The Diatomaceæ of Philadelphia and Vicinity

PLATE 26

Reading edition

Fig. Page NAVICULA 1-2 Navicula cuspidata Kuetz. 100 3 Navicula cuspidata var. ambigua (Ehr.) Cl. 100 4 Navicula spicula (Hickie) Cl. 100 5 Navicula integra Wm. Sm. 99 6 Navicula mutica Kuetz. 97 8 Navicula americana Ehr. 98 9 Navicula pupula var. bacillarioides Grun. 98 10 Navicula bacillum Ehr. 98 11 Navicula semen Ehr. 98 12 Navicula atomus Nægeli. 100 13 Navicula minima Grun. 98 14 Navicula ramosissima (Ag.) Cl. 95 15 Navicula crucigera (Wm. Sm.) Cl. 100 16 Navicula viridula var. rostellata Kuetz. 95 17 Navicula radiosa Kuetz. 94 19 Navicula gracilis var. schizonemoides (Ehr.) V. H. 95 20 Navicula peregrina Ehr. 94 21 Navicula cyprinus (Wm. Sm.) 95 22 Navicula reinhardtii Grun. 95 23 Navicula lanceolata var. arenaria (Donk.) Cl. 95 24 Navicula salinarum Grun. 95 25 Navicula gastrum Ehr. 96 26 Navicula anglica Ralfs. 96 DIPLONEIS 7 Diploneis oculata (Bréb.) Cl. 86 STAURONEIS 18 Stauroneis frickei var. angusta n. var. 88

Illustration from The Diatomaceæ of Philadelphia and Vicinity

Fig. Page

NAVICULA

1-2 Navicula cuspidata Kuetz. 100

3 Navicula cuspidata var. ambigua (Ehr.) Cl. 100

4 Navicula spicula (Hickie) Cl. 100

5 Navicula integra Wm. Sm. 99

6 Navicula mutica Kuetz. 97

8 Navicula americana Ehr. 98

9 Navicula pupula var. bacillarioides Grun. 98

10 Navicula bacillum Ehr. 98

11 Navicula semen Ehr. 98

12 Navicula atomus Nægeli. 100

13 Navicula minima Grun. 98

14 Navicula ramosissima (Ag.) Cl. 95

15 Navicula crucigera (Wm. Sm.) Cl. 100

16 Navicula viridula var. rostellata Kuetz. 95

17 Navicula radiosa Kuetz. 94

19 Navicula gracilis var. schizonemoides (Ehr.) V. H. 95

20 Navicula peregrina Ehr. 94

21 Navicula cyprinus (Wm. Sm.) 95

22 Navicula reinhardtii Grun. 95

23 Navicula lanceolata var. arenaria (Donk.) Cl. 95

24 Navicula salinarum Grun. 95

25 Navicula gastrum Ehr. 96

26 Navicula anglica Ralfs. 96

DIPLONEIS

7 Diploneis oculata (Bréb.) Cl. 86

STAURONEIS

18 Stauroneis frickei var. angusta n. var. 88