vor, og ved Hr. Professor Sven Lovéns Forekommenhed 
fik vi udlaant fra Stockholms Museum to af Originalexem- 
plarerne, hvorved vi overbeviste os om, at vi havde med den 
samme Nøstjerne at gjøre. 
Vi kunne ikke, som Hr. Stuxberg, henføre den til 
Slægten Solaster, fra hvilken den i høi Grad adskiller sig 
ved Hudskelettets Form, ved Interbrachialsystemet og ved 
Odontophoren. 
Nødvendigvis tilhører den den store Familie Asterimidæ 
og 'nærmer sig da temmelig stærkt til Asterina, til hvilken 
vi ville henføre den, ihvorvel den adskiller sig noget fra 
denne ved Hudskelettet, der paa Rygtladen ikke frembyder 
den særegne Anordning af Kalkpladerne, ved store 
Mængde Tentakelporer, der ere udbredte over hele Ryg- 
fladen lige til Randen, saavel paa Armene som paa Ski- 
ven, samt ved de skjulte Randplader og deres Form. 
den 
Legemet er stærkt konvex paa Ryggen, fladt paa Bu- 
gen, har 5 korte, tykke Arme, Tab. XV, Fig. 2. Den 
lille Radius forholder sig til den store som 5—8. 
Ryggens Overflade er beklædt med tætstaaende Pax- 
iller, der næsten have Bægerformen, bredere foroven, sma- 
lere forneden, og dannes af en gjennembrudt Kalksøile, 
paa hvis øverste, frie Ende rager op en Mængde Kalkspid- 
ser, der paa den ydre Rand staar næsten i en Krands, og 
imellem hvilke Spidser sees en yderst tynd, vandklar Mem- . 
bran, der overtrækker hele Paxillen, Tab. XI, Fig. 8. 
Imellem Paxillerne iagttages mangfoldige Tentakelporer, 
der ere udbredte over hele Rygfladen lige til Randen af 
Armene og Interbrachialrummet. 
to} 
Analaabningen subcentral. Madreporpladen, der paa 
smaa Exemplarer er rund, paa det største Exemplar lidt 
aflang, er stillet omtrent midt imellem Anus og Sostjer- 
nens afrundede Rand. 
Ambulaeralfuren er paa Midten bred, smal mod begge 
Ender og forsynet med 2 Rader spikellose Fødder med 
Sugeskive, Tab. X, Fig. 1. Langs Furens Rand er 3 
Rækker Pigge, 2 1 hver Række, af hvilke de 2 inderste, 
Tab. X, Fig. 1, b, ere de længste og tjene til at dække 
Furen, idet de møde de tilsvarende 2 fra den modsatte 
Rand. 
Interbrachialrummene ere trekantede, meget brede 
udad mod Randen, Tab. X, Fig. 2. De ere tæt besatte 
med særegne Paxiller, der ere langstrakte med 6—8 Tak- 
ker. Hele Paxillen er omgiven af Cuticula og Hpithelet, 
kun Takkerne ere blottede, Tab. XI, Fig. 7. 
Randpladerne ere næsten skjulte af den tykke Hud- 
beklædning og kunne først ret sees, naar enten Dyret er 
aabnet fra Ryggen, Huden slaaet tilside og en svag kaus- 
ably, his specimen was a young one of ours. Through the 
kindness of Prof. Sven Lovén, we obtained from Stock- 
holm Museum the loan of two of the original specimens, 
and were able to satisfy ourselves, that it was the same 
starfish with which we had to do. 
We are unable, however, to assign it to the genus 
Solaster, as Dr. Stuxberg has done, because, it differs in 
a marked degree, in the form of the dermal skeleton, the 
interbrachial system, and the odontophore. 
It of necessity, belongs to the large family of Aster- 
mde, and approaches pretty much to Asterina, to which 
we would be disposed to assign it, although it differs some- 
what from that, m its dermal skeleton. This, does not 
present upon the abactinal surface, the peculiar arrange- 
ment of calcareous plates, nor the multitude of tentac- 
ular pores which are distributed on the entire abactinal 
surface, both, upon the rays and the disk, right up to the 
margin, and, further, it differs, in the concealed marginal 
plates, and in their shape. 
The body is strongly convex on the abactinal surface, 
and flat on the actinal surface. It has 5 short thick rays 
(Pl. XV, fig. 2). The disk-radius bears to the brachial 
radius the proportion of, as 5:8. 
The abactinal surface is clad with close-set, almost 
chalice-formed paxille, having a narrow base, but broad 
above. They are formed by a perforated calcareous col- 
umn, on whose superior free extremity, a number of calca- 
reous points project, which on the exterior margin, almost 
assume a wreath form. Between the points, an extremely 
thin, pellucid, membrane is visible, enveloping the whole 
of the paxilla (Pl. XI, fig. 8). Between the paxillæ, very 
numerous tentacular pores are distributed over the entire 
abactinal surface, right up to the margin of the rays and 
the interbrachial space. 
The anal aperture is submesial. The madreporite, in 
small specimens, is circular, but in the largest specimens, 
it is a little oblong, and it is situated about midway bet- 
ween the rays and the rounded margin of the starfish. 
The ambulacral furrow is broad in the middle, and 
narrow towards the extremities. It is furnished with two 
series of spiculæ-free suckers provided with sucking disks 
(Pl. X, fig. 1). Along the margin of the furrow, there are 
three series of spines, containing 2 spines in each series. 
The 2 inmost spines are the longest (Pl. X, fig. 1,6) and 
by meeting with the corresponding 2 spines from the op- 
posite margin, serve to cover the furrow. 
The interbrachial spaces are triangular, and very 
broad outwards, towards the margin (Pl. X, fig. 2). They 
are closely beset with peculiar, elongate paxille, furnished 
with 6—8 aculeæ. The entire paxilla is enveloped by 
cuticle and epithelium, leaving, only, the aculez exposed (PI. 
XML, ike, Øh 
The marginal plates are almost concealed by the 
thick integumental covering, and first, become distinctly vis- 
ible; either when the animal is dissected downwards from 
the dorsal surface and the integument pushed back, and 
: 
