The Diatomaceæ of Philadelphia and Vicinity

by Charles S. Boyer

PLATE 31

Fig. Page NAVICULA 1 Navicula elegans Wm. Sm. [101] 2 Navicula elegans var. cuspidata Cl. [101] 3-4 Navicula grevillei (Ag.) Cl. [99] 5 Navicula libellus Greg. [99] 6-7 Navicula palpebralis Bréb. [101] 8 Navicula rhyncocephala Kuetz. [97] 9 Navicula cryptocephala Kuetz. [97] 10 Navicula longa (Greg.) Ralfs. [97] PINNULARIA 11 Pinnularia brébissonii (Kuetz.) Cl. [107] 12 Pinnularia borealis Ehr. [109] 13 Pinnularia divergens var. elliptica Grun. [107] EPITHEMIA 14 Epithemia turgida (Ehr.) Kuetz. [111] 15-21 Epithemia argus Kuetz. [111] 16 Epithemia argus var.? [111] 17 Epithemia muelleri A. S. [111] 18 Epithemia zebra var. proboscidea (Kuetz.) Grun. [112] 19 Epithemia gibberula var. producta Grun. [112] 20 Epithemia musculus Kuetz. [112] 22 Epithemia musculus var. constricta (Bréb.) V. H. [112] RHOPALODIA 23 Rhopalodia gibba (Kuetz.) Mueller [112] 24 Rhopalodia ventricosa (Kuetz.) Mueller [113]

Fig.		Page
NAVICULA
1	Navicula elegans Wm. Sm.	[101]
2	Navicula elegans var. cuspidata Cl.	[101]
3-4	Navicula grevillei (Ag.) Cl.	[99]
5	Navicula libellus Greg.	[99]
6-7	Navicula palpebralis Bréb.	[101]
8	Navicula rhyncocephala Kuetz.	[97]
9	Navicula cryptocephala Kuetz.	[97]
10	Navicula longa (Greg.) Ralfs.	[97]
PINNULARIA
11	Pinnularia brébissonii (Kuetz.) Cl.	[107]
12	Pinnularia borealis Ehr.	[109]
13	Pinnularia divergens var. elliptica Grun.	[107]
EPITHEMIA
14	Epithemia turgida (Ehr.) Kuetz.	[111]
15-21	Epithemia argus Kuetz.	[111]
16	Epithemia argus var.?	[111]
17	Epithemia muelleri A. S.	[111]
18	Epithemia zebra var. proboscidea (Kuetz.) Grun.	[112]
19	Epithemia gibberula var. producta Grun.	[112]
20	Epithemia musculus Kuetz.	[112]
22	Epithemia musculus var. constricta (Bréb.) V. H.	[112]
RHOPALODIA
23	Rhopalodia gibba (Kuetz.) Mueller	[112]
24	Rhopalodia ventricosa (Kuetz.) Mueller	[113]