Achnanthepyla bongrainii var. dilatata Perag., 1924 (original description)
Amphiprora acuta var. acuta M. Peragallo, 1924 (original description)
Amphiprora acuta var. minor M. Peragallo, 1924 (original description)
Amphiprora kerguelensis var. australis ‘Petit' M. Peragallo, 1924 (taxonomy source)
Amphiprora kerguelensis var. robusta M. Peragallo, 1924 (original description)
Amphiprora rigida M. Peragallo, 1924 (original description)
Amphora crassa var. antarctica M. Peragallo, 1924 (original description)
Amphora lanceolata var. perlonga M. Peragallo, 1924 (original description)
Amphora leudugeriana var. intermedia M. Peragallo, 1924 (original description)
Amphora leudugeriana var. minor M. Peragallo, 1924 (original description)
Amphora peragallorum var. minor M. Peragallo, 1924 (original description)
Biddulphia polymorpha f. belgicae (M. Peragallo) M. Peragallo, 1924 accepted as
Biddulphia belgicae var. belgicae M. Peragallo, 1921 (new combination reference)
Biddulphia polymorpha f. lata (M. Peragallo) M. Peragallo, 1924 accepted as
Biddulphia belgicae var. lata M. Peragallo, 1921 (new combination reference)
Biddulphia polymorpha f. ottomuellerii (Van Heurck) M. Peragallo, 1924 accepted as
Biddulphia ottomuelleri var. ottomuelleri Van Heurck, 1909 (new combination reference)
Biddulphia polymorpha f. rotunda (Van Heurck) M. Peragallo, 1924 accepted as
Biddulphia ottomuelleri var. rotunda Van Heurck, 1909 (new combination reference)
Biddulphia polymorpha var. anthropomorpha (Van Heurck) M. Peragallo, 1915 accepted as
Biddulphia anthropomorpha Van Heurck, 1909 (new combination reference)
Biddulphia polymorpha var. cruciata (Petit) M. Peragallo, 1924 accepted as
Biddulphia cruciata Petit, 1908 (new combination reference)
Biddulphia polymorpha var. vanheurckii (M. Peragallo) M. Peragallo, 1924 accepted as
Biddulphia vanheurckii f. vanheurckii M. Peragallo, 1921 (new combination reference)
Biddulphia suspecta M. Peragallo, 1924 (original description)
Cocconeis imperatrix f. minor M. Peragallo, 1924 (original description)
Cocconeis imperatrix var. acuta M. Peragallo, 1924 (original description)
Fragilaria castracanei var. elliptica M. Peragallo, 1924 (original description)
Licmophora charcotii var. bacillaris M. Peragallo, 1924 (original description)
Licmophora kamtschatica var. elongata M. Peragallo, 1924 (original description)
Licmophora latestriata M. Peragallo, 1924 (original description)
Licmophora wienckensis var. curta M. Peragallo, 1924 (original description)
Licmophora wienckensis var. wienckensis M. Peragallo, 1924 (original description)
Navicula cristata var. curta M. Peragallo, 1924 (original description)
Navicula frequens f. major Peragallo, 1924 (original description)
Navicula frequens var. frequens M. Peragallo, 1924 (original description)
Navicula longa var. curta M. Peragallo, 1924 (original description)
Navicula maginii M. Peragallo, 1924 (original description)
Navicula manginii M. Peragallo, 1924 (original description)
Navicula schuttii var. minor M. Peragallo, 1924 (original description)
Navicula theibaudii M. Peragallo, 1924 (original description)
Pleurosigma eudon var. stricta M. Peragallo, 1924 (original description)
Podosira vanheurckii var. striata M. Peragallo, 1924 (original description)
Rhoicosigma arcticum var. major M. Peragallo, 1924 (original description)
Trachyneis oblonga var. minor M. Peragallo, 1924 (original description)
Tropidoneis maxima var. gracillima M. Peragallo, 1924 (original description)