F r r d. 



Manuskriptet tirdennc Afliandling blev levetet fra min Haand allerede i Novemher 1898. oir et helt Aar er 

 saaledes gaaet med til Oversættelse idenne var færdig i Marts 189'..)) og Tryluiing. Heri in;i;i Grunden soges, naar jeg 

 iidce liar iinnnet tåge det tilborlige Hensyn til den :dlernyeste Literatur; en Fortegnelse over den tindes dog liostbiet den 

 alm. Literaturfortegnelse Pag. ItX). 



Hvad angaar Ordningen og Brugen at de syste m a tis lee Tabeller. Iivoraf der tindes en lur liver Genus at de 

 n;)riliske Hydroider, bedes følgende bemerket: 



\'ed Læsning af Tabellen fra, venstre rinder man forst saadanne — ofte losreviie - Ivjendemerkei-. der specielt 

 er af Betydning for Artsbestemmelsen, medens en mere udfyldeiide Beskrivelse af alle Arternes Eiendommeligheder fitules 

 j)aa lioire Side af deres Navne. De Tal. der staar hosfoiet Arternes Navne, henviser til de tilsvarende Numre i Literatur- 

 ftirtegnelsi n bag i Bogen. 



Kristiaiiiit. :;^ili'it Noreiiibcr 189H. 



Kristine Bonnevie. 



P r e f a e e. 



The MS of tids treatise \vas completed in November, 189!^. and thus a wliole year has been tåken uj) with 

 the translating (whieli was finished in Mareh 1899) and tiie printing. This must be iaken as the exjjlanation of the fact 

 tiiat I have not tåken proper notice of tiu' latest liti-i-ature on the sultjeet. A list of this wdl. bowever. be found addeil 

 to the general bibliography, p. 1<»(> 



With regard to the use of the systematic tables. of whicli there is one lor each genns of Scandinavian iiydroids. 

 tlie fuUowing remark may l)e madi-: 



On reading the table, tliere is tirst found, to the left. sneh distinguishing featuies — otten disconneeted — as are 

 of special importance in determining tlie species; while a fuller descriptiou of all the peculiarities of tiie species is found 

 to the rigiit of tlieir names. The figures after the names of tiie species refer to tiie cori'esponding numbers in tlie 

 bil)liogi'ap!iy at the end. 



Kr/sfiaiiia. .?'"' Nor. 18l)f). 



Kristine Bonnevie. 



