116 
fligformig, Snabelen omtrent af Hovedsegmentets Lrnngde, 
skjsevt nedadrettet, konisk afsmalnende. Saxlemmerne lige 
udstrakte omtrent af Kroppens Lmngde, Skaftet indknebet 
ved Basis, Haanden lidt kortere end Skaftet, Palmen 
kort, triangulser, ved Enden besat med pigformige Borster, 
Fingrene nsesten dobbelt saa lange, kloformige, nsesten 
halvcirkelformigt krummede. Folerne. betydelig kortere end 
Saxlemmerne, tset haarede, 2det Led kengst, de 3 folgende 
successivt aftagende i StOrrelsc , sidste Led meget smalt. 
De falske Fodder lidt kortere end Legemet, hos Hannen 
tret besatte med pigformige Borster, Endedelen betydelig 
kengere end 5te Led, llandtornerne meget smaa, Ende- 
kloen tynd. Gangfoddernc over 3 Gange lsengere end 
Legemet, robuste og kun lidet afsmalnende mod Enden. 
Hofteleddene forholdsvis korte og tykke, Laarleddet ikke 
meget opsvulmet, 2det Lsegled mere end dobbelt saa langt 
som det terminate Afsnit, Fodleddet J /a Gang hengere end 
Tarsalleddet og betydelig smalere, linesert, uden tydeligo 
Tomer i Inderkanten; Endekloen omtrent af Tarsallcddets 
Lsengde, jevnt krummet og sylformigt tilspidset; Biklperne 
overordentlig smaa, nsesten obsolete. De ydre kEgmasser 
kugleformige med talrige iEg. Legemets Lsengde indtil 
22""", Spandvidde 154”"". 
Bemserkninger. Denne Art er for Tiden den eneste 
Reprsesentant for Slsegten Boreonyniphon ; thi hverken blandt 
de talrige af Hoek fra Challenger Expeditioncn beskrevne 
Nymphon-Arter eller blandt de af andre Forskere opforte 
exotiske Former har jeg fundet nogen Tilnsermelse til den 
for nservrerende Skegt eiendommelige Type. Det bliver 
derfor ogsaa temmelig vanskeligt at give en prsecis Arts- 
diagnose af naervserende Form, og de her opforte Charac- 
terer er knn forolobig sammenstillede i Analogi med samme 
hos Nymphon-Arterne. 
Beskrivelse. Den ssedvanlige Lsengde af Legemet 
synes at vmre o mitring 15"™, med en Spandvidde af 104”™; 
men Arten kan undertiden naa en meget betydeligere Stor- 
relse, idet Lsengden kan gaa op til 22”'"' og Spandvidden 
til 154”™. Lignende kjiEinpenifessige Exemplarer er ogsaa 
undersogte af Hansen fra det kariske Hav. 
Legemets Form (se PI. XII, Fig. 3) er idethele ual- 
mindelig kraftig og robust og retfserdiggjrir fuldkommen 
den for Arten valgte Benaevnelse „robustum“. Navnlig 
gjselder dette selve Kroppen (Fig. 3 a, 3 b), der er over- 
ordentlig plum.pt bygget og st&rkt fortykket paa Midten. 
Segmenterne er meget skarpt afsatte fra hinanden og har 
de bagre Kanter tydeligt fremspringende saavel oventil som 
nedentil, hvorved Conturerno, naar Dyret sees fra Siden 
(Fig. 3 a), faar et noget saugtakket Udseende. Sidefort- 
satserne er korte og tykke, nsesten kolleformige, og kun 
adskilte ved meget smale, spaltformige Mellemrum. Paa 
sin pvre Side er de, ligesom Kropssegmenterno, rue af yderst 
smaa mikroskopiske Pigge. Hovedsegmcntet cr af meget 
betydelig Storrelse, selv kjendelig kengcre end de 3 folgende 
roughened by small microscopical spines. Ocular tubercle 
extremely small, lobiform. Proboscis about same length as 
the cephalic segment, directed obliquely downwards, drawn 
out conically towards the point. Chelifori, straightly ex- 
tended, about same length as the body; scape constricted 
at the base, hand a little shorter than the scape, palm 
short, triangular, beset at the extremity with spiniform 
bristles; fingers nearly twice; as long, claw-shaped, almost 
seini-circularly curvate. Palpi considerably shorter than 
the chelifori, densely setous; 2nd joint longest, the 3 suc- 
ceeding ones diminishing successively in size ; last joint 
very narrow. False legs slightly shorter than the body; 
in the male densely beset with spiniform bristles; the 
terminal portion considerably longer than the 5th joint, 
marginal spines very small, terminal claw slender. Ambul- 
atory legs more than 3 times longer than the body, robust 
and only narrowing slightly towards the extremity ; coxal 
joints relatively short and thick; femoral joint not much 
tumefied; 2nd tibia! joint more than twice as long as the 
terminal division, propodal joint one half longer than the 
tarsal joint and considerably narrower, linear, and without 
distinct spines on the inner margin, terminal claw about 
same length as the tarsal joint, uniformly curved, and 
pointed like an awl; auxiliary claws extremely small, 
almost obsolete. The outer egg-masses globular, contain- 
ing numerous ova. Length of the body reaching 22”™. 
Extent 154’"'". 
Bumarks. This species is, at present, the only re- 
presentative of the genus Boreonymphon ; as neither among 
the numerous Nymphon-species from the Challenger Ex- 
pedition, described by Hoek, nor among those exotic forms 
described by other naturalists have I found any approx- 
imation to the type peculiar to the genus. It is therefore 
somewhat difficult to furnish a precise specific diagnosis of 
the present form, and the characters remarked upon, here, 
are only temporarily placed together in an analogy to the 
same characters in the Nymphon-species. 
Description. The usual length of the body appears 
to be about 15”"", with an extent 104’"”'; but- the species 
occasionally attains a considerably greater size, as the 
length may rise to 22”™ and the extent to 154”"". Similar 
gigantic specimens from the Kara Sea have also been 
investigated by Hansen. 
The body (see PI. XII, fig. 3) is, upon the whole, 
uncommonly powerful arid robust, and completely justifies 
the designation „robustum“ chosen for the species. This 
applies especially to the trunk (fig. 3 a, 3 b), which is 
exceedingly plumply built, and greatly tumefied at the 
middle. The segments are very distinctly defined from 
each other, with their posterior edges distinctly prominent 
both above and below, which, when the animal is viewed 
latterally, gives to the contours a somewhat serrated 
appearance. The lateral processes are 'short and thick, 
almost claviform, and are only separated by very narrow, 
* fissured intervals. On their upper sides, as well as on 
the segments of the trunk, they are roughened by ex- 
tremely minute microscopical spines. The cephalic seg- 
