PLATE 20

Fig.Page
DICTYONEIS
1Dictyoneis marginata var. maxima n. var.[79]
2Dictyoneis marginata var. commutata Cleve.[79]
3Dictyoneis marginata var. typica Cleve.[78]
DIPLONEIS
4Diploneis crabro var. pandura (Bréb.) Cl.[85]
6Diploneis campylodiscus (Grun.) Cl.[86]
7-8Diploneis gruendleri (A. S.) Cl.[85]
9Diploneis crabro Ehr. var.?[85]
10Diploneis excentrica n. sp.[85]
11Diploneis fusca var. delicata (A. S.) Cl.[85]
12Diploneis puella (Schum.) Cl.[85]
13Diploneis crabro var. pandurella Cl.?[85]
14Diploneis elliptica (Kuetz.) Cl.[84]
15Diploneis crabro var. expleta (A. S.) Cl.[85]
16Diploneis geminata (Grev.) Cl.[86]
17Diploneis smithii (Bréb.) Cl.[84]
NAVICULA
5Navicula lyra Ehr. var.?[93]

Fig.Page
DICTYONEIS
1Dictyoneis marginata var. maxima n. var.[79]
2Dictyoneis marginata var. commutata Cleve.[79]
3Dictyoneis marginata var. typica Cleve.[78]
DIPLONEIS
4Diploneis crabro var. pandura (Bréb.) Cl.[85]
6Diploneis campylodiscus (Grun.) Cl.[86]
7-8Diploneis gruendleri (A. S.) Cl.[85]
9Diploneis crabro Ehr. var.?[85]
10Diploneis excentrica n. sp.[85]
11Diploneis fusca var. delicata (A. S.) Cl.[85]
12Diploneis puella (Schum.) Cl.[85]
13Diploneis crabro var. pandurella Cl.?[85]
14Diploneis elliptica (Kuetz.) Cl.[84]
15Diploneis crabro var. expleta (A. S.) Cl.[85]
16Diploneis geminata (Grev.) Cl.[86]
17Diploneis smithii (Bréb.) Cl.[84]
NAVICULA
5Navicula lyra Ehr. var.?[93]