83 



Forst etterat jeg havde forsynet mig med en meget 

 lang, 4—5 Alens Stang, til hvis Ende Haaven fast- 

 bandtes, kunde jeg fange den i større Antal; men 

 mange Exemplarer gik endnn saa dyl)t, at det var 

 umulist at naa i dem. 



Foruden paa Filefjeld er den af nu afdode 

 (lartner Moe tåget i Lom, og af Landskahsmaler 

 Skari ved Kongsvold paa Dovrefjeld. I Finmarken 

 er den derimod, saavidt mig bekjendt, aldrig bleven 

 paatrutfet, ligesaalidt som i Lavlandet Syd paa. 

 Denne Phyllopode er saaledes hos os utvivlsomt en 

 ægte «relict» Form, der kun i vore Hoifjelde endnu 

 har fundet de nødvendige Betingelser for sin Exi- 

 stence. 



Udbredning. — Ai^ten blev først fundet i Grøn- 

 land, hvor den synes at være meget almindelig. 

 Senere er den ogsaa observeret i det arktiske Ame- 

 rika, paa Spitsbergen, paa Novaja Semlja og i 

 Sibirien. Den er saaledes en ægte arktisk Form, og 

 i sin Udbredning cireunipolar. 



was limited to a very fev,' specimens. It was only 

 Avhen I had provided myself with a very long rod 

 — 8 or 10 feet long — to the end of which the 

 net was attached, that I was able to capture them 

 in larger numbers; and many of them were still in 

 such deep water, that it was impossible to get 

 at them. 



Besides being found on the Filefjeld, it was 

 found by the late florist, Moe, in the Lom, and 

 by landsca.pe-painter Skari at Kongsvold on the 

 Dovre Mountains. On the other hand, it has never, 

 to my knowledge, been met with in Finmark, nor 

 yet in the south lowlands. This Phyllopod is thus 

 in this country (Norway) a true «relict» form, which 

 has found only on our mountains the conditions 

 necessary for its existence. 



Distribution. — The species was first found in 

 Greenland, where it seems to be very common. It 

 has since been observed in ai'ctic America, on Spitz- 

 bergen, Novaia Zemlia, and in Siberia. It is thus 

 a true arctic form, and circumpolar in its distribution. 



Sectio III. Concliostraca. 



Syti: Fhyllopoda conchiformia. 



Characteristik. — Legemet omgivet af en stor, 

 tveklappet Skal af chitinos Stiiictur og fæstet til 

 samme ved et smalt dorsalt Ligament. Valvlerne 

 bevægelige ved Hjælp af en stærk liukkemuskel og 

 forbundne dorsalt med hinanden uden nogen egentlig 

 Laas. Hovedet bevægeligt og vel sondret fra Krop- 

 pen, gaaende ud i et mere eller mindre fremragende 

 sammentrykt Rostrum. Kroppen ensforniigt seg- 

 menteret og endende med en kort, mere eller min- 

 dre omboiet Haledel, sædvanligvis forsynet i Enden 

 med 2 stærke bevægelige Klor og bærende dorsalt 

 2 jevnsides stillede Bor.ster. De sammensatte Øine 

 nær sammen, undertiden sammensmeltede, og belig- 

 gende i det indre af Hovedet. Det enkle Øie vel 

 udviklet. Begge Par Følere tilstede, Iste Par for- 

 holdsvis smaa, enkle ; 2det Par omdannede til kraf- 

 tige, tvegrenede Svommeorganer. Munddelene nær- 

 mest lignende dem hos Gruppen Anosfraca. Fød- 

 derne af uniform Bygning, pladeformige. Higede, med 

 tydeligt udviklet Coxallap og med Exopoditen delt 

 i en doi'sal og en ventral Lap; det Iste eller de 



Section III. Concliostraca. 



Syn: Phyllopoda conchiformia. 



Characters. — Body surrounded by a large bi- 

 valved shell of chitinoirs structure, to which it is 

 attached by a narrow dorsal ligament. Valves 

 movable by the aid of a strong adductor muscle, 

 and connected dorsally witli one another without 

 having a true liinge. Head movable and well- 

 defined from the trunk, terminating in a more or 

 less prominent, compressed rostrum. Trunk uni- 

 formly segmented, ending in a short, more or less 

 deflexed caudal part, generally provided at the extre- 

 mity with two strong, movable claws, and bearing 

 dorsally 2 juxtaposed bristles. Compound eyes close 

 together, sometimes merged into one another, and 

 situated in the interior of the head. Ocellus well 

 developed. Both pairs of antennæ present, 1st pair 

 comparatively small, simple; 2nd pair transformed 

 into powerful, bi-ramous natatory organs. Oral 

 parts most nearly resembling those in the Anostraca 

 o-roup Legs of uniform structure, lamellar, lobate, 

 with distinctly developed coxal lobe, and with the 

 exopodite divided into a dorsal and a ventral lobe; 



