227 



De 3 bagreFodpar er noget mindre kraftigt udviklede 

 end hos foregaaende Art. forøvrigt af den sædvanlige Byg- 

 ning. 



Den rudimentære Bagkrop (se Fig. 4 g—h) danner 

 kun et yderst Hilet knudeformigt Fremspring ved Enden af 

 sidste Kropssegment mellem Boden af sidste Fodpar. Ved 

 nøiere Undersøgelse viser dette sig at beståa ligesom af .'! 

 Valvler, en dorsal og 2 ventrale. Disse indeslutter mellem 

 sig Endeafsnittet at' Tarmen, der munder paaSpidsen med 

 en trekantet Aabning. Paa den nedre Side af de ventrale 

 Valvler sees 2 smaa knudeformige Fo.rtsatser, der forestiller 

 Rudimenter af et Par Lemmer. 



Hannen (Fig. 4 x) er betydelig større end Hunnen 

 og af mere langstrakt Kropsform. Navnlig er de 2 forreste 

 Segmenter kjendelig stærkere forlængede. Legemets Be- 

 væbning er derimod lidet afvigende, skjøndt Piggene idet- 

 hele synes noget mindre fremtredende. 



Iste Par Følere er betydelig stærkere forlængede end 

 hos Hunnen og mere end dobbelt saa lange som 2det Par. 

 Skaftets 2 ydre Led er indbyrdes næsten af ens Størrelse 

 og Svøben neppe halvt saa lang som Skaftet. 



2det Fodpar. der ligesom hos Hannen af foregaaende 

 Art udspringer fra den bagre Del af 2det Segment, er 

 temmelig uligt samme hos Hunnen. Haanden er særdeles 

 stor og af atlang Form samt i hegge Kanter tæt besat med 

 fine Cilier. Griberanden viser i Midten 2 dybe Indsnit 

 begrændsede af 2 triangulære Fortsatser, hvoraf navnlig 

 den forreste er meget stor. Foran det forreste og dybeste 

 Indsnit og lige under Endekloéns Insertion gaar Haanden 

 ud i 2 spidse Hjørner. 



Bagkroppen (Fig. 4/,' — /) er forholdsvis noget mindre 

 rudimentær end hos Hunnen, og de 2 knudeformige Appen- 

 dices paa. den nedre Side er her udviklede til et Par tyde- 

 lige 2-leddede og tæt børstebesatte Lemmer. Umiddelbart 

 foran Bagkroppen udgaar fra sidste Kropssegments Bugside 

 2 koniske Fortsatser. som forestiller de ydre Kjønsvedhæng. 



Farven er hos hegge Kjøn ensformig graahvid, uden 

 nogen tydelig Pigmentering. 



Længden af den ægbærende Hun er 14""". Hannen 

 opnaar en Længde af indtil 20""". 



Forekomst og TJdbredning. Denne characteristiske 

 Art er under Expeditionen observeret paa ikke mindre end 

 6 forskjellige Stationer, alle tilhørende den kolde Area; 

 Dybden fra 350 til 74.3 Favne. Paa enkelte af disse Sta- 

 tioner forekom den i store Mængder. Det sydligste Punkt. 

 hvor den er bleven observeret er i Færø-Shetlands-Renden, 

 paa hvilken Lokalitet den forst blev opdaget under den 

 engelske Lightning-Expedition, det nordligste Punkt (Stat. 

 343) ligger i Havet Vest af Spitsbergens Sydpynt. 



The 3 posterior pairs of legs are somewhat less power- 

 fully developed thau is the case with those in the preced- 

 ing s]»'cies; tur the rest, of the usual structure. 



The riidimentary alidoniinal division of the body (fig. 

 4 g — h) fonns hut an exceedingly small tuherculiform pro- 

 jection, at the extremity of tin' last body-segment, between 

 the hases of the last pair of legs. < hi closer examination, 

 this projection is found to eonsist. as it «viv. of 3 valves, 

 onc dorsal and 2 ventral. These valves enclose the terminal 

 section of the intestine, which opens at the extremity with 

 :\ triangled oritice. On the lower surface of the ventral 

 vahcs. are seen 2 small, tuherculiform prolations, thaf rep- 

 lesent the rudiments of one or two limhs. 



Tlic Mulr (fig. 4 ar) is considerablj larger than the 

 female, and exhibits a more elongate form of body. The 

 2 foremost segments are in particular appreciably more 

 produced. On the other hand. the armature of the body 

 (leviates hut little. thougli the spikes would. mi the whole. 

 appear to he less proniinently developed. 



The Ist pair of antenna- are mucli more elongate 

 than in the female. and upwards of double the lengte of 

 the 2nd pair; the 2 outer joints of the peduncle occur al- 

 most equal in length, and the flagellum is scarcebj half as 

 lon;: as the pe hincle. 



The 2nd pair of legs. which. as in the male of the 

 preceding species, issne from the posterior part of the 2nd 

 segment, diller considerably from those in the female. The 

 hand is exceedingly large, oblong in form. aud delicatelj 

 eiliate along both margins. The palmar margin exhibits 

 in the middle 2 deep incisions, bounded by 2 triangular 

 projections, of which the foremost in particular is verj 

 large. Anterior to the foremost and deepest incison, and 

 immediately beneath the origin "f the terminal cia w. the 

 hand juts forth as 2 sharp corners. 



The posterior division of the body (rig. 4 A'— /) is, by 

 comparison. somewhat less rudimentary than in the female. 

 and the 2 tuherculiform appendages on the lower side are 

 developed as a pair of distinct two-jointed and densely 

 bristle-beset limbs. Immediatel] anterior to the posterior 

 division of the body, proceed from the ventral surface of 

 the last body-segment 2 conical prolations. tliat represent 

 the outer generative appendages. 



Colour in both sexes a uniform irreyish-white. with- 

 out distinct pigmentation. 



Length of the ovigerous female 14""". The male at- 

 t.iins a length of 2(1""'. 



Oecurrenee and Distribution. — This characteristic 

 species «as tåken mi the Expedition at as many .as ti dif- 

 ferent Stations. all belonging to the cold area. Depth 

 ranging from 350 to 743 fathoms, At several of these 

 Stations the animal occurred in great abundance. The 

 most southerly point at which it has hitherto been observed 

 is the Færø-Shetland channel, the locality where the form 

 was first met with (on the Bnglish "Lightning" Expedition) ; 

 the most northerly point iStat. 343) la> -ome distance west 



of the southern extremity of Spitzbergen. 



.hi* 



