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63
1 meget stort. 312, et Par smaa Exenipl., hvoraf 1
ganske lidet, samt 2 større Exempt. 363, 2 Exempl.
Desforuden er den funden ved Novaja-Semlja.
Udmaaling af 3 Exemplarer.
No. 1. Dyrets hele Grjennemsnit. . . 75mm.
Store Radius.......40mm.
Lille do........25mm.
Høiden.........20mm.
No. 2. Dyrets hele Grjennemsnit. . . 55mm.
Store Radius.......30""".
Lille do........20mm.
Høiden.........15""".
No. 3. Dyrets hele Grjennemsnit. . . 28""".
Store Radius......14—15mm.
Lille do.......7—8""".
Høiden.........6mra.
Station No. 286. Two specimens, one, of which, was
very large.
— „ 312. A couple of small specimens, of
which, the one was quite small,
and, also, 2 larger specimens.
— „ 363. Two specimens.
Distribution. It is, otherwise, found at Nova Zembla.
Dimensions of 3 specimens.
No. 1. Total diameter of the starfish 75mm.
Length of brachial radius 40""".
Length of disk radius 25""".
Thickness 20""".
No. 2. Total diameter of the starfish 55""".
Length of brachial radius 30""".
Length of disk radius 20mm.
Thickness lö""".
No. 3. Total diameter of the starfish 28mm.
Length of brachial radius 14—15""".
Length of disk radius 7—8""".
Thickness 6""".
Asterina tumida, varietas tuberculata, nob.
Tab. X, Fig. :.—7. -Tab. XV, Fig. :i.
Legemet 5-straalet. Ryggen temmelig hvælvet. Bugen
flad. Armene længere og smalere, end paa Hovedformen.
Den lille Radius forholder sig til den store som 1:2.
Paa Rygfladen sees foruden Paxillebeklædningen mange
enkeltstaaende, runde Knuder, som staa tættere paa
Armene, end paa Skiven, Tab. X, Fig. 5. 6.
Madreporpladen næsten rund; sidder omtrent midt
imellem Armvinkelen og den subcentrale Anus, dog noget
nærmere den første, Tab. XV, Fig. 3.
Ambulacralfuren har 3 Rækker Pigge, hvoraf en
vender ind mod Furen. I enhver Række er kun 1 Pig, Tab.
X, Fig. 7.
Randen er temmelig udpræget og dannes især af de
ventrale Randplader, der ere meget tydelige; de dorsale
Randplader ere mindre iøjnefaldende, men kunne dog sees.
I Ryggens Hudskelet ere de Kalkplader, der svare til
Knuderne paa Overfladen, meget fortykkede, større i
Omfang og runde (sammenlignet med Hovedformen).
Asterina tumida, varietas tuberculata, nob.
P). X, figs. r>—7. PI. XV, fig. 3.
The body |is 5-rayed. The abactinal surface is arched,
and the actinal surface is flat. The rays are longer and
narrower than those of the normal form. The disk radius
bears to the brachial radius, the proportion of, as, 1 : 2.
Besides the paxillar covering, there is seen, on the
abactinal surface, numerous solitary circular knobs, which,
upon the rays, are placed closer together than on the disk
(Pl. X, figs. 5, 6).
The madreporite is nearly circular, and is situated,
about midway between the brachial angle and the
submes-ial anus, but rather nearer to the first named (Pl. XV,
fig. 3).
The ambulacral furrow has 3 series of spines, of
which, the one series turns in towards the furrow, and
each series consists, of only a single spine (Tab. X, fig. 7).
The margin is well defined, and is especially formed
by the ventro-marginal plates; which appear very
prominently. The dorso-marginal plates do not appear so
prominently, but yet, are visible.
In the abactinal dermal skeleton, the calcareous plates
which correspond with the knobs on the surface, become
much thicker, more circular in form, and larger in
circumference, than those of the normal form.
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