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46
sige Rækker paa hverandre. Tab. IX. Fig. 7, b. De
ventrale Randplader ere flade, næsten lancetformige i
Inter-brachialrummene, Tab. IX, Fig. 7. c, men bliver mindre
og mere ovale paa selve Armen. Tab. IX, Fig. 7, d. 8, a.
Skelettet frembyder ikke noget særdeles forskjelligt
fra det hos Solaster papposus; kun ere
Adambulacralpla-derne forholdsvis større og bære paa deres Rand de
tidligere beskrevne 15—17 Pigge, Tab. IX. Fig. 8, ft. 14,a.b.
Mundpladerne have paa hver konvex Siderand 6—8 smaa
Kalkpigge; paa den inderste, afrundede Rand 5—6 meget
lange, stærke Pigge, der som Tænder rage ind mod
Mund-aabningen, og paa den midterste Del 2 Rader, 4—5 i hver,
temmelig lange, næsten opretstaaende Kalkpigge.
Odontophoren bestaar af 3 Stykker, en nederste,
smalere Del, der er næsten firkantet, Tab. IX, Fig. 7, e, og
en øverste, bredere, mere afrundet Del, der paa Midten er
delt efter Længden, Tab. IX, Fig. 7, /.
Farven er kjødrød med mørkerøde, spredte Pletter
paa Skivens og Armenes Rygflade, medens Bugfladen er
gulhvid.
Findested.
Station 48, 2 Exempl. Ståt. 124. et meget lidet
Exemplar. St. 164, 2 Exempl. St. 195, 2 smaa Exempl.
St. 200, 3 Exempl. St. 251, 1 Exempl. St. 262, 1 lidet
Exempl. St. 336, et lidet Exemplar.
Sammenstille vi nu denne Art med Solaster
papposus, som den vel kommer nærmest, saa ville vi finde, at
den væsentlig adskiller sig fra denne.
Solaster ajfinis har konstant 10 Arme, medens S.
papposus har fra 11—13. Armene ere kortere og staa
længere fra hverandre. Paxillerne ere kortere og staa længere
fra hverandre. Respirationsrørene ere langt færre i Antal,
hvilket især er fremtrædende paa Armene, og ere ikke saa
konisk tilspidsede som paa Sol. papposus. Hver
Adambu-lacralplade bærer 15—17 Pigge, hvoraf de 7 ere de
egentlige Furepapiller, imedens disse hos Sol. papposus ere 4,
sjelden 5. Interbrachialrummene ere temmelig brede og
tæt besatte med Paxiller, hos Sol. papposus ere de smale
og næsten nøgne. Hudskelettet er finere bygget og har
tættere Masker end hos Sol. papposus; de Plader, der kunne
betragtes som dorsale Randplader, ere rudimentære, og
endelig er Odontophoren 3-delt.
each other in close irregular series Pl. IX, fig. 7, 6). The
ventro-marginal plates are flat, and in the interbrachial
space almost lancet-formed (Pl. IX, fig. 7, c), but, upon
the ray itself, they become smaller and more ovate (Pl. IX,
fig. 7. d, 8, a).
The skeleton presents nothing particularly different
from that of Solaster papposus, except, only, that the
adam-bulacral plates are proportionally larger, and carry on their
margin, the previously described double set of spines,
15—17 in each double set (Pl. IX, figs. 8, b. 14, a, b).
The oral plates have 6—8 small calcareous spines on
each convex lateral margin, and, upon their inner rounded
margin, 5-6 very long, strong spines project, like teeth,
inwards, and towards the oral opening, and on the mesial
part of the oral plate, there are 2 series of pretty long,
nearly vertical, calcareous spines, containing 4—5 spines
in each series.
The odontophore consists of 3 pieces, viz. an inferior,
narrowish, and nearly square part, (Pl. IX, fig. 7, e), «and
a superior, broadish, more rounded part, which is divided
lengthwise, in the middle, into two parts (Pl. IX, fig. 7,/).
The colour, is flesh colour with dark red, scattered
patches upon the abactinal surface, whilst, upon the actinal
surface the colour is yellowish-white.
Habitat.
Station No. 48, 2 specimens.
— r 124, 1 very small specimen.
— „ 164, 2 specimens.
— „ 195, 2 small specimens.
— ,. 200, 3 specimens.
— „ 251, 1 specimen.
— ,. 262, 1 small specimen.
— „ 336, 1 small specimen.
If we, now, compare this species with Solaster
papposus, which it, presumably, most resembles, we will find
that it is still, materially, different from that species.
Solaster affinis has invariably 10 rays, whilst Solaster
papposus has from II—13 rays. The rays are also shorter,
and placed at wider intervals from each other. The
pax-illæ are shorter and situated more apart. The tentacular
tubes are much fewer in number, and this is prominently
the case upon the rays; and, neither, are they so
acuminated as in Solaster papposus. Each adambulacral plate
carries 15—17 spines, of which, 7 spines are the genuine
furrow papillæ, whilst, in Solaster papposus, there are only
4 spines, and, very rarely, 5. The interbrachial spaces are
pretty broad, and closely beset with paxillæ, whilst, in
Solaster papposus they are narrow, and nearly bare, The
dermal skeleton is more slender in construction, and has
closer meshes than in Solaster papposus, and the plates,
which may be considered to be dorso-marginal plates, are
rudimentary, and finally, the odontophore is trichotomous.
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