Caloneis liber var. asiatica (Tempère & Brun in Brun & Tempère) F.W. Mills, 1934 accepted as
Navicula maxima var. asiatica Tempère & Brun in Brun & Tempère, 1889 (new combination reference)
Diploneis ovalis var. directa (Pantocsek) F.W. Mills, 1934 accepted as
Navicula oblongella var. directa Pantocsek, 1902 (new combination reference)
Diploneis splendida var. ornata F.W. Mills, 1934 (original description)
Navicula liber f. tenuistriata (Cleve) F.W. Mills, 1934 accepted as
Caloneis liber f. tenuistriata (Cleve) M. Peragallo, 1903 accepted as
Caloneis liber f. tenuistriata Cleve, 1894 (new combination reference)
Navicula maculata var. crucitina (H. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 (new combination reference)
Navicula maculata var. gigas (Tempère & Peragallo) F.W. Mills, 1934 accepted as
Navicula fischeri var. gigas Tempère & Peragallo, 1908 (new combination reference)
Navicula maculata var. major (Tempère & Peragallo) F.W. Mills, 1934 (new combination reference)
Navicula major (sensu Dippel) F.W. Mills, 1934 (new combination reference)
Navicula major f. hankensis (Skvortzow) F.W. Mills, 1934 (new combination reference)
Navicula major f. neglecta (Mayer) F.W. Mills, 1934 accepted as
Pinnularia major var. neglecta Mayer, 1913 (new combination reference)
Navicula major var. convergens (Meister) F.W. Mills, 1934 accepted as
Pinnularia major var. convergens Meister, 1912 (new combination reference)
Navicula major var. distinguenda (Cleve) F.W.Mills, 1934 † accepted as
Pinnularia viridis var. distinguenda Cleve, 1891 † (new combination reference)
Navicula major var. dubia (Mc Call) F.W. Mills, 1934 accepted as
Pinnularia major var. dubia McCall, 1933 (new combination reference)
Navicula major var. heribaudii (McCall) F.W. Mills, 1934 accepted as
Pinnularia major var. heribaudii McCall, 1933 (new combination reference)
Navicula major var. hyalina (Hustedt) F.W. Mills, 1934 accepted as
Pinnularia major var. hyalina (Hustedt) Skabichevskii, 1942 (new combination reference)
Navicula major var. lacustris (Meister) F.W. Mills, 1934 (new combination reference)
Navicula major var. leptogongyla (Ehrenberg; Mayer) F.W.Mills, 1934 accepted as
Navicula leptogongyla Ehrenberg, 1843 (new combination reference)
Navicula major var. paludosa (Meister) F.W. Mills, 1934 accepted as
Pinnularia major var. paludosa Meister, 1912 (new combination reference)
Navicula major var. pulchella (Boyer) F.W.Mills, 1934 accepted as
Pinnularia major var. pulchella Boyer, 1916 † (new combination reference)
Navicula major var. uligenosa (Meister) F.W. Mills, 1934 accepted as
Pinnularia major var. uligenosa Meister (new combination reference)
Navicula marina var. finmarchica (Grunow in Cleve & Grunow) F.W. Mills, 1934 accepted as
Navicula cluthensis var. finmarchica Grunow in Cleve & Grunow, 1880 (new combination reference)
Navicula marina var. maculifera (Cleve) F.W. Mills, 1934 accepted as
Navicula cluthensis var. maculifera Cleve, 1881 (new combination reference)
Navicula marina var. minuta (Cleve) F.W. Mills, 1934 accepted as
Navicula cluthensis var. minuta Cleve, 1881 (new combination reference)
Navicula marina var. novaezealandiae (Grunow) F.W. Mills, 1934 accepted as
Navicula cluthensis var. novaezealandiae Grunow, 1884 (new combination reference)
Navicula marina var. pagophila (Grunow) F.W. Mills, 1934 accepted as
Navicula cluthensis var. pagophila Grunow, 1884 (new combination reference)
Navicula marina var. striolata (Grunow) F.W. Mills, 1934 accepted as
Navicula cluthensis var. striolata Grunow, 1884 (new combination reference)
Navicula mesolepta var. densecostata (Rochoux d'Aubert in Heribaud et al.) F.W. Mills, 1934 accepted as
Navicula megaloptera var. densecostata Rochoux d'Aubert in Héribaud et al., 1920 (new combination reference)
Navicula monilifera var. constricta (Peragallo & Peragallo) F.W. Mills, 1934 accepted as
Navicula granulata var. constricta H. Peragallo & M. Peragallo, 1898 (new combination reference)
Navicula ovalis var. directa (Pantocsek) F.W. Mills, 1934 accepted as
Navicula oblongella var. directa Pantocsek, 1902 (new combination reference)
Navicula peregrina f. acuta (Mayer) F.W. Mills, 1934 (new combination reference)
Navicula pinnularia f. interrupta (Heiden in Schmidt et al.) F.W. Mills, 1934 (new combination reference)
Navicula placentula var. minor (Krasske) F.W. Mills, 1934 accepted as
Navicula placenta var. minor Krasske, 1923 (new combination reference)
Navicula platessa Cleve, 1881 accepted as
Diploneis platessa Cleve & Grove in Cleve, 1894 (new combination reference)
Navicula producta var. acuta F.W. Mills, 1934 (original description)
Navicula pupula var. lucida (Lauby) F.W. Mills, 1934 (new combination reference)
Navicula radiosa f. gallica (Heribaud) F.W. Mills, 1934 accepted as
Navicula dubravicensis var. gallica Héribaud, 1908 (new combination reference)
