113 
dette ligesom do folgende Segmenter noget hsevet og stierkt 
f °rtykket. 
Be evrige 6 Forkropssegmenter er alle ntesten af ens 
dseende og Storrelse samt forsynede mod tydeligt afsatte, 
Biangulame og bagudrettede Epimerer, der successivt til- 
taae 
a ^ er i Storrelse bagtil. 
bestaa 
forre 
E 
Bagkroppen er omtrent af Eorkroppens Lsengde og 
lr af 4 tydeligt begrtendsede Segmenter, hvoraf do 3 
osto er saerdeles smaa og forsynede mod korte tilspidsede 
in merer. Endesegnientet er derimod overordentlig stort 
^ * u vdt, i sin forreste Del neppe synderlig smalere end 
O'kroppon og oventil stserkt hvmlvet. Dets Sidckanter er 
J e ^nt bueformigt boiede, uden at vise nogen saaadan plud- 
Indknibning paa Midten som hos Ol. Sabim. Enden 
P 1 som hos denne Art uddraget i en skarp Spids, men som 
lei er noget kortere og nreston horizontal, ikke opad- 
krunimot. 
Af 0ine er der ikke det allermindstc Spor at opdage. 
lste Par Folere (Eig. 3), der udspringer test sammen 
la c ^ en forreste Rand af Hovedet, er noget liengere end 
( 1 Bps halve Brede og bestaar af et 3-leddet Skaft og en 
pjlintlrisk, uleddet Svobe. Skaftets lste Led er lcort, men 
redt, Hasten pladeformigt, do 2 ovrige mere cvlindriske. 
‘ 'ebon er noget kortere end Skaftet og iifesten overalt af 
1 as Brede. Langs dens ene Kant benuerkes Here Knipper 
af meget smaa, klare Sandsevedhamg (Lugtepapiller) (se 
5), og til den stumpt endende Spids er (se Fig. 4) 
aruden 3 saadanne endnu faestet en temmelig lang simpel 
°iste og on meget liden penselformig Horeborste. 
2det Par Folere (Fig. 6), der er fsestede til Siderne 
noget nedenfor lste Par, er betydelig storre og kraftigere 
end halft saa lange som For- 
jk'cgede, skjondt neppe mere 
r °ppen. De bestaar af et 5-leddet 
paa 
Midten knmformigt 
Skaft og on mangeleddet Svobe. Af Skaftets Led er det 
Be meget lidet, de ovrige derimod mere eller niindre plade- 
p'migt udvidede og taet borstebesatte i den ydre Kant. 
a udig udmserker 2det Led sig ved sin betydelige Brede 
'ed den stierke, afrundet tungeformige Udviduing, som 
ets ydro Kant danner. Svoben er omtrent saa lang som 
6 ^ sidste Led af Skaftet tilsammen og bestaar af 7 8 
d korte Borster besatte Led. Hos 01. Sabin i er Svoben 
betydelig kortere. 
Munddelene riser idethele i sin Bygning stor Over- 
^sstenimelse med samme hos foregaaende Familie, saaledes 
, 0111 disse er ovenfor fremstillede bos Ardurus baffini, og 
e f ' ’liver derfor kun nodveudigt her i Korthed at frem- 
Se '° de F orskjelligheder, de viser fra samme. 
. Bverlaeben (Fig. 7) er meget massiv og viser over 
dten en med lange stive Borster bpsat Tvserliste. 
uorske N’ordliavsexpedition. G. O. Sars: Crustacea. 
posterior margin both of this segment and of those suc- 
ceeding it, is slightly raised and very considerably incras- 
sated. 
The remaining 6 segments belonging to the anterior 
division are all well-nigh uniform in appearance and size, as 
also provided with distinctly defined, triangular, and posteri- 
orly directed epimera, increasing backward successively in 
size. 
The posterior division of the body is about ol the 
same length as the anterior, and consists of 4 distinctly 
defined segments, the 3 foremost exceedingly small, and 
furnished with short, pointed epimera. The terminal segment, 
on the other hand, is remarkably large and broad, its fore- 
most part but very little, if at all, narrower than the an- 
terior division of the body, and above, very considerably 
arcuate. Its lateral edges are uniformly arched, without 
exhibiting any such abrupt instriction in the middle as 
that occurring in Ol. Sabini. The extremity is, as in that 
species, produced to a sharp point, but somewhat shorter, 
and well-nigh horizontal, not curving upwards. 
Of eyes, not the slightest trace can be detected. 
The 1st pair of antennae (fig. 3), orginating, close 
together, on the anterior margin of the head, somewhat 
exceed in length half the breadth of the latter, and consist 
of a three-jointed peduncle and a. cylindric, non-articulate fia- 
o-ellum. The 1st joint of the peduncle is short, but broad, 
almost lamelliform, the 2 remaining joints being more cy- 
lindrical. The flagellum is somewhat shorter than the ped- 
uncle, and almost everywhere uniform in breadth. Along 
one of its edges, a, re seen several fascicles of exceedingly 
small, translucent sensory appendices (olfactory papillae) 
(see fig. 5). and to the obtusely terminating point is at- 
tached° (see fig. 4), exclusive of 3 such appendices, a com- 
paratively long simple bristle and a very small, penicillate 
auditory bristle. 
The 2nd pair of antennae (fig. 6), attached to the 
sides of, and a little beneath, the 1st pair, arc considerably 
larger, and more powerful in structure, though scarcely more 
than half as long as the anterior division of the body. They 
consist of a five-jointed, in the middle knee-shaped peduncle, 
and a multi-articulate flagellum. Of the joints of the ped- 
uncle the 1st is very small, the rest, on the other hand, 
boiiw more or less lamelliform-dilated, and densely setous 
at the outer edge. The 2nd joint is more particularly 
characterized by its considerable breadth, and by the strong, 
round linguiform dilatation formed by its outer margin. 
The flagellum its about as long as the 3 last joints of the 
peduncle taken together, and consists of from 7 to 8 joints, 
beset with short, bristles. Li Ol Sabini, the flagellum is 
considerably shorter. 
The oral appendages exhibit in their structure on the 
whole very close agreement with those in the preceding 
family, as described above when treating of Ardurus baffin i ; 
and hence I need merely give a brief specification of the 
differences found to exist between them. 
The labrum (fig. 7) is very massive, and has, above the 
middle part, a transverse fillet, furnished with long, stiff bristles. 
15 
