deres Skeder ere glindsende hvide. Bugen hvid. Fod- 
derne gule. 
Findested. 
Station 315. Et Exemplar. 
Stichaster arcticus, n. sp. 
Tab. VIII. Fig. 1—8. 
En liden, 5-armet Søstjerne med noget hvælvet Ryg, 
men flad Bug. Den lille Diameter forholder sig til den 
store som 1:5. Skivens Diameter er 5,5”". Armenes 
Længde 8””. 
Skivens Ryg er besat med kolleformede Pigge, der staa 
i uregelmæssige Grupper, 6—8 1 hver, og imellem hvilke 
sees Tentakelporer. Analaabningen er subcentral. Mad- 
reporpladen, der sidder lige i en Armvinkel, er liden, rund, 
flad, nedtrykt imellem Piggene og næsten ganske skjult af 
disse, Fig. 2. 
Armenes Rygflade er konvex med en svag Kjøl langs 
Midten og besat ligesom Skiven med lignende” kølleformede 
Pigge, der danne Grupper, omtrent 8 1 hver, Fig. 4. Disse 
Grupper staa i regelmæssige Længderækker fra Skiveran- 
den til Armenes Spids, og imellem dem sees ligesaa regel- 
mæssige Rækker af Tentakelrør. Langs Armenes Rande 
en Række lange, flade, spatelformede Pigge, der staa 2 og 
2 sammen, Fig. 2. 3, å. 5, a, og som skarpt skille Ryg 
fra Bug. Overalt paa Rygfladen er der Pedicellarier, af 
hvilke de korsformede staa i smaa Grupper ved Grunden 
at Piggene; de lige Pedicellarier ere yderst sparsomme, 
meget smaa og staa enkeltvis. 
Bugfladen har en forholdsvis bred Ambulacralfure, der 
er forsynet med 4 Reekker cylindriske Fodder og med 2 
Rekker temmelig lange, noget fladtrykte, divergerende Pa- 
piller, hvoraf de i inderste Række naa neesten til Midten 
af Furen, Fig. 3, 0. 5, b. Imellem den ydre Række af 
Furepapillerne og de tidligere omtalte spatelformede Rand- 
pigge er et smalt? nøgent Belte, Fig. 5, c. Langs Bugfu- 
ren, ved Siden af Ambulaeralpapillerne, sees enkeltstaa- 
ende, yderst faa, ligeformede Pedicellarier, imedens der paa 
Papillernes Ende sees hist og her en tynd Dusk af kors- 
dannede Pedicellarier. 
De ligedannede Pedicellarier ere overordentlig smaa 
«I 
also, the spines, with their accompanying sheaths are lust- 
rous white. The actinal surface is white. The-.suckers 
are yellow. 
Habitat. 
Station 315. — One Specimen. 
Stichaster arcticus, n. sp. 
Pl. VIIT, figs. 1—8. 
A small, 5-rayed starfish, which has a somewhat arched 
abactinal surface, and a flat actinal surface. The disk rad- 
ius, bears to the brachial radius, the proportion, of, as 
1:5. The diameter of the disk is 5.5%", and the length 
of the rays is 8””. 
The abactinal disk is beset with club-shaped spines, 
placed in irregular groups containing 6—8 spines in each group, 
and between which, tentacular pores appear. The anal 
aperture is submesial. The madreporite is situated in an 
interbrachial angle, and is small, circular, flat, depressed 
between the and nearly concealed by these 
(fig. 2). 
The abactinal surface of the rays is convex, with a 
spines, 
slightly raised ridge along the mesial line, and, like the 
disk, it is beset with similar club-shaped spines, situated in 
groups containing about 8 spines in each group (fig. 4). 
These groups are placed in regular longitudinal series, ex- 
tending from the diskal margin to the distal extremity 
of the rays, and regular series of tentacular pores ap- 
pear between them. Along the brachial margins, there 
occurs a series of long, flat, spatulate spines, placed 2 and 
2 together (figs 2, 3,a. 5, a), and these, sharply define the 
margin between the abactinal and actinal surfaces. On 
the whole of the abactinal surface, pedicellariz are visible, 
of which, the cruciform pedicellariæ are placed in small 
groups at the base of the spines, whilst, the rectiform ped- 
icellariz occur extremely sparingly, are very small in size, 
and placed singly. ‘ 
The actinal surface has a proportionately broad am- 
bulaeral furrow, which is furnished with 4 series of eylind- 
rical suckers, and, also, with 2 series of rather long, some- 
what flattened, divergent papillæ, of which, those in the 
inner series, extend nearly to the middle of the furrow (fig. 
3, b. 5, b). Between the outer series of furrow-papillæ 
and the spatulate marginal spines previously spoken of, 
there occurs a bare, narrow, border (fig. 5,0). Along the 
ventral furrow, extremely few rectiform pedicellariæ are 
visible; these occur singly, and are placed at the side of 
the ambulaeral papillæ; whilst, upon the papillar extremit- 
ies, there is, here and there, visible, a thin tuft of cruci- 
form pedieellariæ. 
The rectiform pedicellariæ are extremely small, and 
