Archive image from page 101 of Danmarks fauna; illustrerede haandbøger over. Danmarks fauna; illustrerede haandbøger over den danske danmarksfaunaill41dans Year: 1907 98 Hydroidernes Inddeling i Slægter, og nogle Forfattere benytter endnu i Hovedsagen dette Princip. Her følges det af Levinsen angivne Princip, hvorefter der i nordiske Farvande kun findes nedenstaaende to Slægter:

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Keywords: 1900, 1907, americana, archive, biodiversity, blc, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, bookyear, dansk_naturhistorisk_forening, drawing, historical, history, illustration, image, k_benhavn_g_e_c_gad, mblwhoi, mblwhoi_library, page, picture, print, reference, vintage