The Diatomaceæ of Philadelphia and Vicinity

PLATE 25

Reading edition

Fig. Page NAVICULA 1 Navicula tumida (Bréb.) Cl. 99 2 Navicula brasiliensis var. bicuneata Cl. forma constricta. 92 3 Navicula delawarensis Grun. 92 4-6 Navicula pusilla Wm. Sm. 91 5 Navicula humerosa Bréb. 91 7 Navicula spectabilis var. emarginata Cl. 94 8 Navicula pusilla var. subcapitata n. var. 91 9 Navicula punctulata Wm. Sm. 92 10 Navicula lyra Ehr. 93 11 Navicula hennedyi var. manca A. S. 93 12 Navicula hennedyi Wm. Sm. 93 13 Navicula lyra var. dilatata A. S. 93 14 Navicula yarrensis Grun. 101 15 Navicula yarrensis Grun. (smaller form) 101 16 Navicula yarrensis Grun. var.? 101

Illustration from The Diatomaceæ of Philadelphia and Vicinity

Fig. Page

NAVICULA

1 Navicula tumida (Bréb.) Cl. 99

2 Navicula brasiliensis var. bicuneata Cl. forma constricta. 92

3 Navicula delawarensis Grun. 92

4-6 Navicula pusilla Wm. Sm. 91

5 Navicula humerosa Bréb. 91

7 Navicula spectabilis var. emarginata Cl. 94

8 Navicula pusilla var. subcapitata n. var. 91

9 Navicula punctulata Wm. Sm. 92

10 Navicula lyra Ehr. 93

11 Navicula hennedyi var. manca A. S. 93

12 Navicula hennedyi Wm. Sm. 93

13 Navicula lyra var. dilatata A. S. 93

14 Navicula yarrensis Grun. 101

15 Navicula yarrensis Grun. (smaller form) 101

16 Navicula yarrensis Grun. var.? 101