"_”~C 
Form, uden nogen bemerkelig Opsvulmning i Enden. 
Af Pigment eller Synselementer er der ikke det 
ringeste Spor at opdage. 
_. De ovre Folere (se Pl. IV, Fig. 9) er forholds- 
vis kortere end hos foregaaende Art, forovrigt af en 
meget lignende Bygning. Svoben er kun lidet len- 
gere end Skaftet og kun sammensat af 10 Led. Det 
skjelformige Appendix er derimod forholdsvis storre 
end hos foregaaende Art, nesten halvt saa langt 
som Sveben, og af en mere aflang Form, forevrigt 
forsynet med en lignende kostformig Besetning af 
stive Borster. 
De nedre Folere (ibid.) stemmer idethele saa 
neie overens med samme hos foregaaende Art, at en 
neiere Beskrivelse er unodvendig. 
Ogsaa Munddelene viser en meget lignende Byg- 
ning, skjondt enkelte mindre Differentser ved noiere 
Sammenligning lader sig paavise. Saaledes er Man- 
diblernes Palper (se Fig. 12) forholdsvis noget min- 
dre, og deres 2det Led har kun en enkelt meget 
sterk Borste i den ydre Kant ner Spidsen. Forste 
Par -Kjever (Fig. 13) er ligeledes noget svagere ud- 
viklede, men forovrigt paa det nermeste af samme 
Udseende som hos N. bipes. Paa 2det Par Kjever 
(Fig. 14) er Endognathens 2 Led kun ufuldkomment 
- sondrede og nesten af ens Lenge; Exognathen er 
neppe mere end halvt saa lang og har et ringere 
Antal Randborster end hos N. bipes. 
Branchialfodderne (Fig. 15, 16) udmerker sig 
navnlig ved Endopoditens Leengde og Tyndhed. Paa 
de forreste Par overrager den betydeligt Exopoditen 
og har sidste Led sterkt omboiet samt besat med 
serdeles lange divergerende Fjerbjorster. Exopo- 
diten er af skjzvt oval Form og forsynet med flere 
Randborster, hvoraf de yderste er tydeligt cilierede. 
Epipoditen har paa alle Par den dorsale Lap be- 
tydelig mindre end den ventrale, medens det om- 
vendte var Tilfeeldet. hos foregaaende Art. Som hos 
denne, bemerkes nogen Forskjel i de forskjellige 
Hoveddeles indbyrdes Forhold paa de forskjellige 
Par Branchialfodder. Sidste Par (Fig. 16) har saa- . 
ledes et fra 1ste Par (Fig. 15) temmelig afvigende 
Udseende og skiller sig ogsaa kjendeligt fra det til- 
svarende hos N. bipes (Pl. III, Fig. 6). Endopoditen 
er her, i Modsetning til hvad Tilfeeldet er med de 
evrige Par, meget kort og uden nogen tydelig Led- 
deling, og Exopoditen er ligeledes forholdsvis min- 
dre end hos N. bipes og i Yderkanten forsynet med 
en Rad af cilierede Borster. Fem lignende Fjer- 
borster findes ogsaa paa den korte og tilrundede 
- ventrale Lap af Epipoditen. 
Svemmefodderne forholder sig i alt vesentligt 
som hos N. bipes; kun er de idethele af en noget 
5 — G. 0. Sars: Fauna Norvegize. 
33 
out to a point. The ocular stem itself is of conical 
shape, without any noticeable swelling at the ex- 
tremity. There is not the slightest trace of pigment 
or visual elements to be discovered. 
The superior antenne (see PI. IV, fig. 9) are rela- 
tively shorter than in the preceding species, other- 
wise of a very similar structure. ‘The flagellum is 
only a little longer than the peduncle and is composed 
of only 10 joints. The squamiform appendage is, on 
the contrary, relatively larger than in the preceding 
species, almost half the length of the flagellum -and 
more oblong in form, otherwise furnished with a 
similar supply of stiff bristles. 
The inferior antenne (ibid.) agree, upon the 
whole, so exactly with those of the preceding species 
that a more detailed description is unnecessary. 
The oral parts also exhibit a very similar struc-. 
ture, although upon a closer comparison a few 
small divergencies may be observed. Thus the palpi 
of the mandibles (see fig. 12) are relatively some- 
what smaller, and their 21d joint has only a single, 
very strong bristle on the outer edge, near the tip. 
The first pair of maxille (fig. 13) are likewise some- 
what more faintly developed; but otherwise pretty — 
nearly of the samme appearance as in N. bipes. In 
the 2nd pair of maxilla the 2 joints of the endo- 
gnath are only imperfectly separated and almost 
equal in length; the exognath is scarcely more than 
half as long, and has a smaller number of marginal 
bristles than in N. bipes. 
The branchial feet (fig. 15, 16) especially dis- 
tinguish themselves by the length and slenderness of 
the endopodite. In the foremost pairs it considerably 
overreaches the exopodite, and has the terminal 
joint strongly recurved, and also beset with parti- 
cularly long, diverging plumose bristles. The exo- 
podite is of oblique, oval form, and furnished with 
several marginal bristles, of which the outermost 
are distinctly ciliated. The epipodite has, in all 
pairs, the dorsal lobe considerably smaller than the 
ventral one, whilst the opposite was the case in the 
preceding species. As in that, there is observed 
some difference in the mutual relations of the various 
chief parts of the different pairs of the branchial 
feet. The last pair (fig. 16) have thus a pretty 
divergent appearance from the Ist pair (fig. 15), and 
distinguish themselves perceptibly from the corres- 
ponding pair in N. bipes (Pl. IL, fig. 6). The endo- 
podite is here, in contrast to what is the case in 
the other pairs, very short, and without any distinct 
articular division; and the exopodite is likewise 
relatively smaller than in N. bipes, and is furnished 
on the outer edge with a series of. ciliated bristles. 
Five similar plumose bristles are also found on the 
short and rounded ventral lobe of the epipodite. 
The swimming feet have, in all essential respects, 
the same structure as in N. bipes;.only that they 
