The Diatomaceæ of Philadelphia and Vicinity

PLATE 20

Reading edition

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

Illustration from The Diatomaceæ of Philadelphia and Vicinity

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