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Text Appearing After Image:Fig. 31. A and B, Nostoc Linckia Bornet;A, nat. size; B, small portion of thallus,x 340. C, N. co-rule tint Lyngbye, nat. size. Fig. 32. A-D, Anabæna inæqualis (Kütz.) Born. & Flah. E-G, Cylindrospermum stagnale (Kütz.) Born. & Flah. H, Nodularia sphærocarpa Born & Flah. (All × 480.) h, heterocyst; sp, resting-spore. 44 Myxophycese Reproduction takes place by hormogones and by resting-spores. The latter arevariable in shape, and may be solitary or seriate. In Cylindrospermum the spore arisesfrom the cell next the terminal heterocyst (fig. 32 E—G). About half the species ofNostoc and Cylindrospermum occur in subaerial habitats, but all the other members ofthe family are aquatic. Species of Nodularia are mostly brackish-water forms. Fam. Scytonemaceae. The Algae of this family are distinguished by their peculiartype of branching. As a rule there is only one trichome within a strong tubular sheathof regular thickness. The false branches arise either singly or in pai
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Ta slika je vzeta iz Flickrove zbirke The Commons. Organizacija, ki jo je naložila tja, je pri tem uporabila oznako brez znanih avtorskopravnih omejitev, saj zanjo velja ena ali več od naslednjih možnosti:
Gradivo je v javni domeni, ker so avtorske pravice na njem potekle;
Gradivo je prišlo v javno domeno iz drugega razloga, npr. zaradi neupoštevanja zahtevanih formalnosti ali pogojev;
Organizacija je imetnik avtorskih pravic, vendar ne namerava vršiti nadzora;
Organizacija ima zadostne pravne pravice, da lahko uporabnike pooblašča za uporabo dela brez omejitev.
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To delo je v javni domeni tudi v državah in na območjih, kjer trajajo avtorske pravice za časa avtorjevega življenja in še 100 let ali manj po tem.
Delo je v Združenih državah Amerike v javni domeni, saj je bilo objavljeno (ali registrirano pri Uradu za avtorske pravice ZDA) pred 1. januarjem 1929.