37 



145. Themisto libellula. (Mandt ). 



Gang viser si 



Denne arktiske Form, der kun en og anden sjelden 

 red Finmarkens Kyster, observeredes under 

 Expeditionens 2 sidste Togter paa mange Steder i det 

 arktiske Hav. i talrig Mamgde saavel i Vandskorpen som 

 paa meget betydelige Dyb, lige iudtil 1710 Favne. Exem- 

 plarer fra de store Dyb er af særdeles betydelig Størrelse 

 sammenlignet med dem. der erholdtes i Vandskorpen, hvilke 

 væsentlig syntes at være yngre Individer. At virkelig hine 

 store, ved Hjælp al' Trawl og Bundskrabe indfangede Ex- 

 emplarer stammede fra Dybet, godtgjøres ved det Faktum, 

 at Maveindholdet hos forskjellige fra dette Dyb optagne 

 Bundtiske. f. Ex. Lycodesarter ifølge Rob. Colletts Under- 

 søgelser for en meget væsentlig Del bestod af denne Ani- 

 phipode. Den sydligste Station, hvor denne Form obser- 

 veredes (St. 96) ligger under 66" X. B. Hei- og paa et 

 Par af de følgende Stationer (Stat. 183 og 205) erholdtes 

 den kun fra Dybet; medens Havet hengere Nord, omkring 

 Jan Mayen, Beeren Eiland og Spitsbergen ofte vrimlede 

 i Overfladen af denne Amphipode. Arten er udbredt til 

 Grønland, det sibiriske Ishav og den murmanské Kyst. 



146. Themisto bispinosus, Boeck. 



Et enkelt Exemplar af denne af Boeck fra. Grønland 

 beskrevne Art erholdtes i Havet udenfor vor Vestkyst (St. 

 35) fra et Dyb af 1081 Favne. 



147. Parathemisto abyssorum. Boeck. 



Foruden i Altenfjord (Stat. 257) er denne Form under 

 Expeditionen bleven indsamlet paa 5 Hav-Stationer, alle 

 tilhørende den kolde Area. Samtlige Exemplarer blev op- 

 tagne ved Hjælp at Skrabe eller Trawl tildels fra meget 

 betydelige Dyb. Af disse Stationer ligger 2 (Stat. 35 og 

 40) i Havet N og af Færøerne, en 3die (Stat. 137) SV 

 af Lofoten, en 4de (Stat. 183) i Havet mellem Norge og 

 Jan Mayen og en 5te (Stat. 237) SV af sidstnævnte 0; 

 Dybden fra 263 til 1710 Favne. Arten er forst opdaget 

 ved de hritiske Øer (= Hy feria obl/via, Sp. Bate, non 

 Kroyer) og forekommer meget almindeligt paa større Dyb 

 langs vor hele Kyst lige til Vadsø. 



145. Themisto libellula, (Mandt.). 



This Arctic form. of rare occurrence off' the Finmark 

 coast, was observed throughout the Arctic Seas on the 2 last 

 cruises of the Expedition. in great uumbers, botb at the 

 surface of the water and also at a great depth. reaching 

 1710 fathoms. Specimens obtained from great depthsattain 

 a veiv considerable size as compared with those tåken at 

 the surface of the water, which in greater part yvould appear 

 to be young individuals. That the aforesaid large examples, 

 brought up in the trawl or dredge, actually ca me from the 

 deep strata, is proved by the fact, that in several bottom- 

 fishes, e. g. various species of Lycodes tåken at an equal 

 depth, the contents of the stomach, according to Mr. Robert 

 Colletfs investigations, consisted to a great extent of this 

 Amphipod. The most southerly Station at which the form 

 occurred (Stat. 96), lav in lat. 66" N. Here, as also at 

 one or two of the nexl Stations (Stats, is:; and 205), the 

 animal was obtained from the deep strata onlv. whereas, 

 farther north, the surface of the sea surrounding .Tan Mayen. 

 Beeren Eiland, and Spitzbergen in places literally swarmed 

 with this Amphipod. The species is distributed as far north 

 as Greenland, the Siberian Polar Sea, and theMurman coast. 



146. Themisto bispinosus. Boeck. 



A sole individual of this species, described by Boeck 

 from Greenland, was tåken in the sea off the West Coast 

 of Norway (Stat. :)."i). at a depth of 1081 fathoms. 



147. Parathemisto abyssorum, Boeck. 



Apart from Altenfjord (Stat. 257 1, this form was 

 collected on the Expedition at 5 Stations in the open sea. 

 all belonging to the cold area. The specimens were brought 

 up exelusively with the dredge or trawl. in some cases from 

 a very considerable depth. Of the said Stations. 2 (Stats. 

 35 and 40) lay in the tract of ocean north and east of 

 the Færoes, the next (Stat. 137) south-west of Lofoten, 

 the 4th (Stat. 183) in the tract of ocean between Norway 

 and Jan Mayen, and the ~> 1 1 1 (Stat. 237) south-west of the 

 latter island; depth ranging from 263 to 1710 fathoms. 

 The species was discovered off the British Islands = Hi/peria 

 oblivia, Sp. Bate. non Kroyer), and occurs. very frequently, 

 ai great depths, along the whole coast of Norway, as far 

 as Vadsø. 



