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| Eunotia lunaris var. emarginatovalida W. West 1912 |
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| Gyrosigma balticum var. atlanticum W. West 1912 |
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| Melosira borreri (borrerii) f. minor W. West 1912 |
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| Melosira moniliformis f. minor W. West 1912 |
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| Navicula balnearis var. major W. West 1912 |
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| Navicula lyra f. minor W. West 1912 |
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| Navicula mesolepta var. protensa W. West 1912 |
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| Navicula musca f. parva W. West 1912 |
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| Navicula peregrina var. producta W. West 1912 |
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| Navicula pusilla var. pusillissima W. West 1912 |
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| Navicula smithii var. minor W. West 1912 |
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| Navicula trevelyana var. minor W. West 1912 |
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| Navicula viridis var. angustatum W. West 1912 |
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| Stauroneis anceps var. lata W. West 1912 |
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| Stauroneis phoenicenteron f. producta W. West 1912 |
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| Stauroneis phoenicenteron var. producta W. West 1912 |
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| Surirella ovalis var. submamillata W. West 1912 |
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