115 
De 3 folgende Par (Fig. 21) forestiller aegte Respira- 
tionsorganer og bar derfor Endepladerne stserkt udviklede, 
elliptiske og af membranes Struktur, uden tydelige lland- 
erster. Begge Plader er omtrent af ens Storrelse; men 
den ydre er ved en tydelig Tvmrsutur delt i 2 Segmenter, 
kortere basalt og et hengere terminalt, naesten af lancet- 
dannet Form. 
De klapformige Halevedhseng (se Fig. 2 og 17) er af 
dgnende Bygning som lios Arcturus og ligeledes ved 
^nden forsynede med 2 tilspidsede Grene eller Plader, 
n °rat dog den ene er smrdeles liden og fuldstfendig dsekket 
af den anden (se Fig. 23). 
Hannerne skiller sig lain lidet i sit Ydre fra Hunnerne. 
I Folernes Bygning er heller ikke nogen vmsentlig 
^orsk'.jol at bemserke. 
De ydre Kjonsvedhseng udgaar (se Fig. 17) som hos 
icturus fra Veil tralsiden af lste Bagkropssegment imellem 
f °d en al de tilsvarende Buglemmer. De danner (Fig. 18) 
korte, koniske. noget indboiode og i Midten sammensto- 
c Gnde Fortsatser, paa hvis stumpt tilrundede Elide Aab- 
n mgen lor vas deferens er beliggende. 
Af Bagkroppens Buglemmer er 2det Par (Fig. 21) 
^endonuueligt modificeret, idet der til Basis af den indre 
ade er fVestot et saerdeles langt og smalt, stiletformigt 
I'dlueng, der nsesten rsekker til Spidsen af Endesegmentet 
<>0 i normal Tilstand ligger tret op mod det tilsvarende 
paa den anden Side (se Fig. 17). 
Legemots Farve er hos begge Kjon eusformig skidden 
bia L (lig ! omtrent som det Mudder, hvori Dyret fierdes. Af 
^ ngtni tydelige Pigmentafleiringer var intetsomhelst Spor at 
1 ’Qferke paa de nylig indfangede Exemplarer. 
Lsengden af de storste Exemplarer gaar op til 50™’", 
den staar saaledes neppe tilbage for 01. Sabini i Storrelse. 
Forekomst og Udbredning. Exemplarer af denne Art 
er tagm ■ 
:le Area, Dybden fra 1081 til 1710 Favne. 
Dens for Tiden bekjente Udbredningsfelt er herefter 
611 c b'5e Havdal mellem Norge, Beeren Eiland og Spits- 
k ll* 1 ^* 10 ^ aa ® forskjellige Stationer, alle tilhorende den 
j eigen paa den ene Side, og Island, Jan Mayen og Gron- 
j lll( l P aa den anden, fra den 63de til den 78de Bredegrad 
den ostlige Del af Isliavet syncs den derimod ikke 
to rekomme 
Sabi/, 
som 
at 
Her representeres den af den nmrstaaende 01. 
I?n ** som efter Stuxberg her er overordentlig talrig og 
°gsaa under vor Expedition blev taget i et enkelt Ex- 
m plar i Havet mellem Beeren Eiland og Novaja Semlja. 
The 3 succeeding pairs (fig. 21) represent true res- 
piratory organs, and have, therefore, the terminal plates 
very fully developed, of an elliptic form and membranous 
structure, withount ay distinctly obvious marginal bristles. 
Both plates are well-nigh uniform in size; but the outer is 
divided by a distinct transverse suture into 2 segments, a 
shorter basal segment and a longer terminal one; the 
latter almost lanceolate in form. 
The valvular caudal appendages (see figs. 2, 17) ex- 
hibit a similar structure to those in Arcturus, and are, in 
like manner, furnished at the extremity with 2 pointed 
branches or plates, of which, however, one is exceedingly 
small and completely overlapped by the other (see fig. 23). 
The males differ but little in their outer habitus from 
the females. 
In the structure of the antennae, too, no essential 
difference can be detected. 
The outer sexual appendices proceed (see fig. 17), as 
in Arcturus, from the ventral side of the 1st abdominal 
segment, between the bases of the corresponding pleopoda. 
They constitute (fig. 18) 2 short, conical, somewhat incurv- 
ing and, in the middle, contiguous projections, on the ob- 
tusely rounded extremities of which is located the opening 
for the vas deferens. 
Of the abdominal limbs, the 2nd pair (fig. 21) has a 
peculiarly modified form, to the base of the inner plate 
being attached an exceedingly long and slender, stylifoim 
appendix, reaching almost to the extremity of the terminal 
segment, and generally lying close up to the corresponding 
appendix on the opposite side (see fig. 17). 
Colour of the body in both sexes a uniform dirty 
o rev. very nearly the same as that of the mud through 
which the animal moves. Of any distinct deposits of pig- 
ment, no trace whatever could be detected in the recent 
specimens. 
Length of the largest examples reaching 50 ,,m ; and 
hence, in point of size, it about ranks with 67. Sabini. 
Occurrence and Distribution. — Specimens of this 
species were taken at 5 different Stations, all in the cold 
area; depth ranging from 1081 to 1710 fathoms. 
’ Llic extent of its distribution, as known at present, 
comprises accordingly the deep ocean tract between Norway, 
Beeren Eiland, and Spitzbergen on the one side, and Ice- 
land Jan Mayen and Greenland on the other, from the 
63rd to the 78th parallel of latitude. In the eastern part 
of the Polar Sea, it would not, on the other hand, appear 
to occur. Throughout this region the species is represented 
b y the approximating form Ol. Sabini, which, according to 
Stuxberg. is remarkably abundant here, and which, on the 
Norwegian Expedition too, was met with, a single specimen 
having been taken in the sea extending between Beeren 
Eiland and Novaja Zemlja. 
lo* 
