| Fig. | Page | |
| GOMPHONEIS | ||
| 1 | Gomphoneis mamilla (Ehr.) Cl. | [70] |
| 2 | Gomphoneis herculaneum (Ehr.) Cl. | [70] |
| GOMPHONEMA | ||
| 3 | Gomphonema montanum Schum. | [71] |
| 4 | Gomphonema geminatum Lyng. | [71] |
| 5 | Gomphonema acuminatum var. turris (Ehr.) Cl. | [71] |
| 6-12 | Gomphonema lanceolatum var. insignis (Greg.) Cl. | [71] |
| 7 | Gomphonema acuminatum var. coronata (Ehr.) Cl. | [71] |
| 8 | Gomphonema constrictum Ehr. | [72] |
| 9-10 | Gomphonema sphærophorum Ehr. | [72] |
| 11 | Gomphonema acuminatum var. turris (Ehr.) Cl.? | [71] |
| 13 | Gomphonema ventricosum Greg. | [73] |
| 14 | Gomphonema intricatum Kuetz. | [72] |
| 15 | Gomphonema æquale Greg. | [72] |
| 16 | Gomphonema sarcophagus Greg. | [72] |
| 17 | Gomphonema parvulum var. micropus (Kuetz.) Cl. | [73] |
| 18-19 | Gomphonema angustatum Kuetz. | [72] |
| 20 | Gomphonema acuminatum var. trigonocephala (Ehr.) Cl. | [71] |
| 21 | Gomphonema augur Ehr. | [72] |
| 22 | Gomphonema capitatum Ehr. | [72] |
| 23 | Gomphonema olivaceum Lyng. | [73] |
| 24 | Gomphonema brasiliense var. demeraræ Grun.? | [73] |
| RHOICOSPHENIA | ||
| 25-26-27 | Rhoicosphenia curvata (Kuetz.) Grun. | [56] |
| ||
PLATE 20
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| Fig. | Page | |
| DICTYONEIS | ||
| 1 | Dictyoneis marginata var. maxima n. var. | [79] |
| 2 | Dictyoneis marginata var. commutata Cleve. | [79] |
| 3 | Dictyoneis marginata var. typica Cleve. | [78] |
| DIPLONEIS | ||
| 4 | Diploneis crabro var. pandura (Bréb.) Cl. | [85] |
| 6 | Diploneis campylodiscus (Grun.) Cl. | [86] |
| 7-8 | Diploneis gruendleri (A. S.) Cl. | [85] |
| 9 | Diploneis crabro Ehr. var.? | [85] |
| 10 | Diploneis excentrica n. sp. | [85] |
| 11 | Diploneis fusca var. delicata (A. S.) Cl. | [85] |
| 12 | Diploneis puella (Schum.) Cl. | [85] |
| 13 | Diploneis crabro var. pandurella Cl.? | [85] |
| 14 | Diploneis elliptica (Kuetz.) Cl. | [84] |
| 15 | Diploneis crabro var. expleta (A. S.) Cl. | [85] |
| 16 | Diploneis geminata (Grev.) Cl. | [86] |
| 17 | Diploneis smithii (Bréb.) Cl. | [84] |
| NAVICULA | ||
| 5 | Navicula lyra Ehr. var.? | [93] |
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PLATE 21
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| Fig. | Page | |
| CALONEIS | ||
| 1 | Caloneis permagna (Bail.) Cl. | [82] |
| 2 | Caloneis permagna var. lewisiana n. var. | [82] |
| 3 | Caloneis silicula (Ehr.) Cl. | [81] |
| 4 | Caloneis silicula var. inflata (Grun.) Cl. | [81] |
| 5 | Caloneis brevis var. vexans (Grun.) Cl. | [82] |
| 6-7 | Caloneis wardii Cl. | [82] |
| 8 | Caloneis trinodis (Lewis) | [81] |
| 9 | Caloneis trinodis (Lewis) var.? | [81] |
| 10 | Caloneis powellii (Lewis) Cl. | [83] |
| 18 | Caloneis formosa (Greg.) Cl. | [82] |
| NEIDIUM | ||
| 11 | Neidium affine (Ehr.) Pfitzer | [83] |
| 12 | Neidium affine var. genuina forma minor Cl. | [83] |
| 13 | Neidium affine var. amphirhyncus (Ehr.) Cl. | [83] |
| 14 | Neidium amphigomphus (Ehr.) Pfitzer. | [83] |
| 15 | Neidium hitchcockii (Ehr.) Cl. | [84] |
| 16 | Neidium productum (Wm. Sm.) Cl. | [83] |
| 17 | Neidium iridus (Ehr.) Cl. | [84] |
| ||
