314 Dretchen (Dresden) GDR : Rabenhorst 2559 : Pinnularia major Rabenhorst v. crassa Dretchen, see also Bautzen (Dresden) GDR : Rabenhorst 1402 Drewenz, see Toruń (Toruń) Poland : Hauck & Richter 350 Drezdenko (Zielona Góra) Poland : Rabenhorst 188 : Epithemia [sp.] Drezdenko (Zielona Góra) Poland : Rabenhorst 188 : Gomphonema [sp.] Driesen, see Drezdenko (Zielona Góra) Poland : Rabenhorst 188 Drösing (Niederösterreich) Austria : Kneiff & Hartmann 1845 : Cyclotella kuetzingiana W. Smith Drösing (Niederösterreich) Austria : Kneiff & Hartmann 1845 : Cyclotella meneghiniana Drösing (Niederösterreich) Austria : Kneiff & Hartmann 1845 : Melosira varians C. Agardh Drösing (Niederösterreich) Austria : Kneiff & Hartmann 1845 : Synedra ulna Ehrenberg Drusenhorst [?], see Ludwigslust [?] (Schwerin) GDR Dry Tortugas (Florida) US : H.L. Smith 708 : Cocconeis punctatissima Greville Dry Tortugas (Florida) US : H.L. Smith 708 : Cocconeis ramosa J.W. Bailey Duck Creek (Maryland) US : H.L. Smith 691 : Synedra reversa W. Smith Ducher See, Germany, see Ducker See [?] (Neubrandenburg) [?] GDR : H.L. Smith 683 Ehrenberg Duddington Loch (Lothian) Scotland : Van Heurck 90 : Cyclotella comta Ehrenberg v. [unnamed] Duddington Loch (Lothian) Scotland : Van Heurck 90 : Cymatopleura solea Duddington Loch (Lothian) Scotland : Van Heurck 90 : Navicula amphibiaena Duddington Loch (Lothian) Scotland : Van Heurck 90 : Navicula cuspida Duddington Loch (Lothian) Scotland : Van Heurck 90 : Navicula radiosa Duddington Loch (Lothian) Scotland : Van Heurck 90 : Navicula rhynchocephala Kützing Duddington Loch (Lothian) Scotland : Van Heurck 90 : Navicula viridis slesvicensis Grunow Duddington Loch (Lothian) Scotland : Van Heurck 90 : Pleurosigma acuminatum (Kützing) Grunow Duddington Loch (Lothian) Scotland : Van Heurck 284 : Gomphonema constrictum Duddington Loch (Lothian) Scotland : Van Heurck 284 : Navicula globiceps v. [unnamed] Duddington Loch (Lothian) Scotland : Van Heurck 284 : Navicula inflata Duddington Loch (Lothian) Scotland : Van Heurck 284 : Navicula lepida Duddington Loch (Lothian) Scotland : Van Heurck 284 : Synedra oxyrhynchus Kützing Duddington Loch (Lothian) Scotland : Van Heurck 284 : Synedra ulna Ehrenberg v. genuina Duddington Loch, see Duddington Loch : Van Heurck 90 Duluth (Minnesota) US : Tilden 525 : Achnanthes minutissima Kützing Duluth (Minnesota) US : Tilden 525 : Cocconeis placentula Ehrenberg Duluth (Minnesota) US : Tilden 525 : Gomphonema angustatum Kützing Duluth (Minnesota) US : Tilden 527 : Epithemia gibba Kützing Duluth (Minnesota) US : Tilden 527 : Fragilaria virescens Ralfs Duluth (Minnesota) US : Tilden 527 : Gomphonema acuminatum Ehrenberg Duluth (Minnesota) US : Tilden 527 : Lysigonium varians (C. Agardh) De Toni Duluth (Minnesota) US : Tilden 527 : Melosira varians C. Agardh Duluth (Minnesota) US : Tilden 527 : Synedra ulna P.A.C.N. [?] Duluth (Minnesota) US : Tilden 528 : Cyclotella operculata Kützing Duluth (Minnesota) US : Tilden 528 : Navicula cryptocephala Kützing Duluth (Minnesota) US : Tilden 528 : Navicula viridis Kützing Duluth (Minnesota) US : Tilden 528 : Synedra ulna P.A.C.N. [?] Duluth (Minnesota) US : Tilden 528 : Tabellaria flocculosa Kützing Duluth, see also Fond du Lac (Minnesota) US : Tilden 524 Dumfries & Galloway) Scotland : see Crofthead Dundee (Tayside) Scotland : H.L. Smith 252 : Cocconeis boeckii (Ehrenberg) Kützing Dundee Tayside Scotland : H.L. Smith 252 : Navicula boeckii Ehrenberg Dundee Tayside Scotland : H.L. Smith 651 : Amphora lineata Gregory Dundee Tayside Scotland : H.L. Smith 651 : Druridgea compressa Donkin Dundee Tayside Scotland : H.L. Smith 651 : Druridgea geminata Dundee Tayside Scotland : H.L. Smith 651 : Podosira compressa Dundee Tayside Scotland : H.L. Smith 668 : Gomphonema marinum W. Smith Dundee Tayside Scotland : H.L. Smith 672 : Grammonema striatulum Agardh Dundee Tayside Scotland : H.L. Smith 675 : Licmophora flabellata W. Smith Dundee Tayside Scotland : H.L. Smith 695 : Pleurosigma pulchrum Grunow Dundee Tayside Scotland : H.L. Smith 699 : Rhipidopora paradoxa Ehrenberg Dundee Tayside Scotland : H.L. Smith 700 : Navicula amphibiaena Dundee Tayside Scotland : H.L. Smith 700 : Surirella ovalis v. [unnamed] Dundee Tayside Scotland : H.L. Smith 700 : Surirella pyriformis Kitton Dundee Tayside Scotland : H.L. Smith 740 : Navicula rectangulata Gregory Dunnet (Highland) Scotland : Van Heurck 256 : Nitzschia gibba Kützing Dürenberg, see Bad Dürrenberg (Halle) GDR : Rabenhorst 605, 2523