The Diatomaceæ of Philadelphia and Vicinity

by Charles S. Boyer

Fig.		Page
LICMOPHORA
1-2	Licmophora flabellata (Carm.) Ag.	[39]
3-4	Licmophora lyngbyei Kuetz.	[40]
5	Licmophora ehrenbergii (Kuetz.) Grun.	[40]
6-7	Licmophora paradoxa (Lyng.) Ag.	[39]
8-9	Licmophora ovulum Mer.	[39]
10	Licmophora baileyi (Edw.) Grun.	[40]
11	Licmophora gracilis (Ehr.) Grun.	[39]
12-13	Licmophora gracilis var. elongata (Kuetz.) De Toni	[39]
14-15	Licmophora tincta (Ag.) Grun.	[40]

PLATE 10

Fig. Page MERIDION 1-2-3 Meridion circulare (Grev.) Ag. [40] DIATOMA 4 Diatoma vulgare var. grande (Wm. Sm.) Grun. [42] 5-6 Diatoma anceps (Ehr.) Kirchn. [42] 7-8 Diatoma hiemale (Lyng.) Heib. [42] 9-10 Diatoma vulgare Bory. [42] PLAGIOGRAMMA 11 Plagiogramma tessellatum Grev. [43] 12 Plagiogramma obesum Grev. [43] 13 Plagiogramma pygmæum Grev. [43] 14 Plagiogramma wallichianum Grev. [43] EUNOTOGRAMMA 15 Eunotogramma læve Grun. [33] OPEPHORA 16-19 Opephora schwartzii (Grun.) Petit. [43] 17 Opephora pinnata var. lanceolata n. var. [44] 18 Opephora pacifica (Grun.) Petit. [43] FRAGILARIA 20-21 Fragilaria virescens Ralfs. [44] 22-23 Fragilaria arctica Grun. [44] 24-25-27-28-29 Fragilaria undata Wm. Sm. [44] 26 Fragilaria undata Wm. Sm., var.? [44] 30 Fragilaria construens (Ehr.) Grun. [45] 31 Fragilaria harrisonii (Wm. Sm.) Grun. [45] 34 Fragilaria capucina var. mesolepta Rab. [45] 35 Fragilaria parasitica (Wm. Sm.) [45] 36 Fragilaria sp. ? [45] 37 Fragilaria linearis Cstr. [45] RHAPHONEIS 38 Rhaphoneis amphiceros Ehr. [46] 39-40 Rhaphoneis amphiceros var. rhombica Grun. [46] 41 Rhaphoneis belgica var. intermedia Grun. [46] SYNEDRA 32-33 Synedra radians Kuetz. [49]

Fig.		Page
MERIDION
1-2-3	Meridion circulare (Grev.) Ag.	[40]
DIATOMA
4	Diatoma vulgare var. grande (Wm. Sm.) Grun.	[42]
5-6	Diatoma anceps (Ehr.) Kirchn.	[42]
7-8	Diatoma hiemale (Lyng.) Heib.	[42]
9-10	Diatoma vulgare Bory.	[42]
PLAGIOGRAMMA
11	Plagiogramma tessellatum Grev.	[43]
12	Plagiogramma obesum Grev.	[43]
13	Plagiogramma pygmæum Grev.	[43]
14	Plagiogramma wallichianum Grev.	[43]
EUNOTOGRAMMA
15	Eunotogramma læve Grun.	[33]
OPEPHORA
16-19	Opephora schwartzii (Grun.) Petit.	[43]
17	Opephora pinnata var. lanceolata n. var.	[44]
18	Opephora pacifica (Grun.) Petit.	[43]
FRAGILARIA
20-21	Fragilaria virescens Ralfs.	[44]
22-23	Fragilaria arctica Grun.	[44]
24-25-27-28-29	Fragilaria undata Wm. Sm.	[44]
26	Fragilaria undata Wm. Sm., var.?	[44]
30	Fragilaria construens (Ehr.) Grun.	[45]
31	Fragilaria harrisonii (Wm. Sm.) Grun.	[45]
34	Fragilaria capucina var. mesolepta Rab.	[45]
35	Fragilaria parasitica (Wm. Sm.)	[45]
36	Fragilaria sp. ?	[45]
37	Fragilaria linearis Cstr.	[45]
RHAPHONEIS
38	Rhaphoneis amphiceros Ehr.	[46]
39-40	Rhaphoneis amphiceros var. rhombica Grun.	[46]
41	Rhaphoneis belgica var. intermedia Grun.	[46]
SYNEDRA
32-33	Synedra radians Kuetz.	[49]

