105 
som Piggene paa et sammenrullet Pindsvin (derai Arts- 
benaivnelsen). 
Integumenterne er sserdeles haarde og faste, skjondt 
n°got gjennemsigtige og uden nogen tvdeligt udpraeget 
kulptur oiler Haarbesaetning. 
Hovedet er noget nedtrykt og liar Panderanden i 
Odteii temmelig stserkt udrandet, saa at Sidohjornerne 
bidder frem som afrundede Lapper, der delvis daekker 2det 
ar Poleres Basalled. Enliven af disse Lapper gaar nedad 
11< I i et skarpt tandformigt Fremspring. Oventil er Hove- 
( 1 1 lorsynet mod 8 tornforraige Fortsatser, hvoraf de 2 
s kutr over og noget foran 0inene, medens de ovrige 6 dan- 
111 1 en buet Tvserrad over den bagcrste Del af Hovedet. 
lste frie Forkropssegment bar Sidedelene udviklcde 
pfia en lignende Maade som hos de 2 foregaaende Arter 
01 skjaevt fortilrettede Lapper. Det bar en regelmsessig 
T\;errad af 8 spidse Torner. Ethvert af de 2 folgende 
Segmenter Hser en fuldkommen lignende Bevaebning. 4de 
egment er betydelig baade lamgere og bredere end de 
0 uige og har 2 Tvmrrader af spidse Torner. De 3 M- 
bdnde Segmenter aftager burtigt i Brede bagtil og bar 
en enkelt Tvserrad af Torner saint tilspidsede og til 
iderne stserkt ndstaaende Epimerer. 
Pagkroppen, der omtrent indtager 1 /,t af Totallamg- 
tcn > Oestaar tilsyneladende kun af 2 Segmenter, idet det 
^det er ufuldstamdigt begne-ndset fra Endesegmcntet. lste 
‘ '‘binent er meget lidet og har en Tv.errad af Torner, 
si<m dog er m [ nt | re elic ( p aa Forkropssegmenterne. 
'•departiet, der altsaa ogsaa omfattcr det bos de 2 fore- 
gaaende Arter tvdeligt begnendsede 2det Segment, viser 
01 liver Side 2 standee triangulsere og noget bagudkrum- 
' n, ‘de ■ Fortsatser og har oventil 4 parvis stiilede, ligeledes 
'‘Ludkrummede Torner, hvorpaa folger en dobbelt Rad af 
en ^ ( d noget mindre saadanne. Enden er ikke som hos 
( 1 2 foregaaende Arter simpelt tilspidset, men viser i Mid- 
| < n en tydelig Udrandning begrasndset til liver Side af et 
v0 O tandformigt Fremspring. 
Oinene er meget smaa, cirkelrunde og ndstaaende til 
kiderne, med morkt Pigment. 
lste Par Folere (Fig. 25) er omtrent af Hovedets 
te ngde og viser en lignende Bygning som bos de 2 fore- 
S^aende Arter, dog med den Forskjel, at Svpben her er 
ni, -get smal, lineaer og lain forsynet med 3 Sandsevedlneng 
na * Spidsen. 
2det Par Folere (se Pig. 23 og 24) er vistnok i For- 
°ld til ist e p ar kraftigt udviklede, men dog paa langt 
p‘ ei ^klce som bos de 2 foregaaende Arter, idet deres 
Oamgde i fuldt udstrakt Tilstand er kjendelig mindre end 
°tallaengden. Basalafsnittet, som ogsaa her egentlig dan- 
111 s at g Led, er kort og tykt og gaar ved Enden paa den 
l>en 
norske Nordhavsexpedition. G. 0. Sars: Crustacea. 
everywhere armed, and that bristle out oil all sides, like 
the quills of a rolled-up porcupine (hence the specific de- 
signation). 
The integuments are exceedingly bard and firm, 
though somewhat translucent, and have no perceptibly pro- 
minent sculpture or covering ol hair. 
The bead is slightly depressed, with the frontal 
margin considerably emarginate in the middle, causing the 
lateral corners to protend as rounded lobes, that partly 
cover the basal joint of the 2nd pair of antennae. Each 
of these lobes juts out below as an acutely dentiform pro- 
jection. Above, the head is furnished with 8 spiniform 
projections, of which 2 are placed above and a little an- 
terior to the eyes, whereas the remaining 6 constitute an 
arcuate transverse series, above the posterior part of the 
head. 
The 1st free segment has the lateral parts developed 
in a manner precisely similar to those in the preceding 
species, viz. as oblique, anteriorly directed lobes. It has 
a regular transverse series of 8 acute spines. Each of 
the 2 succeeding segments exhibits a perfectly similar 
armature. The 4th segment is a good deal longer and 
broader than the others, and has 2 transverse series of 
acute spines. The 3 succeeding segments diminish rapidly 
in breadth posteriorly, and have each of them a single 
transverse series of spines, together with pointed epimera, 
projecting very considerably toward the sides. 
The posterior division of the body, measuring about 
one-fourth of the total length, consists apparently of but 2 
segments, the 2nd segment being imperfectly separated 
from the terminal one. The 1st segment is very small, 
and has a transverse series of spines, which, however, are 
smaller than those on the segments belonging to the an- 
terior division. The terminal portion, comprising also ac- 
cordingly the 2nd segment — distinctly defined in the 2 pre- 
ceding species — exhibits on either side 2 strong triangular, 
and somewhat posteriorly curving projections, and has, 
above 4 pairs of likewise posteriorly curving spines, to 
which succeeds a double series of similar hut smaller ones. 
The extremity is not, as in the 2 preceding species, simple 
pointed, but exhibits in the middle a distinct emargina- 
tion. bounded on either side by a short dentiform pro- 
jection. 
The eyes, laterally protruding, are very small, cir- 
cular in shape, and furnished with a dark pigment. 
The 1st pair of antennae (fig. 25) are about of the 
same length as the head, and in structure similar to those 
in the 2 preceding species, saving, however, that the flag- 
ellum is very slender, linear, and provided with only 3 
sensory appendices, in close proximity to the point. 
The 2nd pair of antennae (figs. 23, 24) are, indeed, 
as compared with the 1st pair, powerfully developed, by 
no means, however, to the same extent as in the 2 pre- 
ceding species, their length, when fully extended, being 
perceptibly less than that of the body. The basal section, 
which here, too, strictly, consists of 2 joints, is short and 
14 
