Gyrosigma gruendleri (Grunow in Cleve & Grunow) F.W. Mills, 1934 accepted as
Pleurosigma gruendleri Grunow, 1880 (new combination reference)
Plagiotropis vitrea var. trinitatis (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 accepted as
Amphiprora vitrea var. trinitatis Tempère & Peragallo, 1908 (new combination reference)
Pleurosigma acuminatum var. neglectum (McCall) F.W. Mills, 1934 accepted as
Gyrosigma acuminatum var. neglectum McCall, 1933 (new combination reference)
Pleurosigma attenuatum var. gigas (McCall) F.W. Mills, 1934 accepted as
Gyrosigma attenuatum var. gigas McCall, 1933 (new combination reference)
Pleurosigma balticum var. atlanticum (W. West) F.W. Mills, 1934 accepted as
Gyrosigma balticum var. atlanticum W. West, 1912 (new combination reference)
Pleurosigma balticum var. incurvum (Meister) F.W. Mills, 1934 accepted as
Gyrosigma balticum var. incurva Meister, 1932 (new combination reference)
Pleurosigma balticum var. sinensis (Ehrenberg; Ehrenberg) F.W. Mills, 1934 accepted as
Navicula sinensis Ehrenberg, 1847 (new combination reference)
Pleurosigma diaphanum (Cleve; Cleve) F.W. Mills, 1934 accepted as
Gyrosigma diaphanum Cleve, 1894 (new combination reference)
Pleurosigma distortum var. stauroneoides (Grunow in Cleve & Grunow) F.W. Mills, 1934 accepted as
Pleurosigma parkeri var. stauroneoides Grunow, 1880 (new combination reference)
Pleurosigma distortum var. undulatum McCAll accepted as
Gyrosigma distortum var. undulatum McCall, 1933 (new combination reference)
Pleurosigma fasciolum var. globifera (Meister) F.W. Mills, 1934 accepted as
Gyrosigma fasciola var. globifera Meister, 1932 (new combination reference)
Pleurosigma javanicum var. rhombica (Tempère & Peragallo) F.W. Mills, 1934 accepted as
Pleurostauron javanicum var. rhombica Tempère & Peragallo, 1911 (new combination reference)
Pleurosigma oceanicum (H. Peragallo) F.W. Mills, 1934 accepted as
Rhoicosigma oceanicum f. oceanicum H. Peragallo, 1891 (new combination reference)
Pleurosigma scalproides var. obliqua (Grunow) F.W.Mills, 1934 accepted as
Pleurosigma obliquum Grunow, 1880 (new combination reference)
Pleurosigma stuxbergii var. convexum (Grunow in Cleve & Grunow) F.W. Mills, 1934 accepted as
Pleurosigma strigosum var. convexum Grunow in Cleve & Grunow, 1880 (new combination reference)
Pleurosigma wansbeckii var. peisonis (Grunow) F.W. Mills, 1934 accepted as
Pleurosigma peisonis var. peisonis Grunow, 1860 (new combination reference)
Pleurosigma wansbeckii var. subsalina (H. Peragallo) F.W. Mills, 1934 accepted as
Pleurosigma spenceri var. subsalinum H. Peragallo, 1891 (new combination reference)
Podocystis spathulata var. oestrupii (Tempère & Peragallo) F.W. Mills, 1934 (new combination reference)
Podosira aspersus (Mann) F.W. Mills, 1934 accepted as
Hyalodiscus aspersus Mann, 1925 (new combination reference)
Polymyxus victoriae (Karsten) F.W. Mills, 1934 accepted as
Aulacodiscus victoriae Karsten, 1905 (new combination reference)
Porodiscus coronaria (Mann) F.W. Mills, 1934 accepted as
Melosira coronaria Mann, 1907 (new combination reference)
Porpeia quadriceps var. inflexa (Schmidt in Schmidt et al.) F.W. Mills, 1934 accepted as
Porpeia inflexa Schmidt in Schmidt et al., 1888 (new combination reference)
Porpeia quadriceps var. ornata (Greville) F.W. Mills, 1934 accepted as
Porpeia ornata Greville, 1865 (new combination reference)
Porpeia quadriceps var. quadrata (Greville) F.W. Mills, 1934 accepted as
Porpeia quadrata Greville, 1865 (new combination reference)
Porpeia quadriceps var. robusta (Truan y Luard & Witt) F.W. Mills, 1934 accepted as
Porpeia robusta Truan y Luard & Witt, 1888 (new combination reference)
Pseudauliscus triloculatus (Greville) F.W. Mills, 1934 (new combination reference)