38 
■^Eggehinde (se Fig. 24 og 25) og ogsaa uden stor Vanske- 
lighed lod sig udprseparere og noiere undersoge (Fig. 26). 
Det kunde lierved med fuldkommen Sikkerhed constateres, 
at Ungerne hos naervserende Skegt, uligt hvad Tilfseldet er 
hos de ovrige bekjendte Carider. gjennemgaar sin Forvand- 
ling i selve iEgget og kommer til Yerden som fuldkomne 
Decapoder med fuldtallige Lemmer. Den noget afvigende 
Habitus, som den af Hogget udpraeparerede Unge viser fra 
det voxne Dyr (se fig. 26), beror vmsentlig kun paa den 
Omsteendiglied, at Fplerne med sine Yedhseng endnu ikke 
har indtaget sin normale fortilrettede Stilling, men er slaaede 
tilbage langs ad Rygskjoldets Sider. Rimeligvis rettes disse 
Lemmer allerede strax efter don normale Udklsekning ud 
i sin vanlige Stilling, og Ungen ligner da i alt vreseutligt 
fuldkommen det voxne Dyr. 
Forekomst og Udbredning. 4 vel vedligelioldtc og 
levende Exemplarer af denne vakre Caride blev under Ex- 
peditionens sidste Togt optaget i Trawlnettet paa Stat. 295 
fra det anselige Dyb af 1110 Favne. Dette er det eneste 
Punkt, hvor vi under vor Expedition har truffet den. Men 
senere. efter Expeditionens Slut, er af R. Collett lundet 
Levningeme af 2 Exemplarer af s&mme Art i Ventrikelen 
hos den mserkelige af ham beskrevne Dybvandsfisk, lihodich- 
thys regina Coll., der erholdtes paa den lsengere Test be- 
liggende Station 297 og fra et endnu betydeligere Dyb, 
nemlig 1280 Favne. 
Begge de omtalte Stationer er beliggende i Havet 
mellem Jan Mayen og Finmarken og tilhprer den kolde 
Area, hvoraf det med Sikkerhed tor sluttes, at ntervserende 
Art er eu mgte hoi nor disk og arktisk Form, ligesom det 
af de enorme Dyb. paa hvilke den er forefundet, fremgaar, 
at den er en endnu mere udprseget Dybvandsform end nogen 
af de ovrige Arter af-Skegten. 
5. Bythocaris Payeri, (Heller). 
(PL III. Fig. 27). 
Syn: Hippolyte Payeri, Heller. Cmstaceen, Pycnogoniden und Tuni- 
caten der K. K. Osterreich.-Ungar. Nordpol -Expedition, pag. 2, 
PL 1, Fig. 1—4. 
Artscharacteristik. Rygskjoldets Kjol uden tydelig 
Tand. Pandedelen lidet fremspringende, med den midterste 
Tand (Pandehornet) kun ubetydeligt (lsengere end Side- 
tamderne og ikke overragende 0inene. Disse sidste storre 
end hos foregaaende Art, kolleformige, med morkt Pigment, 
lste Par Fpleres indre Svpbe kun hoist ubetydeligt lmngere 
end den ydre. 2det Par Foleres Blad aflangt rhomboidalt, 
mere end dobbelt saa langs som bredt, med Enden skjsevt 
afskaaret og forsynet med tydelige skjondt korte Randborster; 
Den norske Nordhavsexpeditoin. G. O. Sars: Crustacea. 
the eggs and carefully examined (fig. 26). Hence, it could 
be fully substantiated, that the young in this genus, contrary 
to what is the case in all other known Caridians, undergo 
their transformation in the egg itself, from which they 
emerge as perfect Decapods, with the number of their limbs 
complete. The somewhat deviating habitus which the young 
removed from the egg exhibit as compared with that of 
the full-grown animal (see fig. 26), arises chiefly from the 
antennae, with their appendages, not yet having assumed 
the normal, anteriorly directed position, but, contrariwise, 
in their being folded back along the sides of the carapax. 
Probably these parts assume their usual position immediately 
after hatching, and the young then resemble in all essential 
particulars the mature animal. 
Occurrence and Distribution. — Of this beautiful 
Caridian, 4 living specimens, in a perfect state, were brought 
up in the trawl, on the last cruise of the Expedition, at 
Station 295, from the very considerable depth of 1110 
fathoms. This is the only locality in which the species 
was met with on the Norwegian North-Atlantic Expedition. 
Subsequently, however, after the final return of the Ex- 
pedition, Mr. R. Collett found the remains of 2 specimens 
of the same species in the ventricle of the remarkable 
deep-sea fish, EhodicMhys regina , Coll., described by that 
naturalist; the fish was obtained at Station 297. lying some- 
what farther west, and from a still greater depth, viz. 1280 
fathoms. 
Both of the said Stations lay in the open sea, be- 
tween Jan Mayen and Finmarken, a locality belonging to 
the cold area, from which we may with certainty infer, 
that the present species is a true Northern and Arctic 
form; moreover, the enormous depth at which the animal 
occurred shows it to be a still more decided deep-sea form 
than any other species of the genus. 
5. Bythocaris Payeri, (Heller). 
(PL III, fig. 27). 
Syn. Hippolyte Payeri, Heller, Crustaceen, Pycnogoniden und Tuni- 
caten der K. K. Osterreich.-Ungar. Nordpol- Expedition, pag. 2, 
PL 1. figs. 1—4. 
Specific Character. — Keel of carapax without any 
distinctly developed tooth. Frontal area but slightly pro- 
jecting, with the medial tooth (rostrum) scarcely at all 
longer than the lateral teeth, and not jutting over the 
eyes, which are larger than in the preceding species, 
claviform, and coloured with a dark pigment. Inner 
flagellum of 1st pair of antennae but very little longer 
than outer. Scale of 2nd pair of antennae oblongo-rhom- 
boidal, more than twice as long as broad, with the ex- 
