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47
Artskarakter.
Forholdet imellem den lille og store Radius som
1:2’/4-Skiven bred med 10 korte, vidtstaaende Arme. Paxillerne
paa Skivens og Armenes Ryg korte og staa langt fra
hverandre. Respirationsrørene paa Armene er fra 1 —3 i hvert
Interpaxillarfelt. Piggene langs Ambulacralfuren udgaa
7, samlede fra hver Adambulacralplade.
Interbrachialrum-mene brede, tæt besatte meel Paxiller. Farven kjødrød
med mørkerøde, spredte Pletter paa Rygfladen; Bugen
gulhvid.
Specific Character.
The proportion between the disk radius and the brachial
radius is, as 1:2’/4. The disk is broad; with 10 short rays
placed wide apart. The paxillæ on the abactinal
surface of the disk and rays are short, and placed wide apart.
Upon the rays, and situated in each interpaxillar area,
there are 1—3 tentacular tubes. The spines along the
margins of the ambulacral furrow, proceed in sets of 7,
from the margin of each adambulacral plate. The
inter-brachial spaces are broad, and, closely, beset with paxillæ.
The colour is flesh-red, with dark red scattered patches,
on the abactinal surface; and on the actina.1 surface, the
colour is yellowish-white.
Solaster furcifer, Düben & Koren.
Tab. VIII, Fig. 12. Tab. IX, Fig. !>— l(i.
1844. Solaster furcifer, Düben & Koren. Kungl. Vetensk.
Akad. Forhandlingar 1844, pag. 243, pl. VI,
fig. 7—10.
1862. Solaster furcifer, Dujardin & Hupé. Hist. Nat.
Zooph. Echinodermes.
1873. Solaster furcifer, Wyville Thomson. The depths
of the Sea, pag. 119.
1878. Lophaster furcifer, Verrill. Amer. Journ. Sc. &
Arts, Ser. 3, Vol. XVI, pag. 214.
1878. Solaster furcifer, Stuxberg. Echinodermer från
Novaja Semlja’s Haf. Öfversigt af K. Vet. Akad.
Forhandlingar 1878, No. 3, pag. 33.
1881. Lophaster furcifer, Duncan <fe Sladen. A Memoir
on the Echinodermata of the Arctic Sea to the
West of Greenland, pag. 43, pl. III, fig. 9—12.
Af denne Søstjerne blev der fundet paa Expeditionen
nogle Exemplarer, hvoraf de fra den kolde Area og det
store Dyb havde en overordentlig Størrelse. Det fremgaar
heraf, at dens egentlige Hjem er de arktiske Have.
Da Hudskelettet ikke tidligere hverken har været
afbildet eller nøiagtigt beskrevet, ihvorvel Professor Verrill
har lagt dette til Grund for Dannelsen af en ny Slægt,
hvorom vi senere hen skulle tale, saa ville vi nu nærmere
omtale det.
Ryggens Hudskelet er paa Skiven dannet af flade,
paa den indvendige Side lidt hvælvede, stjerneformige
Kalkplader med 5—6 Udløbere, der, idet de forene sig med
til-grændsende Pladers Udløbere, danne et Slags Net med
smaa, mere eller mindre runde Masker, Tab. IX, Fig. 9, a.
Paa Armene bestaar Hudskelettet af tættere Kalknet med
smaa, rudeformige Masker, der dannes af Kalkplader,
Solaster furcifer, Düben & Koren.
PI. VIII. fig. 12. Pl. IX, figs. 0—11.
1844. Solaster furcifer, Düben «fe Koren. Kungl. Vetensk.
Akad. Forhandlingar 1844, pag. 243, pl. VI,
fig. 7—10.
1862. Solaster furcifer, Dujardin & Hupé. Hist. Nat.
Zooph. Echinodermes.
1873. Solaster furcifer, Wyville Thomson. The depths
of the Sea, pag. 119.
1878. Lophaster furcifer, Verrill. Amer. Journ. Sc. <fe
Arts, Ser. 3, Vol. XVI, pag. 214.
1878. Solaster furcifer, Stuxberg. Echinodermer från
Novaja Semlja’s Haf. Öfversigt af K. Vet. Akad.
Forhandlingar 1878, No. 3, pag. 33.
1881. Lophaster furcifer, Duncan «fe Sladen. A Memoir
on the Echinodermata of the Arctic Sea to the
West of Greenland, pag. 43, pl. m, fig. 9—12.
During the expedition, there were found a few
specimens of this starfish, of which, those found in the cold
area, or at great depths, were extremely large. Jt would
appear from this, that its proper habitat is in the Arctic
seas.
As the dermal skeleton has, hitherto, neither been
illustrated nor described, notwithstanding, that Prof. Verrill
has adopted it as the basal feature in the formation of a
new genus, regarding which we shall subsequently speak,
we shall discuss it here a little more fully.
Upon the disk, the abactinal dermal skeleton is formed
of flat, asteriated, calcareous plates, which are slightly
convex on the exterior surface, and have 5—6 projections,
which, by uniting with the projections of the adjacent
plates, form a kind of reticulation, with small, more or less
circular meshes (Pl. IX, fig. 9, a). Upon the rays, the
dermal skeleton consists of a closer calcareous reticulation,
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