The Diatomaceæ of Philadelphia and Vicinity

PLATE 39

Reading edition

Fig. Page 1 Nitzschia spectabilis var. americana Grun. (zone view) 122 2 Nitzschia panduriformis Greg. 117 3 Hantzschia amphioxys (Ehr.) Grun. 113 4 Hantzschia amphioxys var. major Grun. 114 5 Nitzschia dubia Wm. Sm. 118 6 Nitzschia amphioxys Wm. Sm. 114 7 Nitzschia compressa (Bail.) 116 8 Nitzschia compressa var. minor H. L. Smith 116 9 Surirella intermedia Lewis (zone view) 128 10 Surirella arctissima A. S. forma minor 128 11 Surirella ovalis Bréb. 126 12 Surirella biseriata (Ehr.) Bréb. 124 13 Nitzschia sigma (Kuetz.) Wm. Sm. 121 14 Nitzschia obtusa var. flexella H. L. Smith 121 15 Stauroneis legumen Ehr. 89 16 Nitzschia obtusa Wm. Sm. 121

Illustration from The Diatomaceæ of Philadelphia and Vicinity

Fig. Page

1 Nitzschia spectabilis var. americana Grun. (zone view) 122

2 Nitzschia panduriformis Greg. 117

3 Hantzschia amphioxys (Ehr.) Grun. 113

4 Hantzschia amphioxys var. major Grun. 114

5 Nitzschia dubia Wm. Sm. 118

6 Nitzschia amphioxys Wm. Sm. 114

7 Nitzschia compressa (Bail.) 116

8 Nitzschia compressa var. minor H. L. Smith 116

9 Surirella intermedia Lewis (zone view) 128

10 Surirella arctissima A. S. forma minor 128

11 Surirella ovalis Bréb. 126

12 Surirella biseriata (Ehr.) Bréb. 124

13 Nitzschia sigma (Kuetz.) Wm. Sm. 121

14 Nitzschia obtusa var. flexella H. L. Smith 121

15 Stauroneis legumen Ehr. 89

16 Nitzschia obtusa Wm. Sm. 121