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143
ens Længde og at Endekloen er forholdsvis betydelig stærkere
forlænget.
Hos det levende Dyr er saavel Legemet som
Lemmerne af en intensiv tagstensrod Farve. Denne Farve
forsvinder dog meget hurtigt paa de i Spiritus opbevarede
Exemplarer, hvis Legeme derfor ogsaa bliver mere
gjennemsigtigt, saa at flere af de indre Dele mere eller mindre
tydeligt skinner igjennem Integumenterne. Sees Legemet
fra Bugsiden (Fig. 2 b), bemærkes saaledes med stor
Tydelighed den hele Buggangliekjæde tilligemed de fra samme
udgaaende Hovednerver. Som hos Slægten Ascorhynchus,
bestaar denne af 5 vel adskilte Ganglier, hvoraf dog de 2
sidste er forbundne med saa korte Gommissurer, at de
begge synes at tilhore Kroppens næstsidste Segment.
Forekomst. Af denne charaeteristiske Form blev
under Nordhavs-Expeditionen 7 Exemplarer indsamlede,
alle fuldvoxne og næsten af ens Størrelse. Exemplarerne
toges paa 3.forskjellige, temmelig vidt adskilte Stationer.
Af disse ligger den lste (Ståt. 31) udenfor Storeggen, den
2den (Ståt. 137) i Havet V af Lofoten, og den 3die (Ståt.
312) NV af Beeren Eiland; Dybden fra 417 til (558 Favne.
Alle 3 Stationer tilhører den kolde Area.
Udbredning. Arten er i den nyere Tid observeret
af forskjellige Naturforskere og paa flere vidt adskilte
Lokaliteter, saaledes udenfor Nordamerikas Østkyst (Wilson),
i Færø—Shetlands-Renden (Hoek) og i det kariske Hav
(Hansen). Skjøndt den ved Nordamerikas Østkyst ifolge
Wilson er observeret saa langt Syd som mellem den 3Ste
og 4Ude Bredegrad, er den dog utvivlsomt, ligesom
foregaaende Art, at anse for en ægte arktisk Form.
2 last joints (see flg. 2 f) are equal in length, and that
the terminal claw is, relatively, considerably more
elongated.
In the living animal, the body, as well as the limbs,
has an intense brick-red colour. This colour disappears,
however, very rapidly k in the specimens preserved in
alcohol, their bodies therefore become more transparent,
so that several of the internal organs appear more or
less distinctly visible through the integuments. If the
body is viewed from the ventral side (fig. 2 b) there may
thus be observed with great distinctness, the entire ventral
ganglial chain as well as the chief nerves issuing from
the same. As in the genus Ascorhynchus, it consists of
5, well separated ganglia, of which the 2 last are,
however, connected by so short commissures that they both
appear to pertain to the penultimate segment of the
trunk.
Occurrence. Of this characteristic form 7 specimens
were collected during the North Atlantic Expedition, all
fully grown and nearly equal in size. The specimens were
taken at 3 different, pretty widely separated stations. Of
these the 1st (Ståt. 31) lies outside the Storeggen bank,
the 2nd (Ståt 1371 in the ocean W of Lofoten, and the
3rd (Ståt. 312) N, W of Beeren Island; depth from 417
to (J58 fathoms. All 3 stations pertain to the cold area.
Distribution. The species has, in later times, been
observed by several naturalists and in several well
separated localities; thus, off the East Coast of North America
(Wilson), in the Faroe^Shetland Channel (Hoek) and in
the Kara Sea (Hansen). Although it has been, according
to Wilson, observed on the East Coast of North America
as far south as between the 38th and 40th parallels of
latitude; it must yet, indubitably, like the preceding species,
be regarded as a genuine Arctic form.
Tillæg.
Bidrag til Pycnogonideernes Systematik.
Undei Udarbeidelsen af denne Afhandling har det
mere og mere stillet sig for mig som ønskeligt at faa gjort
et Forsøg paa at foretage en mere conseqvent gjennemført
systematisk Inddeling af de talrige hidtil kjendte
Pycno-gonideer. Da det synes, at alle Forskere for Tiden er
enige i, at disse Dyr hverken kan henføres til Crustaceerne
eller Arachniderne, men maa danne en Classe for sig,
kan man heller ikke længere lade sig nøie med at
fordele de forskjellige Slægter paa forskjellige Familier, men
maa ogsaa se om muligt at faa grupperet Familierne
under større Afdelinger, eller Ordener At et saadant
Forsøg hidtil ikke er gjort, har sin naturlige Grund deri,
.V ppendix.
Contribution to the systematic piassification of the
Pycnogonids.
In the preparation of this Memoir, the desirability
of making a more logically instituted systematic
arrangement of the numerous, hitherto known Pycnogonids, has
obtruded itself more and more strongly upon me. As it
appears that all naturalists are at present unanimous in
considering that those animals can neither be referred to
the Crustaceans nor the Arachnideans, but must form a
class by themselves, we cannot, either, be satisfied longer
with distributing the different genera over different families,
but must also endeavour, if possible, to group the families
in larger divisions, or orders. That such an attempt has
not been made, hitherto, arises, naturally, from the fact,
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