The Diatomaceæ of Philadelphia and Vicinity

PLATE 33

Reading edition

Fig. Page NITZSCHIA 1 Nitzschia longissima (Bréb.) Ralfs 123 2 Nitzschia intermedia Hantzsch 122 3 Nitzschia spectabilis var. americana Grun. 122 4-5 Nitzschia sigmatella Greg. 121 6 Nitzschia scalaris (Ehr.) Wm. Sm. 119 7 Nitzschia macilenta Greg. 120 8 Nitzschia insignis Greg. 119 9 Nitzschia vermicularis (Kuetz.) Hantzsch 120 10 Nitzschia longissima forma parva V. H. 123 11 Nitzschia reversa Wm. Sm. 123 12 Nitzschia acicularis (Kuetz.) Wm. Sm. 123 13-14 Nitzschia paxillifer (O. F. Mueller) Heib. 119 HOMŒOCLADIA 15 Homœocladia filiformis Wm. Sm. 123

Illustration from The Diatomaceæ of Philadelphia and Vicinity

Fig. Page

NITZSCHIA

1 Nitzschia longissima (Bréb.) Ralfs 123

2 Nitzschia intermedia Hantzsch 122

3 Nitzschia spectabilis var. americana Grun. 122

4-5 Nitzschia sigmatella Greg. 121

6 Nitzschia scalaris (Ehr.) Wm. Sm. 119

7 Nitzschia macilenta Greg. 120

8 Nitzschia insignis Greg. 119

9 Nitzschia vermicularis (Kuetz.) Hantzsch 120

10 Nitzschia longissima forma parva V. H. 123

11 Nitzschia reversa Wm. Sm. 123

12 Nitzschia acicularis (Kuetz.) Wm. Sm. 123

13-14 Nitzschia paxillifer (O. F. Mueller) Heib. 119

HOMŒOCLADIA

15 Homœocladia filiformis Wm. Sm. 123