PLATE 11

Fig. Page SYNEDRA—Continued 1-5-6 Synedra ulna (Nitzsch) Ehr. Sporangial [47] 2 Synedra danica Kuetz. [48] 3 Synedra biceps (Kuetz.) A. S. [48] 4-7-11 Synedra ulna (Nitzsch) Ehr. [47] 8 Synedra capitata Ehr. [48] 9-18 Synedra acus Kuetz. [48] 10 Synedra fulgens (Grev.) Wm. Sm. [50] 12-13 Synedra goulardi Bréb. [48] 14-15-16 Synedra pulchella (Ralfs) Kuetz. [48] 17 Synedra pulchella var. abnormis Macchiati? [48]

Fig.		Page
SYNEDRA—Continued
1-5-6	Synedra ulna (Nitzsch) Ehr. Sporangial	[47]
2	Synedra danica Kuetz.	[48]
3	Synedra biceps (Kuetz.) A. S.	[48]
4-7-11	Synedra ulna (Nitzsch) Ehr.	[47]
8	Synedra capitata Ehr.	[48]
9-18	Synedra acus Kuetz.	[48]
10	Synedra fulgens (Grev.) Wm. Sm.	[50]
12-13	Synedra goulardi Bréb.	[48]
14-15-16	Synedra pulchella (Ralfs) Kuetz.	[48]
17	Synedra pulchella var. abnormis Macchiati?	[48]

PLATE 12

Fig. Page SYNEDRA—Continued 1 Synedra oxyrhynchus var. undulata Grun. [48] 2 Synedra pulchella var. flexella n. var. [49] 3 Synedra affinis Kuetz. [50] 4 Synedra affinis var. tabulata (Ag.) V. H. [50] 5-6 Synedra vaucheriæ var. parvula (Kuetz.) Rab. [49] 7 Synedra affinis var. parva (Kuetz.) V. H. [50] 8 Synedra radians (Kuetz.) H. L. S. [49] DIMEROGRAMMA 9-10 Dimerogramma marinum (Greg.) [46] 11 Dimerogramma surirella (Ehr.) Grun. [46] 12-13-14 Dimerogramma minus (Greg.) Ralfs. [47] TRACHYSPHENIA 15 Trachysphenia australis Petit. [47] ACTINELLA 16-17-18 Actinella punctata Lewis. [54] ASTERIONELLA 19-20-21 Asterionella formosa Hass. [50] 22 Asterionella inflata Heib. [50] EUNOTIA 23 Eunotia hemicyclus (Ehr.) Ralfs [53] 24-25 Eunotia lunaris (Ehr.) Grun. [53]

Fig.		Page
SYNEDRA—Continued
1	Synedra oxyrhynchus var. undulata Grun.	[48]
2	Synedra pulchella var. flexella n. var.	[49]
3	Synedra affinis Kuetz.	[50]
4	Synedra affinis var. tabulata (Ag.) V. H.	[50]
5-6	Synedra vaucheriæ var. parvula (Kuetz.) Rab.	[49]
7	Synedra affinis var. parva (Kuetz.) V. H.	[50]
8	Synedra radians (Kuetz.) H. L. S.	[49]
DIMEROGRAMMA
9-10	Dimerogramma marinum (Greg.)	[46]
11	Dimerogramma surirella (Ehr.) Grun.	[46]
12-13-14	Dimerogramma minus (Greg.) Ralfs.	[47]
TRACHYSPHENIA
15	Trachysphenia australis Petit.	[47]
ACTINELLA
16-17-18	Actinella punctata Lewis.	[54]
ASTERIONELLA
19-20-21	Asterionella formosa Hass.	[50]
22	Asterionella inflata Heib.	[50]
EUNOTIA
23	Eunotia hemicyclus (Ehr.) Ralfs	[53]
24-25	Eunotia lunaris (Ehr.) Grun.	[53]