The Diatomaceæ of Philadelphia and Vicinity

PLATE 7

Reading edition

Fig. Page BIDDULPHIA 1-2-3-4 Biddulphia biddulphiana (Smith) 31 5 Biddulphia rhombus (Ehr.) Wm. Sm. 32 6 Biddulphia granulata Roper 32 7 Biddulphia turgida (Ehr.) Wm. Sm. 32 8 Biddulphia smithii (Ralfs) V. H. 32 9 Biddulphia lævis Ehr. 33 10 Biddulphia lævis Ehr. Sporangial frustules (260 diam.) 33 EUNOTOGRAMMA 11 Eunotogramma læve Grun. 33

Illustration from The Diatomaceæ of Philadelphia and Vicinity

Fig. Page

BIDDULPHIA

1-2-3-4 Biddulphia biddulphiana (Smith) 31

5 Biddulphia rhombus (Ehr.) Wm. Sm. 32

6 Biddulphia granulata Roper 32

7 Biddulphia turgida (Ehr.) Wm. Sm. 32

8 Biddulphia smithii (Ralfs) V. H. 32

9 Biddulphia lævis Ehr. 33

10 Biddulphia lævis Ehr. Sporangial frustules (260 diam.) 33

EUNOTOGRAMMA

11 Eunotogramma læve Grun. 33