73 
c ^ en bevaegelige Finger sees desuden en stprre, i Enden 
twdvlef'tot Tuberkel. som ganske mangier Uos Hunnen. 
Gravefedderne (Fig. '27 og 30) er enonnt forlamgede. 
inesteu at hele Legemets L;eugde og udinserksr sig desuden 
dei vod. at de kos Hunnen i den indre Kant, at mestsklste 
I^ed bested e Borster her er omdannede til Torner at et 
bgnende l dseende som de 3 i den forreste Del fmstede. 
skjendt noget inindre. 
Bagkroppens Bnglemmer er forholdsvis kraftigere ud- 
viklede og forsynede med talrigere og lsengere Svpnime- 
borstcr. Desuden bemserkes den Eiendommelighed, at dei 
bl Afsatsen i den indre Gren er f sestet ikke som bos Hunnen 
en ei dcelt. men 2 grove Borster. 
Farven er saavel bos Hannen som bos Hunnen ens- 
iorniig livid, uden noget bemserkeligt Figment. 
Lasngden af Hunnen er 5’™, af Hannen nassten (>*". 
Forekomst og Udbredning. En Del Exemplarer af 
denne masrkelige Isopode erholdtes under Expeditionens 1 ste 
^°St i Hav r et mellem Norge og Island (Stat. 40 og 51) tia 
clet betydelige Dyb af 1163—1215 Favne. Et enkelt Ex- 
emplar optoges endelig under sidste Togt l est, af Spits- 
bergen (Stat. 353) fra et endnu storre Dyb, nemlig 1333 
Favne. 
Arteus hidtil bekjendte Udbredningsfelt er saaledes den 
d .vbe med iskoldt Yand ved Bundeu fyldte Havdal mellem 
^ 0r ge. Beeren Eiland og Spitsbergen paa den ene Side 
°g Island. Jan Mayen og Gronland paa den anden. fra den 
63 de til den 78de Bredegrad. 
Fam. 2. Tanaidse. 
Gen. 1 . Cryptocope, G. 0. Sars. 1881. 
Revision af Omppen Isopoda chelifera. 
Slsegtscharacteristik. Legemet af underssetsig Byg- 
uiu 8< med mere eUer mindre skarpt atsatte Seginenter. 
Hovedskjoldet fortil lige afskaaret, uden tydelige 0ienlober. 
^ s tc Par Ffllere hos Hunnen 4-leddede. bos Hannen betj* 
tleli 8 sta*rkere udviklede, med tykt 2-leddet Skaft og 5-leddet 
Svobe besat med tjette Knipper af Sandseborster. Kind- 
bakkerne af middelmaadig Storrelse, med sammentrykt. plade- 
torinig Tyggefortsats. Saxfodderne kraftigt udviklede. af ens 
Fdseende bos begge Kjon. Gaugfodderne spinkle, indbyrdes 
bdet tors kj el lige. Bagkroppens Buglemmer bos Hunnen 
o' erorilentlig smaa og rudimenttere. med 2 smaa borstelose 
Fndepiader. bos Hannen vel udviklede, med lange Svomme- 
borster. Halevedhamgene med 2 ■rnlige udviklede Giene. 
^ l0s Hannen betydelig lsengere end hos Hunnen. 
1)011 norske Nonlliavsexuudition. G. O. Sars: Crustacea. 
of the movable finger is seen a large, at the extremity 
bifurcate, tubercle, entirely wanting in the female. 
The fossorial legs (figs. 27. 30) are enormously pro- 
duced. equalling almost the whole of the body in length; 
moreover, they may also be distinguished by the bristles in 
the female attached along the inner margin of the penulti- 
mate joint being here transformed into spines, similar in 
appearance to the 3 on the foremost part, though a trifle 
smaller. 
The pleopoda exhibit comparatively a more powerful 
development, and are furnished with numerous and long 
natatory bristles. Moreover, they are also characterized by 
the ledge-like projection on the inner branch not having, 
as in the female, a solitary bristle attached to it. but 2 
coarse ones. 
Colour, both in the male and female, a uniform white, 
without any trace of pigment. 
Length of female 5’"“. of male almost 6"™. 
Occurrence and Distribution. - — Some tew speci- 
mens of this remarkable Isopod were taken, on the 1st 
cruise of the Expedition, in the open sea. between Norway 
and Iceland (Stats. 40. 51), at the considerable depth of 
1163 1215 fathoms. A single specimen was brought up, 
on the last cruise, west of Spitsbergen (Stat. 353), from a 
still greater depth, viz. 1333 fathoms. 
Hence, the tract over which the species is at present 
known to be distributed, comprises the deep ocean valley, 
tilled at the bottom with ice-cold water, extending between 
Norway. Beeren Eiland, and Spitsbergen . on the one side, 
and Iceland. Jan Mayen, and Greenland, on the other. - 
from the 63rd to the 78th parallel of latitude. 
Fam. 2. Tanaidae. 
Gen. 1. Cry ptocope, G. G. Sars, 1881. 
Revision af Gruppen Isopoda clielifera. 
Generic Character. ■ — ■ Body thickset in structure, 
with more or less sharply defined segments. Cephalic shield 
truncate anteriorly, without distinct ocular lobes. First 
pair of antennae, in female, four-jointed, in male much more 
powerfully developed, with a thick, two-jointed peduncle and 
a five-jointed flagellum, beset with dense fascicles of sensory 
bristles. Mandibles moderate in size, with a compressed, 
lamelliform molar projection. Chelipeds powerfully developed, 
of same appearance in both sexes. Ambulatory legs slender, 
differing but little one from the other. Pleopoda, in female, 
remarkably small and rudimentary, with 2 diminutive, naked 
terminal plates; in male well developed, and having long 
natatory bristles. Caudal appendages with 2 unequally de- 
veloped branches, in male much longer than in female. 
10 
