240 



Articulation med det foregaaende. 3die Led er betydelig 

 kortere og bærer paa Spidsen flere særdeles complicerede 

 Vedhæng, hvoraf nogle er forsynede med Børster, andre 

 med kurte Turner (se Fig. 21). Meget afVigende er dette 

 Fodpar bygget hos Hannen af Euchæta Prestandreæ, hvor 

 Endekluen paa venstre Fod er betydelig længere og fint 

 tilspidset. ligesom Vedhængene i Enden af høire Fod er 

 af et meget forskjelligt (Jdseende. 



Alle de under Expeditionen fra stort Dyb optagne 

 Exemplarer udmærkede sig ved en særdeles intensiv blod- 

 rød Karve, der ogsaa strakte sig til de fleste af Kroppens 

 Vedhæng, med Undtagelse af Halebørsteme, der vare ganske 

 klare og hvis tætte Cilier skiftede i alle Regnbnefarver. 

 Derimod viste nogle mindre Exemplarer. tagne udenfor Stor- 

 eggen nær Vandskorpen med det fine Net. en langt mindre 

 iøinefaldende Farvetegning, idet de som sædvanlig var ganske 

 gjennemsigtige med kun et ganske svagt blegrødi Skjær paa 

 visse Dele af Legemet. Æggene i Æggesækken er. som 

 ovenfor anført, sædvanlig af en vakker blaa Farve. 



Længden af de største under Expeditionen erholdte 

 Exemplarer gaar op til 12""". en for en fri Copepode colossal 

 Størrelse. Den sædvanlig ved vore Kyster forekommende 

 Form opnaar neppe mere end den halve Størrelse. 



Forekomst og Udbredning. Vi har under vor Ex- 

 pedition noteret denne smukke og anselige Copepode fra 

 ikke mindre end 12 forskjellige Stationer. Paa de alter- 

 neste af disse blev Exemplarerne optagne med Trawl eller 

 Bundskrabe fra meget betydelige Dybder, medens Overflade- 

 nettet her. selv om det sænkedes dybt under Vandskorpen 

 ikke bragte et eneste Exemplar op. Det er heraf sikkert, 

 at Arten paa disse Punkter holdt sig i de dybere Vandlag. 

 Nøiagtig at angive, fra hvilken Dybde de er optagne, lader 

 sig dog vanskeligt gjøre; men der er Grrund til at antage, 

 at de stammer fra de under det tempererede Atlanterhavs- 

 vand liggende iskolde, Polarhavet oprindelig tilhørende 

 Vandlag. 



Arten, der. som ovenfor anført, forst er beskrevet som 

 særskilt Art af A. Boeck, og senere af Moebius fra Pom- 

 nieranias Expedition i Nordsøen, forekommer ikke ualmin- 

 delig langs vor hele Kyst. men opnaar her paa langt nær 

 ikke den Udvikling som i Nordhavets store Dyb, hvorfor 

 man er berettiget til at anse den for en hoinordisk Fonn 

 i Modsætning til E. Prestandreæ, der er en sydlig eller 

 Atlanterhavsform. 



of the left leg. and has at the point extending inward a 

 very small, somewhat unguiform appendix, representing the 

 rudimentary inner branch. The next articulation is slightly 

 inspissated in the middle. and very movably connected 

 with the preceding. The 3rd articulation is consider- 

 ably shorter. and bears at the point several exceedingly 

 complicated appendices, some of whicb are furnished with 

 bristles, others with cilia. others again with sliort spines 

 (see fig. 21). This pair of legs deviate very much, as to 

 structure. from the male of Euchæta Prestandreæ, the ter- 

 minal claw on the left leg being in this species considerably 

 longer, and acutely pointed; the appendices, too, at the ex- 

 tremity of the right leg present quite a different appearance. 



All the specimens brought up on the Expedition from 

 a great depth were distinguished by a vivid blood-red 

 hue. also characterizing most of the appendages of the 

 body. save the caudal bristles. whicb were quite pellucid. 

 and whose dense cilia kept constantly shifting in all the 

 tints of the rainbow. On the other hand, a few smaller 

 examples, tåken off the Storeggen Bank. near the surface 

 of the water, in the finemeshed tow-net, bad a far less 

 conspicuous coloration, being as usual quite translucent, 

 with only the faintest reddish tinge over certain parts of 

 the body. The eggs in the ovisac are. as stated above, 

 of a beautiful blue colour. 



The length of the largest specimens obtained on the 

 Expedition reaches 12""". --a colossal size for a free Co- 

 pepod. The form "generally met with off the Norwegian 

 coast attains but little more than half that length. 



Occurrenee and Distribution. — On the Norwegian 

 Expedition we bad to record this beautiful and large-sized 

 Copepod from as many as 12 different Stations. At by 

 far the greater number of these, the specimens were brought 

 up in the trawl or dredge, from very considerable depths, 

 whereas the surface-net, even when sunk in these localities 

 to a depth comparatively great, never succeeded in taking 

 a single example. Henee. it is obvious, that the species 

 hereabouts must inhabit the deeper strata. Meanwhile, to 

 give the precise depth from which the specimens were col- 

 lected, would be a difficult matter; but there is reason to 

 assume as the habitat of the species the ice-cold strata of 

 the Polar curreiit. extending beneath the temperate Atlantic 

 water. 



This form. which, as stated above. was first described 

 speeifically by A. Boeck, and subsequently by Moebius. 

 from the "Pommerania" Expedition in the North Sea. occurs 

 not infrequently along the entire range of the Norwegian 

 coast. though far from attaining there a development com- 

 parable to that it exhibits in the great deeps of the North- 

 ern Ocean; and henee we are warranted in regarding the 

 animal as a high Northern form. in contradistinction to 

 E. Prestandreæ, which is a southern or Atlantic species. 



