25 
oftest shatteret med st 0 rre uregelmsessige Pletter eller Skjolde 
af en m0rkere brun Couleur. 
Lasngden af de storste Exemplarer er, maalt fra En- 
den af 2det Par Fo'lercs Blad til Spidsen af det midterste 
Halevedhseng 130"™, og den her omhandlede Form staar 
saaledes neppe tilbage i Storrelse for nogen af de tidligere 
bekjendte Arter af Slsegten. 
Udvikling. De under Hunnernes Bagkrop fsestede 
-<Eg er (se Fig. 2) forholdsvis af temmelig betydelig Stor- 
relse. hvilket t0r tyde hen paa, at Ungernes Udvikling er 
forbunden med en rnindre fuldstsendig Metamorphose end 
bos de ovrige Crangonider. Hos ingen af de erboldte Ex- 
emplarer var dog .ZEggenes Udvikling saa vidt fremskreden, 
at dette med Sikkerhed kunde constateres. 
Gfanske unge Individer af kun 16 — 18 Mm. s Lamgde 
er af noget slankere Kropsform end fuldt udvoxede Dyr 
og bar Pandehornet forholdsvis stprre og de tornformige 
Fortsatser paa Legemet skarpere fremtrmdende. feaavel 
paa Rygskjoldets som Bagkroppens Overflade Andes spredte 
og temmelig lange Haar. 
Porekomst og Levevis. I vore Have er denne Art 
en aegte Dybvandsform, som neppe nogensmde her trmffes 
for i en Dybde af omkring 100 Favne. medens den gaar 
ned lige til 459 F. og maaske endnu dybere. Derimod 
synes den ved Kamtschatka at leve paa betydelig grundere 
Vand, da den her, ifplge Tilesius fanges i stor Msengde nser 
Kysten af de Indfodte, del 1 anvender den til Naming. Lige- 
som de ovrige Crangonider er den en udpraeget Bundform, 
hvilket tydeligt nok fremgaar af dens bele Organisation og 
navnlig af de stserkt incrusterede Integumenter, der giver 
Legemet en betydelig specifisk Vaegt og neppe tillader Dyret 
at gjore ret lange Udflugter i Vandet. De af os indsamlede 
Exemplarer var ogsaa kun lidet livlige i sine Bevaegelser 
og lioldt sig fordetmeste rolige paa Bunden af de Kar, 
bvori de opbevaredes for nsermere Observation. 
Udbredning. Saavel de til Glrund for lilesiuss som 
Owen’s Beskrivelser bggende Exemplarer var fra Kamt- 
schatka. som tidligere var det eneste bekjendte Findested 
for nservserende Aid. 
I et nylig af Dr. Stuxberg udgivet interessant Skrift 
betitlet: “Evertebratfaunaen i Sibiriens Ishav anfores imid- 
lertid denne Art at vaere fundet under Nordenskjolds Ex- 
pedition 1876 i det kariske Hav paa et Par Lokaliteter. 
Under vor Expedition bar vi taget den paa 6 for- 
skjellige Stationer, bvoraf de 4 tilhorer Havet omkring 
Spitsbergen, medens de 2 ovrige ligger vidt adskilte, den 
ene ved Jan Mayen, den anden i Havet udenfor vor Yestkyst. 
Dens for Tiden bekjendte geografiske Udbredningsfelt 
strcekker sig herefter fra Kamtschatka og Behringsstrmdet 
vestlig idetmindste til 8° V. L. og fra den 63de til den 
<80de Bredegrad. 
Den norske Nordhavsexpedition. G. O. Sars: Crustacea. 
a rule relieved with comparatively large irregular spots or 
patches, of a darker brown colour. 
The length of the largest specimens, measured from 
the extremity of the scale of the 2nd pair of antennas to 
the tip of the telson. reaches 130"™; and hence the form 
here treated of can, as regards size, hardly yield precedence 
to any of the previously known species of the genus. 
Development. — The eggs attached beneath the 
abdomen of the females (see fig. 2) are comparatively large, 
a circumstance from which, perhaps, we may infer, that 
the development of the young animals is attended with a 
less complete metamorphosis than in any of the other Cran- 
gonidee. In none, however, of the specimens collected had 
the ova attained a stage of development that would admit 
of confirming the assumption with certainty. 
Very young animals, not exceeding 16 — 18 millimetres 
in length, have the body of a somewhat more slender form 
than full-grown individuals, the rostrum, too, relatively larger, 
and the spiniform prolations on the body more sharply 
defined. Both on the carapax and the surface of the ab- 
domen are seen scattered hairs of considerable length. 
Occurrence and Habits. — In the North Atlantic, this 
species is a true deep-sea form, rarely, if ever, met with at a 
depth less than about 100 fathoms, though elsewhere it descends 
to 459 fathoms, and possibly still deeper. On the other hand, 
off the coast of Kamtschatka it would appear to inhabit much 
shallower water, being there, according to Tilesius, taken 
near the coast in great abundance by the natives, who 
consume the animal as food. Like all other Crangonidce, 
it is a well-marked bottom-form, a fact sufficiently apparent 
from its whole organization, and in particular from the 
thickly incrusted integuments, which give to the body a 
considerable specific weight, and can hardly admit of the 
animal travelling far through the water. Nor were the 
specimens we collected particulary brisk in their movements, 
keeping as they did during the greater part of the time 
quietly at the bottom of the vessels in which they were 
preserved for closer examination. 
Distribution. — The specimens to which the descrip- 
tions both of Tilesius and of Owen refer, were from oft’ 
Kamtschatka, formerly the only known habitat of the 
present species. 
■ According to an interesting paper lately published by 
Dr. Stuxberg, bearing title: — “Evertebratfaunaen i Sibi- 
riens Ishav” (The Evertebrate Fauna in the Polar Seas of 
Siberia), this species would appear to have been taken on 
Nordenskj old's Expedition in 1876, from the Kai - a Sea. 
in one or two localities. 
During the course of our Expedition, we obtained 
the animal at 6 different Stations, 4 in the sea surrounding 
Spitzbergen, the 2 others lying wide apart, one at Jan 
Mayen, the other off the western shores of Norway. 
Hence, the geographical distribution of the species as 
yet known, ranges in a westerly direction from Kamtschatka 
and Behring’s Strait at least to long. 8° IV.. and from the 
63rd to the 80th parallel of latitude. 
4 
