nii'U olU'j' I'll noiaiitij; rmlorsogflsi' at' Leaitlnt fctm(/o)ta's 

 Anatomi' at dømme., tror jeg at kunne antage. at de Dyr. 

 der i ydre Udseende staa de korte Polynoer nærmere end 

 Leanira, i anatomisk Henseende kun ville have yderst 

 ringe om overliovedct nogcn AtVigolse at frembyde, naar 

 selv Leanira, der endog henregnes til en anden Familie, i 

 na^sten alle Henseender i sin anatomiske Bygning viser 

 saa store Overensstemmelser med Folyiioerne. 



Den anatomiske Undersøgelse at' Leaiiira blev netop 

 Ibretagen for at undersoge med hvilken Ret den og Sigalion 

 henførtes til en egen Familie, og Undersøgelsens Resultat 

 blev det. at inan nej)pe nok havde Ret at henføre den til 

 (Ml anden Shegt end Polynoerne. end sige til en anden 

 Familie. Og efter en forelobig Undersogelse a f FaniliaVis 

 Øvxtedi samt efter ieilighedsvise Indblik i Apliroiliie actdeafas 

 og Lætmonice Jilirornis's Bygning skulde jeg være tilboielig 

 til at antage, at samtlige elytrebærende Annelider rettest 

 henføres under en Familie. 



.h'g giver nedenfor en Fortegnelse over de Stationer, 

 paa. hvilke der fangedes Annelider. samt over de Annelider, 

 der ere fundne paa hver af dem tilligemed en Angivelse 

 om Dyrenes ovrige bekjendte Forekomst, idet jeg med 

 Hensyn til denne har holdt mig til 'de Opgivender. der 

 tindes hos 



A. I. Malmgren: Annulnia polychæta. 



P. Tauber: Annulata danka. 



Hj. Théel: Les annélides polychétes des mers 



de la ]^ouvelle-Zemble. 



Som det vil sees af efterstaaeude Fortegnelse er An- 

 tallet af Annelider fra de store Dyb 'Og fra den iskolde 

 Area teml. betydeligt og tindes der blandt dem Repra^sen- 

 tanter fra uæsten samtlige Annelidefamilier. F'or at dette 

 bedre kan oversees, har jeg nedenfor sammenstillet alle de 

 i den iskolde Area fundne Annelider ordnede efter de Fa- 

 milier, de tilhøre. 



Det tør dog vaére hensigtsmæssigst, for jeg meddeler 

 denne Liste og Betragtninger over Annelidernes Udbre- 

 delse iuden det undersøgte Havparti. at give en Beskri- 

 velse af de nye Former, der ere fundne, samt nogle Op- 

 lysninger om andre mindre kjendte Dyr. 



Polynoe globifera, Li. 0. Sårs. 



Denne Form ei' forst fundet paa den ydre Afhæld- 

 ning af den store Fiskebanke udenfor Christiansund af 

 Herr Prof. G. 0. Sårs og af ham beskrevet i Christiania 

 Videnskabsselskabs Forhandlinger 1872. 



Da Prof. Sars's Beskrivelse ikke . er ledsaget af Teg- 

 ninger, meddeler jeg saadanne paa T. II Fig. I — 9. Om 

 Elytrerne er at bemærke, at der paa hvert af dem tindes 



' Arkiv iVir Mathematik og- Naturvidenskalj. 



studying the anatomy oi' Lmi lira fetragona. ' I am disposed 

 to assume, that animals bearing in their habitus a stronger 

 resemblance than '^does Leanira to the Fohpiow, will be 

 found to exhibit very triiling, if- any variation, in their ana- 

 tomical structure, seeing Wi&t Leanira. which is even refer- 

 red to another family, so closely a]i])r().\imates the Polynoæ 

 in its general organisation. 



My object in stutiying the anatomical structure of 

 Leanira, was to learn on what grounds a separate family 

 had been instituted for that animal and SigaJion; but T 

 failed to discover any adequate reason for assigning it 

 generic rank, let alone establishing a new family for its 

 reception. And moreover. I feel disposed to infer from 

 ■a cursory investigation of Paniludis Ømfedi and some 

 acquaintance with the structural features in Aphrodite 

 aadeata and Lætuionice filirornis, that all scale-bearing An- 

 nelids should properly be referred to one family. 



Overleaf will be found a List of the Stations at 

 which Annelids were dredged, with a specitication of the 

 species brought up in each locality; the geograjihical distri- 

 bution elsewhere throughout the seas of the globe has been 

 also given, from statements in the following works: — 



A. I. Malmgren:- Aiiiiuhda poh/chwta. 

 P. Tauber: Anmdatu diuiica. 



Hj. Théel: Les annélides polychétes des mers 



de la Nouvelle-Zemble. 



As will be seen from this List. tJie number of An- 

 nelids obtained from great depths and in the cold area is 

 considerable. Moreover, it comprises representatives from 

 well-nigh every known family ; and I have therefore, with 

 a view to facilitate reference, arranged all. Annelids found 

 in the cold area under the families to which they hidong. 



Meanwhile, it will periiaps be best, before giving the 

 List, along with remarks on the distribution of the An- 

 nelids throughout the tract of ocean investigated, first to 

 describe the new[ forms brought to light on the Expedi- 

 tion, and furnish some information respecting other, com- 

 paratively little known animals. 



x' 



Polynoe globifera, G. O. Sars. ^' ' V^ > 

 .This form was first met with on the outer slope of 

 the great tishing-bank oft' Christiansund, by Professor C O. 

 Sars, who described it in ''Christiania Videuskabsselskabets 

 Forhandlinger," 1872. 



No drawing of the animal being annexed to Professor 

 Sarss diagnosis, I have furnished rejiresentatious in PL II, 

 tigs. 1 — 9. As regards the elytræ, must be observed, that 



Arkiv for Mathematik oir Natu 



itlenskab. 



