRA—Continued | | 1 | Synedra oxyrhynchus var. undulata Grun. | 48 | | 2 | Synedra pulchella var. flexella n. var. | 49 | | 3 | Synedra affinis Kuetz. | 50 | | 4 | Synedra affinis var. tabulata (Ag.) V. H. | 50 | | 5-6 | Synedra vaucheriÆ var. parvula (Kuetz.) Rab. | 49 | | 7 | Synedra affinis var. parva (Kuetz.) V. H. | 50 | | 8 | Synedra radians (Kuetz.) H. L. S. | 49 | | DIMEROGRAMMA | | 9-10 | Dimerogramma marinum (Greg.) | 46 | | 11 | Dimerogramma surirella (Ehr.) Grun. | 46 | | 12-13-14 | Dimerogramma minus (Greg.) Ralfs. | 47 | | TRACHYSPHENIA | | 15 | Trachysphenia australis Petit. | 47 | | ACTINELLA | | 16-17-18 | Actinella punctata Lewis. | 54 | | ASTERIONELLA | | 19-20-21 | Asterionella formosa Hass. | 50 | | 22 | Asterionella inflata Heib. | 50 | | EUNOTIA | | 23 | Eunotia hemicyclus (Ehr.) Ralfs | 53 | | 24-25 | Eunotia lunaris (Ehr.) Grun. | 53 | |
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