143 
ens Lsengcle og at Endekloen er forkoldsvis betydelig stserkere 
forlsenget. 
Hos det levende Dyr er saavel Legemet som Lern- 
merne af en intensiv tagstensrod Farve. Denne Farve 
forsvinder dog meget hurtigt paa de i Spiritus opbevarede 
Exemplarer, hvis Legeme derfor ogsaa bliver mere gjen- 
nemsigtigt, saa at flere af de indre Dele mere eller mmdre 
tvdeligt skinner igjennem Integnmenterne. Sees Legemet 
fra Bugsiden (Fig. 2 b), bemmrkes saaledes med stor Tyde- 
lighed den hele Bixggangliekjaede tilligemed de fra samme 
udgaaende Hovednerver. Som hos Slmgten Ascorhynchus, 
bestaar denne af 5 vel adskilte Ganglier, hvoraf dog de 2 
sidste er forbundne med saa korte Commissure!’, at de 
begge synes at tilhore Kroppens nmstsidste Segment. 
Porekomst. Af denne charaeteristiske Form blev 
under Nordhavs-Expeditionen 7 Exemplarer mdsamlede, 
alle fuldvoxne og nresten af ens Storrelse. Exemplarerne 
toges paa 3 forskjellige, temmelig vidt adskilte Stationer. 
Af disse ligger den Iste (Stat. of) udenfor Storeggen, den 
2den (Stat. 137) i Havet V af Lofoten, og den 3die (Stat. 
312) NV af Beeren Eiland; Dybden fra 417 til 658 Favne. 
Alle 3 Stationer tilhorer den kolde Area. 
Udbredning. Arten er i den nyere Tid observeret 
af forskjellige Naturforskere og paa flere vidt adskilte Loka- 
liteter, saaledes udenfor Nordamerikas Dstkyst (Wilson), 
i Fmr0 — Shetlands-Renden (Hoek) og i det kariske Hav 
(Hansen). Skjondt den ved Nordamerikas Dstkyst ifblge 
Wilson er observeret saa langt Syd som mellem den 38te 
og 40 de Bredegrad, er den dog utvivlsomt, ligesom fore- 
gaaende Art, at anse for en mgte arktisk Form. 
Sill i** <>'- 
Bidrag til Pycnogonideernes Systematik. 
Undei Udarbeidelsen af denne Aflmndling bar det 
mere og mere stillet sig for inig som onskeligt at faa gjort 
et Forsog paa at foretage en mere conseqvent. gjennemfort 
systematisk Inddeling af de talrige liidtil kjendte Pycno- 
gonideer. Da det synes, at alle Forskere for Tiden er 
euige i, at disse Dvr hverken kan henfqres til Orustaceerne 
eller Argchniderne, men maa danne en Classe for sig, 
kan man heller ikke laengere lade sig tioie med at tor- 
dele de forskjellige Slmgter paa forskjellige Familier, men 
maa ogsaa se om muligt at faa. grupperet Familierne 
under stprre Afdelinger, eller Ordener. At et saadant 
Forsog hidtil ikke er gjort, har sin naturlige Grand den, 
2 last joints (see fig. 2 f) are equal in length, and that 
the terminal claw is, relatively, considerably more elon- 
gated. 
In the living animal, the body, as well as the limbs, 
has an intense brick-red colour. This colour disappears, 
however, very rapidly 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. It the 
body is viewed from the ventral side (fig. 2 b) there may 
thus be observed with great distinctness, the entire v-entral 
ganglial chain as well as the chief nerves issuing from 
the same. As in the genus Ascorhynchus, it consists ot 
5, well separated ganglia, of which the 2 last are, how- 
ever, 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 (Stat. 31) lies outside the Storeggen bank, 
the 2nd (Stat. 137) in the ocean W of Lofoten, and the 
3rd (Stat. 312) N, W of Beeren Island; depth from 417 
to 658 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 se- 
parated 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 Ameiica 
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. 
\ 
Appendix. 
Contribution to the systematic Classification of the 
Pycnogonids. 
In the preparation of this Memoir, the desirability 
of making a more logically instituted systematic arrange- 
ment 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, 
I 
