°S omtrent af samme Laengde som Svobens Basalled samt 
'isw 4 tydelige Led, hvoraf det lste er st0rst. 
2det Par Folere er baade kortere og tyndere end 
' S L Par. Af Skaftets Led er det nsestsidste stserkt for- 
henget og smalt, hvorimod sidste Led er ganske lidet. 
Svnben er kortere end Skaftet og utydeligt leddet. 
Munddelene kunde, som anfprt, paa det eneste fore- 
^egende Expl. ikke noiere undersqges. Dog sees allerede 
u dvendigt, at Kindbakkerne er forsynede med vel udviklede 
Palper af den for Gammarinerne saedvanlige Bygning. 
De 2 forreste Fodpar er temmelig svagt udviklede og 
ens Bvgning, men 2det Par noget mere forlsenget end 
l^ste. Haanden er ganske simpel, smal, ikke subcheliform 
1J eppe Uengero end det foregaaende Led. Begge Par er 
1 Kanterne besatte med korte Borster. 
De 2 folgende Par udimerker sig i hdi Grad ved den 
Dendommelige Udvikling af 3die Led. Dette er mere end 
dobbelt saa langt som de 2 sidste tilsammen, saerdeles gjen- 
n enjsigtigt og starlet sammentrykt eller aarebladformigt, 
' 3l e dest paa Midten og jevnt afsmalnende mod begge Ender, 
samt i begge Ranter besat med korte Borster. Af de 2 
ydi'e Led er det sidste lmngst og koniskt tillobende samt 
'f‘d Spidsen forsynet med en kraftig og meget bevsegelig 
°. der kan slaaes belt ind mod Leddet. 
De 3 bagerste Fodpar bar Hofteleddet ganske smalt. 
som soedvanlig pladeformigt. Det ydre Parti var paa 
e ~ forreste af disse Par afbrukket; paa sidste Par er 
^ c ‘t stserkt forlsenget og smalt, nsesten traadformigt, med 
^fydelig Segmentering og nsesten borstelost. 
Be 3 Par Svommefodder er kraftigt udviklede og af 
Sit ‘dvanlig Bygning. 
Af Halefodderne er de 2 fox’reste Par meget stserkt 
°ilsengede, simple, 2-leddede. Derimod bar sidste Par 2 
° u itront ligeligt udviklede lancetformige Grene. 
Halevedhsenget er yderst lidet og rudimentsert. 
Begemet er gjennemsigtigt, nsesten vandklart, nden 
n °gen tydelig Pigmentering, 
Lsengden af det undersOgte Exemplar er 11”'"’. 
Forekomst. Et enkelt Exemplar af denne mserkelige 
Aniphipode blev under Expeditionens lste Togt taget i 
avet udenfor vor Kvst (Stat. 54) fra et Dyb af 600 Fax ne. 
1 a n det incomplet Exemplar blev senere udprsepareret af 
^ a )eindboldet af den mserkelige Dybvandsfi.sk, Rodichthys 
'ty'na Collett, taget paa Stat. 297 fra et Dyb af 1280 
* aviie. 
De 
and about the same length as tbe basal joint of the true 
flagellum, as also exhibiting 4 distinct articulations, of 
which the 1st is the largest. 
The 2nd pair of antenna are both shorter and more 
slender than the 1st. Of the joints of the peduncle, the 
penultimate is greatly produced, and slender, whereas the 
last joint is quite small. The flagellum is shorter than 
the peduncle, and indistinctly articulated. 
The oral appendages could not, as previously men- 
tioned, be submitted to close examination in the only speci- 
men before us. Meanwhile, the mandibles are seen, even 
externally, to be furnished with well-developed palps of the 
structure usual in Gammaridians. 
The 2 foremost pairs of legs exhibit a rather feeble 
development and a uniform structure; but the 2nd pair 
are a trifle more elongate than the 1st. The hand is 
quite simple, slender, non-subcheliform, and scarcely at all 
longer than the preceding joint. Both pairs are fringed 
along the margins with short bristles. 
The 2 succeeding pairs have a most prominent char- 
acter in the peculiar development of the 3rd joint. This is 
more than twice as long as the 2 last joints taken together, 
well-nigh, translucent, and greatly compressed or oar-shaped, 
broadest in the middle, and gradually tapering to both ex- 
tremities, as also beset on both margins with short bristles. 
Of the 2 outer joints, the second is the longer, and conically 
produced, bearing also at the point a powerful and very 
mobile claw, which admits of being jerked back in direct 
contact with the joint. 
The 3 hindmost pairs of legs have the basal joint 
quite slender, — not, as usual, lamellifonn. The outer part of 
the 2 foremost of these pairs was broken off; on the last 
pair," it is greatly produced and slender, well-nigh filiform, 
with indistinct segmentation, and almost bristleless. 
The 3 pairs of pleopoda are powerfully developed and 
normal in structure. 
Of the caudal stylets, the 2 foremost pairs are very 
greatly produced, simple, and two-jointed. On the other 
hand, the last pair have 2 about equally developed lanceolate 
branches, ,. , 
T] ie tolsoii is exceedingly small and rudimentai 3 . 
The body is translucent, almost hyaline, without dis- 
tinct pigmentation. 
Length of the specimen examined 11""”. 
Occurrence. — One example of this remarkable Arn- 
lipod was taken, on the 1st cruise of the Expedition, off 
ie Norwegian coast (Stat. 54), at a depth of 600 fathoms, 
nother (defective) specimen was subsequently extracted from 
o stomach of the remarkable deep-sea fish, Rodichthys 
\ g ina Collett, brought up at Stat. 297, from a depth of 
30 
11 norske Nordhavsexpedition. G. O. Sars: Crustacea. 
