427 Richmond (Virginia) US : Van Heurck 541 : [No taxa listed] Richmond River (New South Wales) Australia : Cleve & Möller 220 : Melosira punctata (W. Smith) [Cleve & Möller] v. granulata Ehrenberg Richmond River (New South Wales) Australia : Cleve & Möller 220 : Melosira punctata (W. Smith) [Cleve & Möller] v. procera Ehrenberg Riegersdorf (Wrocław) Poland : Rabenhorst 804 : Pinnularia gibba Ehrenberg Riegersdorf (Wrocław) Poland : Rabenhorst 804 : Pinnularia tabellaría Ehrenberg Riegersdorf (Wrocław) Poland : Rabenhorst 952 : Pinnularia major Riegersdorf (Wrocław) Poland : Rabenhorst 952 : Pinnularia medioconstricta Rabenhorst Riegersdorf (Wrocław) Poland : Rabenhorst 952 : Pinnularia nobilis Riegersdorf (Wrocław) Poland : Rabenhorst 952 : Pinnularia viridis Riegersdorf, see also Strzelin (Wrocław) Poland : Rabenhorst 804, 952 Riesengebirge, Czechoslovakia[?] : Hauck & Richter 149 : Eunotia minor Riesengebirge, Czechoslovakia[?] : Hauck & Richter 149 : Fragilaria bipunctata Riesengebirge, Czechoslovakia[?] : Hauck & Richter 149 : Fragilaria virescens Ralfs Riethäuschen (Sankt Gallen) Switzerland : Rabenhorst 1081 : Denticula elegans Kützing Riethäuschen (Sankt Gallen) Switzerland : Wartmann & Schenk 126 : Denticula elegans Kützing Riethäuschen, see also Sankt Gallen (Sankt Gallen) Switzerland : Rabenhorst 1081; Wartmann & Schenk 337 Rieu de Barges, see Tournai : Westendorp 497 Rignitz [fluss], see Erlangen (Bayern) FRG : Rabenhorst 1693 Ringgenberg, see Interlaken (Bern) Switzerland : Rabenhorst 2371 Rinsumageest (Friesland) Netherlands : Rabenhorst 982 : Schizonema dillwynii C. Agardh Rinsumageest (Friesland) Netherlands : Rabenhorst 1042 : Diatom elongatum Rinsumageest (Friesland) Netherlands : Rabenhorst 1042 : Melosira subflexilis Rinsumageest (Friesland) Netherlands : Rabenhorst 1042 : Nitzschia reversa W. Smith Rio Brasso, see Santos (São Paulo) Brazil : Cleve & Möller 213 Rio de Janeiro (Rio de Janeiro) Brazil : H.L. Smith 374 : Nitzschia ventricosa Kitton Rio de Janeiro (Rio de Janeiro) Brazil : H.L. Smith 420 : Podosira maculata W. Smith Rio de Janeiro (Rio de Janeiro) Brazil : H.L. Smith 420 : Triceratium favus Rio de Janeiro (Rio de Janeiro) Brazil : H.L. Smith 625 : Triceratium roperi ana Greville Rio de Janeiro (Rio de Janeiro) Brazil : Rabenhorst 2489 : Pododiscus jamacien sis Kützing Rio de Janeiro) Brazil :: see Rio de Janeiro Rio Janiero, see Rio de Janeiro (Rio de Janeiro) Brazil : H.L. Smith 374, 625; Rabenhorst 2489 Rio Michatoya (Guatemala) Guatemala : Tilden 625 : Melosira granulata (Ehrenberg) Ralfs Ripats, see Gällivare (Norrbotten) Sweden : Cleve & Möller 85 : Navicula crassinervia Brébis son Risberg (Värmland) Sweden : Cleve & Möller 85 : Vanheurckia crassinervia Riva, see Valdobbia, Monti della (Trentino-Alto-Adige) Italy : Ekart, ser. 2, 486 Rivarolo [Ligure], see Polcevara (Liguria) Italy : Ékart, ser. 2, 485 River Bure, see Bure River (Norfolk) England : Kitton 72, 73 River Catuche, see Catuche River (Anzoátegui) Venezuela : H.L. Smith 350 R[iver] Coquet, see Coquet River (Northumberland) England : H.L. Smith 180 River Dart, see Dart River (Devon) England : Wyatt 232 River Findhorn, see Findhorn River (Grampian) Scotland : H.L. Smith 495 River Saguenay, see Saguenay River (Québec) Canada : H.L. Smith 573 River S[ain]t Lawrence, see Saint Lawrence River, Canada : H.L. Smith 378 Rivière d' di'Orne, see Orne, Rivière d' (Calvados) France : Desmazières, ed. 1, 909 Rocca, [Monte?] (Lombardia[?]) Italy : Ekart, ser. 2, 384 : Ceratoneis arcus f. gracilis Rocca, [Monte?] (Lombardia[?]) Italy : Ekart, ser. 2, 384 : Fragilaria capucina Rocca, [Monte?] (Lombardia[?]) Italy : Ekart, ser. 2, 384 : Meridion sp. Rocca, [Monte?] (Lombardia[?]) Italy : Ekart, ser. 2, 384 : Odontidium sp. Rochehaut (Luxembourg) Belgium : Van Heurck 164 : Vanheurckia vulgaris (Thwaites) Van Heuruel Rochehaut (Luxembourg) Belgium : Van Heurck 281 : Ceratoneis arcus Kützing Rochehaut (Luxembourg) Belgium : Van Heurck 281 : Gomphonema angustatum v. [unnamed] Rochehaut (Luxembourg) Belgium : Van Heurck 281 : Gomphonema micropus [cf] Rochehaut (Luxembourg) Belgium : Van Heurck 281 : Gomphonema parvulum Rogaland) Norway :: see Stav Semger Roggenstorf (Rostock) GDR : Hauck & Richter 298 : Amphora hyalina Roggenstorf (Rostock) GDR : Hauck & Richter 298 : Fragilaria capucina Desmazières v. mesolepta Rabenhorst Roggenstorf (Rostock) GDR : Hauck & Richter 298 : Melosira varians Roggenstorf (Rostock) GDR : Hauck & Richter 298 : Stauroneis phoenicenteron Rohrbach (Leipzig) GDR : Rabenhorst 2522 : Navicula radios a Kützing Rohrbach (Leipzig) GDR : Rabenhorst 2522 : Pinnularia radios a Rabenhorst