The Diatomaceæ of Philadelphia and Vicinity

by Charles S. Boyer

Fig. Page ACHNANTHES 1-2 Achnanthes longipes Ag. [58] 3 Achnanthes brevipes Ag. [59] 4-5-6 Achnanthes subsessilis Kuetz. [59] 7-8 Achnanthes inflata (Kuetz.) Grun. [59] 9 Achnanthes coarctata (Bréb.) Grun. [59] 10-11-12 Achnanthes lanceolata (Bréb.) Grun. [59] 13 Achnanthes danica (Floegel) Grun. (lower valve) [60] 14-15 Achnanthes exigua Grun. [59] 16-17 Achnanthes linearis forma curta H. L. Smith [59] COCCONEIS 18 Cocconeis scutellum var.? [57] 19-20 Cocconeis placentula Ehr. [57] 21 Cocconeis scutellum Ehr. (upper valve) [57] 22 Cocconeis dirupta Greg. (lower valve) [58] 23-24 Cocconeis pediculus Ehr. [57] 25-26 Cocconeis pellucida Grun. [58] 27-28 Cocconeis scutellum var. ornata Grun. [57] 29 Cocconeis placentula var. lineata (Ehr.) V. H. [58] ANORTHONEIS 30-31 Anorthoneis excentrica (Donk.) Grun. [56]

Fig.		Page
ACHNANTHES
1-2	Achnanthes longipes Ag.	[58]
3	Achnanthes brevipes Ag.	[59]
4-5-6	Achnanthes subsessilis Kuetz.	[59]
7-8	Achnanthes inflata (Kuetz.) Grun.	[59]
9	Achnanthes coarctata (Bréb.) Grun.	[59]
10-11-12	Achnanthes lanceolata (Bréb.) Grun.	[59]
13	Achnanthes danica (Floegel) Grun. (lower valve)	[60]
14-15	Achnanthes exigua Grun.	[59]
16-17	Achnanthes linearis forma curta H. L. Smith	[59]
COCCONEIS
18	Cocconeis scutellum var.?	[57]
19-20	Cocconeis placentula Ehr.	[57]
21	Cocconeis scutellum Ehr. (upper valve)	[57]
22	Cocconeis dirupta Greg. (lower valve)	[58]
23-24	Cocconeis pediculus Ehr.	[57]
25-26	Cocconeis pellucida Grun.	[58]
27-28	Cocconeis scutellum var. ornata Grun.	[57]
29	Cocconeis placentula var. lineata (Ehr.) V. H.	[58]
ANORTHONEIS
30-31	Anorthoneis excentrica (Donk.) Grun.	[56]

PLATE 17

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]

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]

PLATE 18

Fig. Page CYMBELLA 1 Cymbella aspera (Ehr.) Cl. [61] 2 Cymbella cymbiformis (Kuetz.) Bréb. [62] 3 Cymbella cistula (Hempr.) Kirchn. [62] 4 Cymbella lanceolata (Ehr.) Kirchn. [62] 5 Cymbella mexicana (Ehr.) A. S. [62] 6 Cymbella naviculiformis Auerswald. [60] 7 Cymbella tumida (Bréb.) V. H. [62] 8 Cymbella philadelphica n. sp. [63] 9 Cymbella ehrenbergii Kuetz. [60] 10 Cymbella heteropleura (Ehr.) Kuetz. [60] 11 Cymbella rhomboidea n. sp. [63] 12 Cymbella turgida (Greg.) Cl. var.? [63] 13 Cymbella sinuata Greg. [61] 14 Cymbella ventricosa Kuetz. [62] 15-19 Cymbella excisa (Kuetz.) De Toni. [61] 16 Cymbella amphicephala Nægeli. [61] 17 Cymbella cuspidata Kuetz. [60] 18 Cymbella affinis Kuetz. [61] 20 Cymbella gracilis (Rab.) Cl. [64] 21 Cymbella prostrata (Berk.) Cl. [63] 22 Cymbella ventricosa Kuetz.? [62] 23 Cymbella turgida (Greg.) Cl. [63] 24 Cymbella triangulum (Ehr.) Cl. [63] 25 Cymbella lacustris (Ag.) Cl. [64]

Fig.		Page
CYMBELLA
1	Cymbella aspera (Ehr.) Cl.	[61]
2	Cymbella cymbiformis (Kuetz.) Bréb.	[62]
3	Cymbella cistula (Hempr.) Kirchn.	[62]
4	Cymbella lanceolata (Ehr.) Kirchn.	[62]
5	Cymbella mexicana (Ehr.) A. S.	[62]
6	Cymbella naviculiformis Auerswald.	[60]
7	Cymbella tumida (Bréb.) V. H.	[62]
8	Cymbella philadelphica n. sp.	[63]
9	Cymbella ehrenbergii Kuetz.	[60]
10	Cymbella heteropleura (Ehr.) Kuetz.	[60]
11	Cymbella rhomboidea n. sp.	[63]
12	Cymbella turgida (Greg.) Cl. var.?	[63]
13	Cymbella sinuata Greg.	[61]
14	Cymbella ventricosa Kuetz.	[62]
15-19	Cymbella excisa (Kuetz.) De Toni.	[61]
16	Cymbella amphicephala Nægeli.	[61]
17	Cymbella cuspidata Kuetz.	[60]
18	Cymbella affinis Kuetz.	[61]
20	Cymbella gracilis (Rab.) Cl.	[64]
21	Cymbella prostrata (Berk.) Cl.	[63]
22	Cymbella ventricosa Kuetz.?	[62]
23	Cymbella turgida (Greg.) Cl.	[63]
24	Cymbella triangulum (Ehr.) Cl.	[63]
25	Cymbella lacustris (Ag.) Cl.	[64]

PLATE 19

Fig. Page GOMPHONEIS 1 Gomphoneis mamilla (Ehr.) Cl. [70] 2 Gomphoneis herculaneum (Ehr.) Cl. [70] GOMPHONEMA 3 Gomphonema montanum Schum. [71] 4 Gomphonema geminatum Lyng. [71] 5 Gomphonema acuminatum var. turris (Ehr.) Cl. [71] 6-12 Gomphonema lanceolatum var. insignis (Greg.) Cl. [71] 7 Gomphonema acuminatum var. coronata (Ehr.) Cl. [71] 8 Gomphonema constrictum Ehr. [72] 9-10 Gomphonema sphærophorum Ehr. [72] 11 Gomphonema acuminatum var. turris (Ehr.) Cl.? [71] 13 Gomphonema ventricosum Greg. [73] 14 Gomphonema intricatum Kuetz. [72] 15 Gomphonema æquale Greg. [72] 16 Gomphonema sarcophagus Greg. [72] 17 Gomphonema parvulum var. micropus (Kuetz.) Cl. [73] 18-19 Gomphonema angustatum Kuetz. [72] 20 Gomphonema acuminatum var. trigonocephala (Ehr.) Cl. [71] 21 Gomphonema augur Ehr. [72] 22 Gomphonema capitatum Ehr. [72] 23 Gomphonema olivaceum Lyng. [73] 24 Gomphonema brasiliense var. demeraræ Grun.? [73] RHOICOSPHENIA 25-26-27 Rhoicosphenia curvata (Kuetz.) Grun. [56]