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The Diatomaceæ of Philadelphia and Vicinity

Chapter 142: PLATE 40
By Charles S. Boyer
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About This Book

A systematic regional survey of diatoms collected in and around Philadelphia and within about a one-hundred-mile radius, presenting species descriptions, habitat notes, fossil occurrences, and ecological observations. The author outlines local geology and hydrology, sampling locations (rivers, creeks, ponds, bays, wells, bogs), preparation and microscopic methods, and provides detailed species accounts illustrated by seven hundred uniformly scaled drawings. The text discusses freshwater, brackish, and marine forms, distribution patterns, seasonal and environmental influences on diatom growth, and the use of diatoms in water analysis, stratigraphy, and biological studies, aiming to support further research.

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

PLATE 38

Fig. Page
1 Amphora gigantea var. fusca A. S. 65
2 Meloseira crenulata (Ehr.) Kuetz. 15
3-4 Licmophora baileyi (Edw.) Grun. 40
5 Coscinodiscus polyacanthus Grun. 22
6-7 Ditylum intricatum (West) Grun. 30
8 Pyxidicula cruciata Ehr. 19
9 Gyrosigma scalproides (Rab.) Cl. 76
10 Coscinodiscus asteromphalus var. omphalantha (Ehr.) Grun. 23
11 Rhabdonema minutum Kuetz. 36
12 Gyrosigma kuetzingii (Grun.) Cl. 76
13 Gyrosigma prolongatum (Wm. Sm.) Cl. 76
14 Cymbella parva (Wm. Sm.) Cl. 61
15 Gomphoneis herculaneum (Ehr.) Cl. (zone view) 70
16 Cymbella ventricosa Kuetz. 62
17-18 Eunotia sp. (abnormal?) 54
Fig. Page
1 Amphora gigantea var. fusca A. S. 65
2 Meloseira crenulata (Ehr.) Kuetz. 15
3-4 Licmophora baileyi (Edw.) Grun. 40
5 Coscinodiscus polyacanthus Grun. 22
6-7 Ditylum intricatum (West) Grun. 30
8 Pyxidicula cruciata Ehr. 19
9 Gyrosigma scalproides (Rab.) Cl. 76
10 Coscinodiscus asteromphalus var. omphalantha (Ehr.) Grun. 23
11 Rhabdonema minutum Kuetz. 36
12 Gyrosigma kuetzingii (Grun.) Cl. 76
13 Gyrosigma prolongatum (Wm. Sm.) Cl. 76
14 Cymbella parva (Wm. Sm.) Cl. 61
15 Gomphoneis herculaneum (Ehr.) Cl. (zone view) 70
16 Cymbella ventricosa Kuetz. 62
17-18 Eunotia sp. (abnormal?) 54

PLATE 39

Fig. Page
1 Nitzschia spectabilis var. americana Grun. (zone view) 122
2 Nitzschia panduriformis Greg. 117
3 Hantzschia amphioxys (Ehr.) Grun. 113
4 Hantzschia amphioxys var. major Grun. 114
5 Nitzschia dubia Wm. Sm. 118
6 Nitzschia amphioxys Wm. Sm. 114
7 Nitzschia compressa (Bail.) 116
8 Nitzschia compressa var. minor H. L. Smith 116
9 Surirella intermedia Lewis (zone view) 128
10 Surirella arctissima A. S. forma minor 128
11 Surirella ovalis Bréb. 126
12 Surirella biseriata (Ehr.) Bréb. 124
13 Nitzschia sigma (Kuetz.) Wm. Sm. 121
14 Nitzschia obtusa var. flexella H. L. Smith 121
15 Stauroneis legumen Ehr. 89
16 Nitzschia obtusa Wm. Sm. 121
Fig. Page
1 Nitzschia spectabilis var. americana Grun. (zone view) 122
2 Nitzschia panduriformis Greg. 117
3 Hantzschia amphioxys (Ehr.) Grun. 113
4 Hantzschia amphioxys var. major Grun. 114
5 Nitzschia dubia Wm. Sm. 118
6 Nitzschia amphioxys Wm. Sm. 114
7 Nitzschia compressa (Bail.) 116
8 Nitzschia compressa var. minor H. L. Smith 116
9 Surirella intermedia Lewis (zone view) 128
10 Surirella arctissima A. S. forma minor 128
11 Surirella ovalis Bréb. 126
12 Surirella biseriata (Ehr.) Bréb. 124
13 Nitzschia sigma (Kuetz.) Wm. Sm. 121
14 Nitzschia obtusa var. flexella H. L. Smith 121
15 Stauroneis legumen Ehr. 89
16 Nitzschia obtusa Wm. Sm. 121

PLATE 40

Fig. Page
1 Caloneis liber (Wm. Sm.) Cl. 81
2 Anomœoneis sphærophora (Kuetz.) Cl. 80
3 Nitzschia spathulata Bréb. 120
4 Stauroneis ? abnormal 89
5 Navicula ? abnormal 101
6 Podocystis adriatica Kuetz. 129
7 Nitzschia dissipata (Kuetz.) Grun. 120
8 Cymbella ventricosa Kuetz. (zone view) 62
9 Navicula radiosa Kuetz. (zone view) 94
10 Detail of Rhabdonema arcuatum (Lyng.) Kuetz. 35
11 Diatoma anceps (Ehr.) Kirchn. (containing chromataphores) 42
12 Coscinodiscus asteromphalus Ehr. (trans. section, after Pelletan) 23
13-14-15 Transverse section (diagram) of Pinnularia showing straight, oblique and grooved raphes 101
16 Transverse section (diagram) of Biddulphia favus showing inner punctate stratum (after Deby) 31
17 Transverse (ideal) section of Surirella 124
18-19 Transverse (ideal) section of Pinnularia, before and after division 101
20 Transverse section of Nitzschia linearis (Ag.) Wm. Sm. 122
21 Transverse section (diagram) of Navicula 89
22 Transverse section (diagram) of Cymbella 60
23 Transverse section (diagram) of Amphora 65
Fig. Page
1 Caloneis liber (Wm. Sm.) Cl. 81
2 Anomœoneis sphærophora (Kuetz.) Cl. 80
3 Nitzschia spathulata Bréb. 120
4 Stauroneis ? abnormal 89
5 Navicula ? abnormal 101
6 Podocystis adriatica Kuetz. 129
7 Nitzschia dissipata (Kuetz.) Grun. 120
8 Cymbella ventricosa Kuetz. (zone view) 62
9 Navicula radiosa Kuetz. (zone view) 94
10 Detail of Rhabdonema arcuatum (Lyng.) Kuetz. 35
11 Diatoma anceps (Ehr.) Kirchn. (containing chromataphores) 42
12 Coscinodiscus asteromphalus Ehr. (trans. section, after Pelletan) 23
13-14-15 Transverse section (diagram) of Pinnularia showing straight, oblique and grooved raphes 101
16 Transverse section (diagram) of Biddulphia favus showing inner punctate stratum (after Deby) 31
17 Transverse (ideal) section of Surirella 124
18-19 Transverse (ideal) section of Pinnularia, before and after division 101
20 Transverse section of Nitzschia linearis (Ag.) Wm. Sm. 122
21 Transverse section (diagram) of Navicula 89
22 Transverse section (diagram) of Cymbella 60
23 Transverse section (diagram) of Amphora 65