kloen rued 2 Knuder ved Roden. De 3 bagerste Fodpar 
tynde og forlaengede, sidste Par laengst. Parven gidhvid, 
marmoreret med rpdbrunt. Laengden 6 — 7 mm . 
216 
Findested. Magdalenebay (Spitsbergen). 
Bemserkninger. Ved naermere at conferere medBoeck’s 
Amphipodevaerk, maa jeg nu anse denne af mig tidligere som 
ny op forte Art for identisk med den af Boeck under Be- 
naevnelsen D. tuberculata beskreme Art, hvorfor det aeldre 
Navn her er bibeholdt. Da baade Text og Afbildninger i 
Boeck’s Vierk her, som i mange andre TilfVelde, laderineget 
tilbage at onske, vedfoies nedenfor on udforlig Beskrivelse 
af Arten, affattet efter Exemplarer indsamlede (under Ex- 
peditionen. 
Beskrivelse af Hunnen. Legemet er (se PI. XVII, 
Pig. 6) af den for Slfegten characteristiske spinlde Porm; 
dog noget mere undersffitsigt end hos enkelte af de ovrige 
bekjendte After. Det er i Modsastning til hvad Tilfteldet 
er lios den typiske Art, 1). spinosissima Kroyer, ganske 
ubevsebnet, uden Pigge eller Fortsatser. 
Hovedet er noget laengere end de 2 forste Segmenter 
tilsammen og gaar fortil ud i en over' Roden af 1 ste Par 
Pplere fremragende konisk Spids eller Pandehorn. Dets 
Sidekanter er noget bugtede, uden dog at vise noget tyde- 
ligt Hjorne. 
Af F orkroppens Segmenter er det lste ganske kort, 
det 2det omtrent dobbelt saa langt, medens de 2 derpaa 
folgende er betydelig storrc end nogen af de ovrige og 
danner oventil hos den segbrnrende Hun en temmelig stserk 
Hvadvning. De 2 sidste Segmenter er som hos Slfegten s 
ovrige Arter sammensmeltede til et enkelt Stykke af samme 
Storrelse og Porm som det foregaaende Segment. 
Bagkroppen er smrdeles sma.1, omtrent halvt saa lang 
som Porkroppen og kun sammensat af 5 Segmenter. De 
3 forreste er ganske korte, medens 4de Segment er stmrkt 
foilfenget og meget tyndt. 
Epimererne er smaa og af skjaeldannet Form, storst 
paa de 3 midterste Segmenter. 
0inene er vel udviklede og af betydelig Storrelse, cir- 
kelrunde samt stserkt convexe. Deres Pigment er af en 
dyb morkerod Farve. 
Polerne er sferdeles tynde og forlfengede samt i den bagre 
Kant temmelig sparsomt forsynede med korte Borsteknipper. 
lste Par er som saedvanlig laengst og lige udstrakte mesten 
af Legemets Lrnngde. Skaftets lste Led er temmelig tykt, 
men betydelig kortere end Hovedet, medens de 2 folgende 
Led er sferdeles tynde og forlsengede samt omtrent af ens 
Storrelse. Svoben er ubetydelig laengere end Skaftets sidste 
Led og bestaar af 5 — 6 temmelig utydeligt begraendsede 
Led, hvoraf det lste er lamgst. Bisvoben er meget liden 
og tvnd, 3-leddet. 2det Par Polere har Skaftets 2 sidste 
base with a straight, mucroniform. downward-directed pro- 
cess; terminal claw with 2 protuberances at base. The 3 
posterior pairs of legs slender and elongate, last pair longest. 
Colour yellowish-white, marbled over with reddish-brown. 
Locality. — Magdalena Bay (Spitzbergen). 
Remarks. — Having carefully referred to Boeck’s 
work on Ampbipods, I must now hold this species, which 
1 had previously established as new, to be identical with 
the form described by Boeck as D. tuberculata ; where- 
fore the elder designation is here retained. Meanwhile, 
as both letter-press and figures — in this case as frequently 
elsewhere throughout Boeck’s work — leave much to be 
desired, I have given below a detailed description of the 
species, worked up from specimens collected on the Ex- 
pedition. 
Description of the Female. — The body (see Ph 
XVII, fig, 6) exhibits the slender form characteristic of 
the genus, though a trifle more thickset than in some of 
the other known species. Unlike what is the case in the 
typical species, D. spinosissima Kroyer, it is quite unarmed, 
having neither .spikes nor spiniform projections. 
The head is somewhat longer than the 2 first, seg- 
ments taken together, and juts out anteriorly, above the 
bases of the 1st pair of antennae, as a conical point, or 
rostrum. Its lateral margins are somewhat flexuous. without 
ho wever exhibiting any distinct corner. 
Of the pedigerous segments, the 1st is quite short, 
the 2nd about twice as long, whereas the 2 succeeding ones 
are much longer than any of the others, and form above- 
in the ovigerous female, a somewhat prominent arch. The 
2 last segments, like those in the other species of the genus, 
are grown together in one piece, uniform as to size and 
form with the preceding segment. 
The posterior division of the body is exceedingly 
slender, about half as long as the anterior, and composed 
of only 5 segments. The foremost 3 are quite short, 
whereas the 4th segment is greatly produced, and very 
slender. 
The epimera are small, and squamiform in shape - — 
largest on the 3 median segments. 
The eyes are w r ell developed and of considerable size, 
circular- and prominently convex. Their pigment is ® 
dark-red. 
■ The antennae are exceedingly slender and elongate, 
as also, on the posterior margin, rather sparingly furnished 
with short fascicles of bristles. The 1st pair is, as usual, 
longest, and, when fully extended, almost equal to the body 
in length. The 1 st joint of the penduncle is somewhat thick 
though much shorter than the head, whereas the 2 suc- 
ceeding joints are very slender and elongate, as also well- 
nigh equal in size. The flagellum is but slightly longer 
than the last joint of the peduncle, and consists of 5 or 6 
somewhat indistinctly defined articulations, of which the 1st 
