206 spenceri (Pleurosigma) : Van Heurck 406 : Minehead (Somerset) England spenceri (Pleurosigma) : Van Heurck 25 : Deurne (Antwerpen) Belgium spenceri (Pleurosigma) (Queket) W. Smith : Tilden 90 : Mississippi River (Minnesota) US spenceri (Pleurosigma) Quekett : H.L. Smith 412 : Aubigny (Calvados) France spenceri (Pleurosigma) W. Smith : Rabenhorst 1105 : Dresden (Dresden) GDR spenceri (Pleurosigma) W. Smith : Rabenhorst 2016 : Falaise (Calvados) France spenceri (Pleurosigma) W. Smith : Rabenhorst 2411 : Allahabad (Uttar Pradesh) India spenceri (Pleurosigma) W. Smith : Cleve & Möller 256 : Lymington (Hampshire) England spenceri (Pleurosigma) W. Smith : Kitton 44 : Ormesby (Norfolk) England spenceri (Pleurosigma) W. Smith v. acutiuscula Grunow : Van Heurck 183 : Bruxelles (Brabant) Belgium spenceri (Pleurosigma) v. curvula Grunow : Cleve & Möller 202 : Weston (Somerset) England spenceri (Pleurosigma) v. curvula Grunow : Hauck & Richter 50 : Kötzschau (Leipzig) GDR spenceri (Pleurosigma) v. curvula Grunow : Van Heurck 185 : Queen's Island (Antrim[?]) Northern Ireland spenceri (Pleurosigma) W. Smith v. curvula Grunow : Hauck & Richter 49 : Jahde (Niedersachsen) FRG spenceri (Pleurosigma) W. Smith v. nodiferum Grunow : Van Heurck 184 : Bruxelles (Brabant) Belgium spenceri (Pleurosigma) v. peisonis Grunow : Van Heurck 192 : (Schleswig-Holstein) FRG spenceri (Pleurosigma) v. smithii Grunow : Van Heurck 186 : Kingston-upon-Hull (Humberside) England spenceri (Pleurosigma) v. [unnamed] : Rabenhorst 2353 : Calcutta (West Bengal) India spenceri (Pleurosigma) v. [unnamed] : Rabenhorst 2432 : Jumna-Strom (Uttar Pradesh) India spenceri (Pleurosigma) v. [unnamed] : Van Heurck 131 : Austuweel (Antwerpen) Belgium spenceri (Pleurosigma) v. [unnamed] : Van Heurck 396 : Rouge-Cloître (Brabant) Belgium spencerii (Navicula) J.W. Bailey : Rabenhorst 2016 : Falaise (Calvados) France spencerii (Pleurosigma), see spenceri (Pleurosigma) : H.L. Smith 412; Rabenhorst 1105, 2016, 2372, 2411, 2432; Tilden 90; Van Heurck 25, 83, 183, 184, 185,186, 192, 396 spencerii (Pleurosigma), see spenceri (Pleurosigma) : Rabenhorst 2353 sphaerica (Creswellia) Greville : H.L. Smith 637 : Denmark Spaerophora :: see globulifera sphaerophora (Navicula) : Ekart, ser. 2, 531 : Arena Po (Lombardia) Italy sphaerophora (Navicula) : Kitton 67 : Whissonsett (Norfolk) England sphaerophora (Navicula) : Van Heurck 190 : Antwerp (Antwerpen) Belgium sphaerophora (Navicula) (Kützing) W. Smith : Rabenhorst 1718 : Buhayrat at-Timsah (Al Isma Iliyah) Egypt sphaerophora (Navicula) Ehrenberg : Cleve & Möller 244 : Uppsala (Uppsala) Sweden sphaerophora (Navicula) Kützing : Cleve & Möller 94 : Gronowitz[?] (Silesia) Poland sphaerophora (Navicula) Kützing : Cleve & Möller 239 : Uppsala (Uppsala) Sweden sphaerophora (Navicula) Kützing : Eulenstein 75 : Stuttgart (Baden-Württemberg) FRG sphaerophora (Navicula) Kützing : H.L. Smith 324 : Couvrigny (Calvados) France sphaerophora (Navicula) Kützing : Rabenhorst 2352 : Rangoon Lake (West Bengal) India sphaerophora (Navicula) Kützing : Tilden 248 : Seattle (Washington) US sphaerophora (Navicula) Kützing : Van Heurck 76 : La Hulpe (Brabant) Belgium sphaerophora (Navicula) Kützing : Van Heurck 124 : Sint-Josse-ten-Noode (Brabant) Belgium sphaerophora (Navicula) v. biceps (Ehrenberg) [?] : Van Heurck 123 : Cheb (Zapadocesky) Czechoslovakia sphaerophora (Navicula) v. [unnamed] : Cleve & Möller 263 : Cheb (Západočeský) Czechoslovakia sphaerophora (Navicula) (Kützing) W. Smith v. [unnamed] : Rabenhorst 1717 : Buhayrat at-Timsah (Al Isma Iliyah) Egypt sphaerophora (Navicula) Kützing v. [unnamed] : Rabenhorst 2353 : Calcutta (West Bengal) India Sphaerozona :: see excavatum Sphenella :: see angustata, naviculoides, olivacea, parvula, vulgaris spica (Odontodiscus) Ehrenberg : Cleve & Möller 57 : Richmond (Virginia) US spicata (Stauroneis) Dickie : Cleve & Möller 197 : Baakens River (Cape of Good Hope) South Africa spicula (Stauroneis) Dickie [nec] : Hauck & Richter 50 : Kötzschau (Leipzig) GDR spicula (Stauroneis) Hickie : H.L. Smith 501 : Newark (New Jersey) US spicula (Stauroneis) Hickie : Hauck & Richter 50 : Kötzschau (Leipzig) GDR spicula (Stauroneis) Hickie : Van Heurck 9 : Swansea (West Glamorgan) Wales spinescens (Micromega) : H.L. Smith 481 : Venezia (Veneto) Italy