The Diatomaceæ of Philadelphia and Vicinity

by Charles S. Boyer

PLATE 16

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]