The Diatomaceæ of Philadelphia and Vicinity

PLATE 17

Reading edition

Fig. Page FRUSTULIA 1 Frustulia lewisiana (Grev.) De Toni 77 2 Frustulia rhomboides (Ehr.) De Toni 77 3 Frustulia rhomboides var. amphipleuroides Grun. 77 4 Frustulia vulgaris (Thwaites) De Toni 77 5 Frustulia interposita (Lewis) De Toni 78 6 Frustulia rhomboides var. saxonica (Rab.) De Toni 77 BREBISSONIA 7 Brébissonia bœckii (Kuetz.) Grun. 79 8 Brébissonia palmerii n. sp. 80 AMPHIPLEURA 9 Amphipleura pellucida Kuetz. 78 10-11 Amphipleura rutilans (Trentepohl) Cl. 78 ANOMŒONEIS 12 Anomœoneis serians (Bréb.) Cl. 80 13 Anomœoneis serians forma minor 80 14 Anomœoneis follis (Ehr.) Cl. 80 TRACHYNEIS 15 Trachyneis aspera var. intermedia Grun. 70 MASTOGLOIA 16 Mastogloia kinsmanii Lewis 87 17 Mastogloia angulata Lewis 87 18 Mastogloia lanceolata Thwaites 87 19 Mastogloia smithii Thwaites 87 20 Mastogloia elegans Lewis 87 21-22-23 Mastogloia apiculata Wm. Sm. 87 24 Mastogloia exigua Lewis 87

Illustration from The Diatomaceæ of Philadelphia and Vicinity

Fig. Page

FRUSTULIA

1 Frustulia lewisiana (Grev.) De Toni 77

2 Frustulia rhomboides (Ehr.) De Toni 77

3 Frustulia rhomboides var. amphipleuroides Grun. 77

4 Frustulia vulgaris (Thwaites) De Toni 77

5 Frustulia interposita (Lewis) De Toni 78

6 Frustulia rhomboides var. saxonica (Rab.) De Toni 77

BREBISSONIA

7 Brébissonia bœckii (Kuetz.) Grun. 79

8 Brébissonia palmerii n. sp. 80

AMPHIPLEURA

9 Amphipleura pellucida Kuetz. 78

10-11 Amphipleura rutilans (Trentepohl) Cl. 78

ANOMŒONEIS

12 Anomœoneis serians (Bréb.) Cl. 80

13 Anomœoneis serians forma minor 80

14 Anomœoneis follis (Ehr.) Cl. 80

TRACHYNEIS

15 Trachyneis aspera var. intermedia Grun. 70

MASTOGLOIA

16 Mastogloia kinsmanii Lewis 87

17 Mastogloia angulata Lewis 87

18 Mastogloia lanceolata Thwaites 87

19 Mastogloia smithii Thwaites 87

20 Mastogloia elegans Lewis 87

21-22-23 Mastogloia apiculata Wm. Sm. 87

24 Mastogloia exigua Lewis 87