172 
meget skraa, og indtagende omtrent Halvparten af Haan- 
dens Laengde. 
3die og 4do Podpar er temmelig spinkle, tset borste- 
besatte og forsynede mod stor, leformig Endeklo. 
Do 3 bagre Podpar tiltager hurtigt i Lmngde og liar 
Hofteleddet noget udvidet og af oval Form. Endekloen 
paa sidste Par er lige, nassten borsteformig. paa de 2 ov- 
rigo Par derimod tilskjserpet og leformigt krummet. Lige- 
ledes er Borstebesagtningen noget forskjellig, idet sidste Par 
kun barer korte og simple Burster, medens de 2 foregaa- 
ende Par er rigeligt bosatte med lange cilierede Boaster. 
Halofodderne er alle af ens Udseende og aftager sue- 
cessivt i Liengde bagtil. 
Halevedhsenget er meget lidet, i Enden simpelt til- 
mndet. 
Legemet var bos de friskt indfangede Exemplarer 
temmelig gjennemsigtigt, men med et tydeligt fintforgrenet 
Pigment af lys brunlig- violet Parve. 
Lamgden er hos begge de erholdte Individor 18™. 
Forekomst. Kun 2 Exemplarer af denne meget di- 
stinete Art, begge Hunner med stor Brystpose, erholdtes 
under Expoditionens 2det Togt i Havet mellem Jan Mayen 
og Island Ira det betydelige Dyb af 1004 Pavne. Statio- 
nen tilhorer den kolde Area. 
Fain. 5. Atylidae. 
Gen. Ilalirag-es, Boeck, 1870. 
Amphipoda arctica et borealia. 
48. Halirages qvadridentatus, G. 0. Sars, n. sp. 
(PI. XIV, Fig. 4 bis, 4 a—/). 
Halirages qvadridentatus, (t. 0. Sars, Prodromus deseript. Crust, etc., 
No. 116. 
Artscharaeteristik. Legemet snnekkert, noget sam- 
mentrykt, mod sinaa, i den nedre Kant saugtakkede Epi- 
merer. De 2 bagre Forkropssegmenter og de 2 forreste 
Bagkropssegmenter oventil i Midten gaaende ud i enkelte 
bagudrettede Torner. 3die Bagkropssegments Sideplader 
store, naesten retvinklede, med den bagre Rand svagt buet 
og fint crenuleret. 0inene meget store, hoirode. Folerne 
sterdeles stairkt forlangede ; 2det Par overgaaende hole Le- 
meget i Laengde. De 2 forreste Podpar svagt byggede, 
than that on the 1st pair, with the palmar margin very 
oblique and occupying about one-half of the length of the 
hand. 
The 3rd and 4th pairs of legs are rather slender, 
densely beset with bristles, and furnished with a large, 
falciform terminal claw. 
The 3 posterior pairs of legs increase rapidly in length, 
and have the basal joint somewhat dilated and oval in form. 
Tlie terminal claw on the last pair is straight — well-nigh 
setiform, on the 2 other pairs pointed and falciform. More- 
over, the setous armature is somewhat different, the last 
pair having only short and simple bristles, whereas the 2 
preceding pairs are abundantly furnished with long, ciliated 
bristles. 
The caudal stylets are all uniform in appearance, and 
diminish successively in length posteriorly. 
The telson is very small, at the extremity simple 
rounded. 
The body in the recently taken specimens was ap- 
proximately translucent, hut furnished with a conspicuous, 
delicately ramifying pigment, brownish-violet in colour. 
Length of both specimens 18’""'. 
Occurrence. — Only 2 individuals of this very distinct 
species, both females, with large marsupia, were taken on 
the Expedition (second cruise), in the tract of ocean stretch- 
ing between Jan Mayen and Iceland, at the considerable 
depth of 1004 fathoms. The Station at which the specimen 
was secured lay in the cold area. 
Fain. 5. Atylidae. 
Gen. I Ialirag-es 9 Boeck, 1870. 
Amphipoda arctica et borealia. 
48. Halirages qvadridentatus, G. 0. Sars, n. sp. 
(,P1. XIV, tigs. 4 bis, 4 a-- f). 
Halirages qvadridentatus , G. 0. Sars, Prodromus descript. Crust, etc., 
No. llfi. 
Specific Character. — Body slim, somewhat com- 
pressed, with small epimera, serrate along lower margin. 
The 2 posterior thoracic segments and the 2 anterior ab- 
dominal ones, running out above, in the middle of the 
posterior margin, as simple posteriorly directed spines. 
Lateral plates of 3rd abdominal segment large, almost 
rectangular, with posterior margin slightly arched and 
finely crenulated. Eyes very large, bright-red. Antennae 
very greatly elongate; 2nd pair exceeding whole body in 
