The Diatomaceæ of Philadelphia and Vicinity

by Charles S. Boyer

PLATE 1

Fig. Page MELOSEIRA 3-4 Meloseira roeseana var. epidendron (Ehr.) Grun. [15] 5-6 Meloseira roeseana Rab. [15] 8-9 Meloseira distans (Ehr.) Kuetz. [14] 10 Meloseira granulata (Ehr.) Ralfs [15] 11-12 Meloseira sulcata Kuetz. [15] 15-16-17 Meloseira undulata (Ehr.) Kuetz. [15] GAILLONELLA 13-14 Gaillonella nummuloides (Dillw.) Bory [16] LYSIGONIUM 7 Lysigonium moniliforme (Muell.) Link. [16] 18-19 Lysigonium varians (Ag.) De Toni [17] HYALODISCUS 20 Hyalodiscus scoticus (Kuetz.) Grun. [18] 21 Hyalodiscus radiatus var. arctica Grun. [17] 22 Hyalodiscus stelliger Bail. [17] Note.—The figures in all of the plates, except when otherwise noted, are magnified 800 diameters.

Fig.		Page
MELOSEIRA
3-4	Meloseira roeseana var. epidendron (Ehr.) Grun.	[15]
5-6	Meloseira roeseana Rab.	[15]
8-9	Meloseira distans (Ehr.) Kuetz.	[14]
10	Meloseira granulata (Ehr.) Ralfs	[15]
11-12	Meloseira sulcata Kuetz.	[15]
15-16-17	Meloseira undulata (Ehr.) Kuetz.	[15]
GAILLONELLA
13-14	Gaillonella nummuloides (Dillw.) Bory	[16]
LYSIGONIUM
7	Lysigonium moniliforme (Muell.) Link.	[16]
18-19	Lysigonium varians (Ag.) De Toni	[17]
HYALODISCUS
20	Hyalodiscus scoticus (Kuetz.) Grun.	[18]
21	Hyalodiscus radiatus var. arctica Grun.	[17]
22	Hyalodiscus stelliger Bail.	[17]
Note.—The figures in all of the plates, except when otherwise noted, are magnified 800 diameters.