Navicula recta var. recta F.W. Mills, 1934 (original description)
Navicula recta var. signata F.W. Mills, 1934 (original description)
Navicula rectangulata f. subundulata (Cleve) F.W. Mills, 1934 (new combination reference)
Navicula rhomboides f. antarctica (Van Heurck) F.W. Mills, 1934 (new combination reference)
Navicula rhomboides f. saxonica (Rabenhorst; Rabenhorst) F.W. Mills, 1934 accepted as
Frustulia saxonica f. saxonica Rabenhorst, 1851 (new combination reference)
Navicula rhomboides var. viridula (Brébisson) F.W. Mills, 1934 accepted as
Colletonema viridulum Brébisson ex Kützing, 1849 (new combination reference)
Navicula rhomboides var. vitrea (Østrup) F.W.Mills, 1934 accepted as
Frustulia vitrea Østrup, 1901 (new combination reference)
Navicula rhynchocephala var. robusta (Rabenhorst) F.W. Mills, 1934 (new combination reference)
Navicula scopulorum var. craticularia (Peragallo & Peragallo) F.W. Mills, 1934 (new combination reference)
Navicula silicula var. alpina (Cleve) F.W. Mills, 1934 (new combination reference)
Navicula smithii var. chilensis (Hustedt) F.W. Mills, 1934 accepted as
Diploneis smithii var. chilensis Hustedt, 1927 (new combination reference)
Navicula smithii var. permagna (Cleve-Euler) F.W. Mills, 1934 accepted as
Diploneis smithii var. permagna Cleve-Euler, 1915 (new combination reference)
Navicula smithii var. recta (M. Peragallo in Peragallo & Peragallo) F.W. Mills, 1934 accepted as
Diploneis smithii var. recta M. Peragallo in Peragallo & Peragallo, 1911 (new combination reference)
Navicula smithii var. rhombica (Mereschkowsky) F.W. Mills, 1934 accepted as
Diploneis smithii var. rhombica Mereschkowsky, 1902 (new combination reference)
Navicula spectabilis f. moelleriana (Janisch in Schmidt et al.) F.W. Mills, 1934 accepted as
Navicula bullata var. moelleriana Janisch in Schmidt et al., 1881 (new combination reference)
Navicula sphaerophora f. alpha (Otto Müller) F.W. Mills, 1934 (new combination reference)
Navicula sphaerophora f. capitata (Otto Müller) F.W. Mills, 1934 (new combination reference)
Navicula sphaerophora f. curta (Otto Müller) F.W. Mills, 1934 (new combination reference)
Navicula sphaerophora f. elliptica (Otto Müller) F.W. Mills, 1934 accepted as
Anomoeoneis sphaerophora f. elliptica Otto Müller, 1899 (new combination reference)
Navicula sphaerophora f. elongata (Otto Müller) F.W. Mills, 1934 (new combination reference)
Navicula sphaerophora f. navicularis (Otto Müller) F.W. Mills, 1934 accepted as
Anomoeoneis sphaerophora f. navicularis Otto Müller, 1899 (new combination reference)
Navicula sphaerophora f. rostrata (Ehrenberg) F.W.Mills, 1934 accepted as
Navicula rostrata Ehrenberg, 1840 (new combination reference)
Navicula sphaerophora f. truncata (Otto Müller) F.W. Mills, 1934 (new combination reference)
Navicula sphaerophora var. guentheri (Otto Müller) F.W. Mills, 1934 (new combination reference)
Navicula sphaerophora var. intermedia (McCall) F.W. Mills, 1934 accepted as
Anomoeoneis sphaerophora var. intermedia McCall, 1933 (new combination reference)
Navicula sphaerophora var. polygramma (Ehrenberg) F.W. Mills, 1934 accepted as
Stauroneis polygramma Ehrenberg, 1843 (new combination reference)
Navicula stabilis F. Adams collection, 1934 (original description)
Navicula stauroptera var. genuina (Mayer) F.W. Mills, 1934 accepted as
Pinnularia stauroptera f. genuina Mayer, 1916 (1917) (new combination reference)
Navicula stauroptera var. gibba (A. Cleve) F.W. Mills, 1934 accepted as
Pinnularia stauroptera var. gibba A. Cleve, 1895 (new combination reference)
Navicula stauroptera var. linearis (Østrup) F.W. Mills, 1934 accepted as
Pinnularia stauroptera var. linearis Østrup, 1910 (new combination reference)
Navicula stomatophora f. triundulata (Fontell) F.W. Mills, 1934 (new combination reference)
Navicula stuxbergii var. bicontracta (Østrup) F.W. Mills, 1934 accepted as
Navicula pinnularia var. bicontracta Østrup, 1895 (new combination reference)
Navicula stuxbergii var. gibbosa (Østrup) F.W. Mills, 1934 accepted as
Navicula pinnularia var. gibbosa Østrup, 1895 (new combination reference)
Nitzschia sigmatella var. armoricana (Kützing) F.W. Mills, 1934 (new combination reference)
Pinnularia major var. pagesii (Heribaud in Heribaud et al.) F.W. Mills, 1934 accepted as
Navicula major var. pagesii Héribaud in Héribaud et al., 1920 (new combination reference)
Pinnularia stuxbergii var. leptostauron (Cleve; Grunow) F.W. Mills, 1934 accepted as
Navicula stuxbergii var. leptostauron Cleve, 1883 (new combination reference)
Pinnularia stuxbergii var. stuxbergii (Cleve in Cleve & Grunow) F.W. Mills, 1934 accepted as
Navicula stuxbergii var. stuxbergii Cleve in Cleve & Grunow, 1880 (new combination reference)
Pinnularia stuxbergii var. subcontinua (Cleve; Grunow) F.W. Mills, 1934 accepted as
Navicula stuxbergii var. subcontinua Cleve, 1883 (new combination reference)