85 
at en detailleret Beskrivelse af samme bliver ganske over- 
flodig. 
Det samme gjselder ogsaa Bagkroppens Svommeved- 
hseng og de ydre Halevedhseng. 
Det midterste Halevedliaeng viser ligeledes en meget 
lignende Bonn, men skiller sig Ted noiere UndersOgelse 
derved, at Spidsen ikke viser nogen Udrandning i Midten, 
bvorimod den lier er noget udbuet og til liver Side bevtebnet 
med 3 meget smaa, men dog noget nlige udviklede Tomer. 
Farven er i levende Tilstand hvidagtig, med den for- 
reste Del af Rygskjoldet og Spidsen af Bagkroppen svagt 
rodligt pigmenteret. Munddelene og Basis af Fodderne er 
noget mere intenst rpdfarvede. 
Lcengden af det storste erholdte Exemplar er 65” mi , 
men iaknindelighed er Stprrelsen af fuldt udviklede Indi- 
vider betydelig mindre. 
Udvikling. Ogsaa lios denne Art er de under Hun- 
nens Bagkrop frestede Big af paafaldende Storrelse og dei- 
for faa i Antal. Ved Dissection af samme bar jeg kunnet 
overbevise mig om, at ogsaa lier Ungen forlader ^Egget i 
fuldt udviklet Tilstand, uden at gjennemgaa nogen postem- 
bryonal Metamorphose. 
Forekomst og Udbredning. Alien er forst opdaget 
under den 0sterrigsk-Ungarnske N ordpolexpedition i Haiet 
omkring Frantz Josephs Land og er beskrevet og afbildet 
af Heller i ovenanforte Skrift som en Art af Slsegten Hip- 
polyte.' 
Under vor Expedition bar vi taget den paa ikke mindre 
end 10 forskjellige Stationer, hvoraf de allerfleste tillmrer 
den kolde Area, og fra et Dyb af 350 — 1100 havne. 
Dens for Tiden bekjendte geograpliiske Udbredning 
strtekker sig herefter fra den 63de til den 82de Bredegrad 
og fra circa. 2° Y. L. til 70° 0. L. og rimeligvis endnu 
videre mod 0st. 
At den ligesom foregaaende Art maa ansees som en 
segte arktisk Form, fremgaar tilstrsekkeligt af de ovenfoi 
givne Data. 
Fam. Ephyridse. 
Gen. Hymenodora, G. 0. Sars. 1877. 
Prodromus descriptioms Crust, etc. 
Slaegtscharaeteristik. Legemet nsesten trindt, ikke 
sammentrykt fra Siderne. Integumenterne overordentlig 
tynde og bpielige, nsesten membranpse. Rygskjoldet fortil 
i Midten kjplet og forsynet med et sammentrykt Pandehorn. 
hibited by the said parts in the preceding species, that a 
detailed description may be held as wholly superfluous. 
The same remark applies, too, to the pleopoda. as 
also to the outer caudal appendages. 
The telson likewise exhibits a very similar form, but 
differs, on closer examination, by reason of the point hav- 
ing no emargination in the middle; here, however, it is 
slightly curved, and on either side armed with 3 exceedingly 
small, but somewhat unequally developed spines. 
Colour, in a living state, whitish, the anterior part 
of the carapax and the point of the abdomen being however 
faintly tinged with reddish pigment. The oral appendages 
and the base of the legs are somewhat more intensely red- 
coloured. 
Length of the largest specimen obtained 65”"; but 
as a rule the size of full-grown individuals is considerably 
less. 
Development. — In this species, too, the ova attached 
beneath the abdomen of the female are remarkably large, 
and therefore but few in number. By dissection, I have 
convinced myself that the young of this animal also leave 
the egg in a fully developed state, and accordingly do not 
pass through any postembryonal metamorphosis. 
Occurrence and. Distribution. — The species was 
first discovered on the Austrio-Hungarian North Pole Expe- 
dition. in the open sea. a short distance off Frantz Joseph’s 
Land, and has since been described and figured by Heller 
in the aforecited work, as a species of the genus Hippolyte. 
On our Expedition, we obtained the species at not 
less than 10 different Stations, by far the greater part 
of which belong to the cold area, and from a depth of 
350 — 1100 fathoms. 
Hence, the geographical distribution of the species, 
as known up to the present time, ranges from the 63rd 
to the 82nd parallel of latitude, and from about long. 2° 
W. to long. 70° E., nay probably still farther east. 
That the animal must, in common with the foregoing 
species, be regarded as a true Arctic form, is manifest from 
the data given above. 
Fam. Ephyridse. 
Gen. Ilymenodora, G. 0. Sars. 1877. 
Prodromus descriptionis Crust, etc. 
Generic Character. — Body almost round, not com- 
pressed from the sides. Integuments exceedingly thin a.nd 
flexibile, almost membranaceous. Carapax keeled in the 
middle anteriorly, and furnished with a compressed rostrum. 
5 * 
