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86
ker, der ere forskjellige baade i Antal og Form, alt
eftersom Individet er ældre eller yngre, — ligesom de paa
gamle, store Exemplarer ere forstørstedelen sammenvoxede,
saa at de der virkelig danne en sammenhængende
Kalkplade, der er gjennemboret af 14—16 Huller1.
Ialminde-lighed udgjør Kalkstykkerne fra 16—24 og ere ordnede
saaledes, at de største, der ere dels trekantede, dels
firkantede, ligge i Midten og danne en ujævn Længderække;
til disse Midtstykker slutte sig paa liver Side smalere
Kalkstykker, der ikke slutte ganske tæt til hinanden,
hvorved et Mellemrum eller en Aabning fremkommer, som
tjener til Gjennemgang for Tentakelrør.
Af denne Søstjerne fandtes paa Expeditionen en stor
Mængde saavel i den kolde som varme Area. Det er
en ren arktisk Form og er tidligere ikke funden ved
Norges Kyst sydligere end ved Christiansund, og kun i meget
smaa Exemplarer. I de arktiske Have opnaar den en
overordentlig Størrelse, — saaledes var der enkelte
Exemplarer fra den kolde Area, der maalte indtil 260m™ i
Diameter. Den lille Radius var 23ram, den store 130mm. De
havde en smuk høirød Farve paa Rygsiden, og Paxillerne
bare her altid en stærk Midtpig, saa at Rygfladen havde
et pigget Udseende.
Fra følgende Stationer haves Exemplarer:
Station 9, mange Exemplarer; Svabberne vare saa
overfyldte med denne smukke Søstjerne, at de havde
Udseende af purpurrødt Fløiel, idet de kom op af Søen.
Exemplarerne vare temmelig store. Ståt. 10, ogsaa her i
temmelig stor Mængde, sammen med Astrop. Andromeda.
Ståt. 18, hyppig, meget store Exempl. Ståt. 23, et lidet
Exempl. Ståt. 25, et lidet Exempl. Ståt. 26, enkelte
smaa Exempl. Ståt. 31, nogle store Exempl. Ståt. 33,
mange store Exempl. Ståt. 54, mange store Exempl.
Ståt. 79, enkelte smaa Exempl. Ståt. 87, store Exempl.
Ståt. 92, mange, men meget smaa Exempl. Ståt. 101,
flere smaa Exempl. Ståt. 124, mange, store Exempl.
Ståt. 147, meget smaa Exempl. Ståt. 149, smaa Exempl.
Ståt. 164, to overordentlig store Exemplarer. Ståt. 176,
to store Exempl. Ståt. 223, et overordentlig stort
Exemplar. Ståt. 224, to Kjæmpeexemplarer. Ståt. 225, store
Exempl. Ståt, 248, nogle store Exempl. Ståt. 251, flere
smaa Exempl. Ståt. 255, 2 smaa Exempl. Ståt. 260,
2 store Exempl. Ståt. 262, nogle Exemplarer i
Middelstørrelse. Ståt. 273, ligesaa. Ståt. 275, ligesaa. Ståt.
283, meget almindelig, temmelig store Exemplarer. Ståt.
290, et stort Exemplar. Station 312, uhyre Mængder,
store Exemplarer. Station 323, mange, Middelsexempla-
seen upon closer examination, to consist of small
calcareous pieces, varying, both in form and number, according
as the individual specimen is old or young. In old large
specimens the calcareous pieces have, most of them,
become adherent to each other, so that they really form one
compact calcareous plate, which is pierced by 14—16
perforations1. Usually, the calcareous pieces are 16 to 24
in number; and are arranged in such manner, that the
largest, which are partly, trilateral, and partly, quadrilateral
in shape, are placed in the middle, and form an irregular
longitudinal row. To the lateral margins of these mesial
pieces, narrower calcareous pieces which do not quite close
upon each other, unite, producing an interspace or
leaving an aperture, serving for the passage of tentacular tubes.
A large number of specimens of this starfish was
found during the expedition, both in the cold, as well as,
in the temperate area. It is a pure arctic form, and has
not, previously, been found on the Norwegian coast further
south than Christiansund, and then, only, in the shape of
very small specimens. In the Arctic seas, it reaches to an
immense size, and some specimens from the cold area,
attained as much as 260mm in diameter. The disk radius
was 23mm and the brachial radius 130mm. There colour
was a beautiful scarlet on the abactinal surface; and the
paxillæ in that situation, always carry a strong mesial
spine, so that the abactinal surface obtains a spinous
appearance.
Specimens were obtained at the following stations:
Station No. 9. Many specimens. The hempen-tangles were
so completely filled with this beautiful
starfish, that as they came out of the sea,
they had the appearance of reddish purple
flannel. The specimens were pretty large.
— „10. Also, here, in rather large quantities, in
conjunction with Astropecten Andromeda.
— „18. Frequent, very large specimens.
— „ 23. A small specimen.
— 25. A small specimen.
— ,, 26. A few small specimens.
— „31. Some large specimens.
— „ 33. Many large specimens.
— „ 54. Many large specimens.
— „ 79. A few small specimens.
— „ 87. Large specimens.
— „ 92. Many, but very small specimens.
— „101. Several small specimens.
— „ 124. Many large specimens.
— „ 137. Large specimens.
— „ 147. Very small specimens.
— „ 149. Small specimens.
— „ 164. Two extremely large specimens.
— „ 176. Two large specimens.
— ,, 223. An extremely large specimen.
1 Se Tab. 3, fig. 1, a, a, i Nyt Magazin for Naturvidensk. 23
B., 3die Hefte.
1 Vide PI. 3, fig. 7, a, a, in Nyt Magazin for Naturvidensk.
23 B. 3die Hefte.
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