Af den ovenfor beskrevne Asterias Gunnert fandtes 1 
Exemplar, paa hvilket Skiven var noget mindre, Armene 
kortere, deres Rygflade rigere besat med stærkere Pigge, 
og Hudskelettet meget stærkere bygget, saa at Maskenettet 
var tydeligt at se uden nogen Præparation. 
Af denne temmelig udprægede Varietet, der synes at 
være en Overgangsform til Asterzas Lincku, have vi er- 
holdt fra Professor Sven Lovén to mindre Exemplarer fra 
det kariske Hav, og som vare bestemte af Dr. Stuxberg 
som Åsterias Linckii, men hvorfra den dog i væsentlige 
Punkter adskiller sig. 
Fra det naturhistoriske Museum i Kjøbenhavn have vi 
igjennem Dr. Litken faaet udlaant 2 Exemplarer fra Spits- 
bergen, hvilke foreløbig vare signerede Asterias stellionura ; 
ifølge vore sammenlignende Undersøgelser ere de Asterias 
Gunneri. 
Asterias hyperborea, n. sp. 
Tab. III, Fig. 1—7. 
Legemet 5-armet med hvælvet Ryg og flad Bug. Den 
lille Radius forholder sig til den store som 1:6. 
Skiven, 22”"1 Diameter, er hvælvet, 
stumpe, korte Pigge, der ere afvexlende tykke og tynde; 
men alle omgivne af 2 ovenpaa hinanden staaende Krandse 
af tæt grupperede, korsformige Pedicellarier, Fig. 1. Mad- 
reporpladen lille, aflang, flad, sidder 4”” ovenfor, lidt til 
Siden af Armvinkelen. 
rigelig besat med 
Armene ere 55”” lange, ganske lidt indknebne ved 
Grunden, men ere 15”” brede strax nedenfor og aftager 
jævnt i Tykkelse til den spidse Ende. Armenes Rygside 
er konvex, besat med temmelig tætstaaende, tykke, noget 
stumpe, omtrent 1”” høie Pigge, der ere omgivne af 2—3 
ovenpaa hinanden staaende Krandse af korsformede Pedi- 
cellarier, Fig. 1. 3. 4. Henimod Siderne ordne Piggene 
sig 1 regelmæssige Rækker, ligesom de tiltage baade i 
Længde og Tykkelse, Fig. 1. Af disse Rækker ere to 
stærkt fremtrædende, danne egentlig Grændsen imellem Ryg 
og Bug, og kunne betragtes som Randpigge, hvoraf de, der 
sidde i Rækken nærmest Bugfladen, ere dobbelt saa lange 
(12””) som Rygpiggene, have en meget bredere Basis end 
disse, og omgives kun paa den ydre Halvdel af korsformede 
Pedicellarier, Fig. 2. Overalt imellem Piggene ere Rum- 
mene optagne af 1—3 Tentakelporer; ingen Pedicellarier 
findes der. 
10 
Of the above described Asterias gunneri, one speci- 
men was discovered, upon which the disk was somewhat 
less; the rays shorter, and their abactinal surface more 
numerously occupied by strong spines. The dermal skeleton 
was much stronger in construction, so, that without any 
treatment, the reticulation was distinctly visible. 
Of this tolerably marked variety, which appears to 
be a transition-form to Asterias linckii, we have obtained 
from Professor Sven Lorén, two small specimens from the 
Kara Sea, and which were diagnosed as Asterias linckii, 
by Dr. Stuxberg, but from which they differ, however, in 
important points. 
From the Museum of natural history in Copenhagen, 
we have obtained through Dr. Liitken, the loan of 2 spec- 
imens from Spitzbergen, which where provisionally diagnosed 
as Asterzas stellionura. According to our comparative ex- 
amination they are Asterias gunneri. 
Asterias hyperborea, n. sp. 
PL Må, Ag 7, 
The body, is 5 rayed, and has an arched abactinal 
surface, and flat actinal surface. The disk radius bears to 
the brachial radius, the proportion of, as 1:6. 
The"disk is 22”” in diameter, convex, and occupied 
by numerous, short, blunt spines, which occur, alternately, 
stout and slender, and, these, are environed by 2 wreaths 
of closely grouped cruciform pedicellariz, disposed one above 
the other (fig. 1). The madreporite is small, ovate, flat, 
and seated 4”” above, and slightly to the side of the inter- 
brachial angle. 
The rays are 55”” long, quite slightly constricted at 
the origin, and are 15”” in breadth immediately beyond 
the constriction, and thence, taper uniformly to the pointed 
extremity. The abactinal surface of the rays is convex, 
and bedecked, with rather close-set, stout, and somewhat 
blunt ‘spines, about 1”” long; these are encompassed by 
2—3 wreaths of cruciform Pedicellariæ disposed one above 
the other, (figs. 1, 3, 4). Towards the lateral surfaces, 
the spines {become arranged in regular series, and increase, 
also, both in length and thickness (fig. 1). Of these series, 
two are strongly prominent, forming indeed, the margin be- 
tween the abactinal and actinal surfaces; they may be 
considered as marginal spies, of which those seated in 
the series nearest to the ventral surface, are twice as long 
(12””) as the dorsal spines, and posess-a much _ broader 
base than these, and are encompassed, also, only on the 
exterior half, by cruciform pedicellariæ (fig. 2). The inter- 
spaces between the spines, are, everywhere, occupied by 
1—3 tentacular pores; no pedicellariz are visible in this 
situation. 
