The Diatomaceæ of Philadelphia and Vicinity

by Charles S. Boyer

PLATE 37

Fig. Page CYMATOPLEURA 1 Cymatopleura elliptica (Bréb.) Wm. Sm. [129] 2 Cymatopleura elliptica forma spiralis [129] 3-4 Cymatopleura marina Lewis [129] CAMPYLODISCUS 5 Campylodiscus hibernicus Ehr. [130] 6 Campylodiscus echeneis Ehr. [130]

Fig.		Page
CYMATOPLEURA
1	Cymatopleura elliptica (Bréb.) Wm. Sm.	[129]
2	Cymatopleura elliptica forma spiralis	[129]
3-4	Cymatopleura marina Lewis	[129]
CAMPYLODISCUS
5	Campylodiscus hibernicus Ehr.	[130]
6	Campylodiscus echeneis Ehr.	[130]