nemlig paa den Rand, der vender indad mod Ambulacral- 
furen, og som hviler paa de egentlige Ventralplader, Fig. 2, b. 
Udenfor denne Række findes de dorsale Randplader, Fig. 2, c, 
der ere noget større og korsformede; den indre Arm af 
Korset lægger sig paa den ydre Arm af en tilsvarende 
ventral Randplade. Enhver af disse Plader bærer en stærk 
Pig, der tidligere er beskreven. 
Bugfladens Hudskelet bestaar kun af en eneste Længde- 
rekke Plader, Fig. 2,0. Disse ligge med deres afrundede 
Ender taglagte paa hverandre, ere langstrakte, smale, næ- 
sten elliptiske med en undre (ydre) Flade, der er lidt kon- 
vex, og som støtter de ventrale Randplader, og en øvre (in- 
dre) Flade, der er lidt konkav, og som hviler paa den un- 
dre, runde Rand af Adambulaeralpladerne. Denne Række 
af Bugplader strækker sig fra Armens Spids lige op i Arm- 
vinkelen, hvor Randpladerne fra 2 Arme støde sammen; 
thi andre Bugplader, hvormed de kunne forene sig, saale- 
des som Tilfældet er hos Asterias rubens, Forbesti, vulgaris 
og mange Andre, findes ikke. Paa yderst faa af disse 
Bugplader (2—3 i den hele Række) fæster der sig en tem- 
melig lang Pig, som tidligere er omtalt. 
Skelettet, Ambulacral- og Adambulaeralpladerne, frem- 
byde intet særegent. Adambulacralpladerne bære afvex- 
lende 1 og 2 Pigge, hvilke ere stillede saaledes, at Piggen 
paa den Adambulacralplade, der kun bærer en saadan, staar 
ligeoverfor Insertionen af de to Pigge paa hver af de til- 
stødende to Adambulacralplader, hvorved det faar et Ud- 
seende, som om der er 3 Rækker Ambulacralpapiller. Det 
sande Forhold kommer først frem ved at isolere Adambu- 
lacralpladerne. Et saadant Forhold findes ogsaa hos Aste- 
vias rubens og Forbesti, imedens det ikke finder Sted hos 
Asterias vulgaris. 
_ Farve. Ryggen teglstensrød med hvide Pedicellarie- 
krandse omkring Piggene. Bugen hvid. 
Findested. 
Station 280, Beeren Hiland. 
Artskarakter. 
Legemet 5-armet. 
store Radius som 1: 6. 
Forholdet imellem den lille og 
Ryggen besat med korte, tykke, 
tætstaaende Pigge, omgivne med 2—3 ovenpaa hinanden 
staaende korsformede Pedicellarier. Paa Armenes Midte 
og paa deres Sider staa Piggene i regelmæssige Rækker. 
Imellem Piggene 1—3 Tentakelporer i den nøgne Hud. 2 
Rader Ambulacralpapiller. Farven teglstensrød. 
De to beskrevne Søstjerner, nemlig Aster. spitsbergensis 
og Aster. hyperborea, have vi henfort til den paa Arter saa 
overordentlig rige Slegt Asterias, omendskjønt de, baade i 
hvad ydre Habitus angaar og Hudskelettets Bygning, nærme 
12 
nearest the ventro-marginal plates (fig. 2, a), are not quite 
cruciform, in as much as, that they want an arm on the 
margin which faces inwards towards the ambulacral furrow 
and rests on the ventral plate proper (fig. 2, b). Outside 
this series, the dorso-marginal plates occur; (fig. 2, co) 
they are cruciform, and somewhat larger, and the inner 
arm of the cross, overlaps the outer arm of a corresponding 
ventro-marginal plate. Hach of these plates carries a 
strong spine, which has been already described. 
The ventro-dermal skeleton consists, of, only, one single 
longitudinal series of plates (fig. 2, b). These lie with 
their rounded extremities onerlapping each other, and are 
narrow, elongate, almost elliptic in form, with a slightly 
convex, inferior (outer) surface, which supports the ventro- 
marginal plate, and with a slightly concave, superior (in- 
ner) surface, resting on the inner circular margin of the 
adambulacral plates. This series of ventral plates, extends 
from the extremities of the rays close up to the inter- 
brachial «angle, where the marginal plates of two rays meet; 
because, there are no other plates found, with which they 
could unite themselves, as is the case in Asterzas rubens, 
Asterias forbes, Asterias vulgaris, and many others. On 
extremely few of these ventral plates, (2—3 in the whole 
series) a somewhat long spine which has been already spoken 
of, is found attached. 
The and ambulacral and adambulacral 
plates, present nothing worthy of note. The adambulacral 
plates carry falternately, 1 and 2 spines, so situated, that 
the spine on the adambulacral plate which only carries 
skeleton, 
one, is situate opposite the insertion af the two spines on 
each of the adjoining two adambulacral plates; which gives 
an appearance, as if there were 3 series of ambulacral pa- 
pillæ: the real state of the case becomes first apparent, on 
isolating the adambulacral plates. 
The same thing occurs in Asterzas rubens, and Asterzas 
forbes, whilst. it does not occur in Asterias vulgaris. 
Colour. — The abactinal surface is brick-red, with 
white wreaths of pedicellariæ around the spines. The 
actinal surface is white. 
Habitat, 
Bear, or Cherry Island. Station 280. 
Specific character. 
5 rayed starfish: the proportion between the disk-ra- 
dius and the brachial radius, is, as 1:6. The dorsal disk 
is occupied by closely set, short, stout spines, environed by 
2—3 wreaths of cruciform pedicellariæ, placed the one 
above the other. Upon the rays, regularly formed, mesial, 
and lateral, series of spines. In the bare integument be- 
tween the spines, 1—3 tentacular pores are found. 2 series 
of ambulacral papille. Colour, brick-red. 
We have assigned the two starfishes Asterias spitsber- 
gensis and Asterias hyperborea which have now been de- 
scribed, to the genus Asterias, already so rich in species, 
although, both in regard to external habit, and construction 
