64 
omvendt flaskedannede Form. Dets forreste Halvpart, der 
indeliolder Endeafsnittet af Tarmen, er af cylindrisk Form, 
medens Eudepartiet er stserkt afsmalnende og til kver Side 
bevmbnet med 9 smaa Toraer foruden de to noget stprre 
fra Spidsen udgaaende (se fig. 3). 
De ydre Halevedhmng er kun ubetydelig lmngere end 
det midterste og liar Basaldelen eller Stammen sserdeles 
tynd og forlsenget samt i den indre Kant forsynet med smaa 
Torner. Endegrenene (se Fig. 4) er ganske korte. neppe 
balvt san lange som Stammen og indbyrdes omtrent af ens 
S tor r else. Den indre er dolkformig og delt i 3 tvdelige 
Led. hvoraf det lste er lsengst. Til den indre Kant af 
denne Gren er fsestet ialt 10 korte Torner, hvoraf 4 til- 
borer lste. 3 etlivert af de 2 fplgende Led. Sidste Led 
gaar ud i en staerk tornformig Spids. Den ydre Gren er 
noget smalere end den indre og som ssedvanlig 2-leddet med 
Basalleddet ganske kort, Endeleddet lineasrt og i den ydre 
Kant samt ved Spidsen forsynet med nogle tynde Bprster. 
Dyrets Farve var i levende Tilstand, navnlig paa 
Forkroppen, blegt kjodrod. 
Lfengden af det erboldte Individ, maalt fra Spidsen 
af Pandehornet til Enden af det midterste Hal eved Feng, 
er 18”"", og Arten barer altsaa til de storste af Slaegten. 
Forekomst og Udbredning. Det beskrevne Exem- 
plar blev under Expeditionens sidste Togt optaget i Bund- 
skraben fra et Dyb af 125 Favne i Ha vet lige i Yest for 
Isijorden paa Spitsbergen. 
Om Artens geografiske Udbredning kau selvfplgeligt 
intet med Bestemthed an fores. Dog er man ifolge Finde- 
stedets lioie nordlige Brede berettiget til at antage, at den 
ligesom den nserstaaende D. spimdosa Heller, er en segte 
arktisk Form. 
Ordo Isopoda. 
Trib. 1. Chelifera. 
Fam. 1. Apseudidse. 
Gen. Sphyrajms, Forman, M. S. 
(G. O. Sars, Bevision af Gruppen Isopoda chelifera). 
Slsegtscharaeteristik. Legemet bagtil afsmalnende 
med skarpt afsatte Segmenter, lios Hannen betydelig smsek- 
rere end hos Hunnen. Hovedsegmentet stort. oventil jevnt 
slender, inverted bottle-shape form. Its foremost half, con- 
taining the terminal section* of the intestine, is cylindric. 
whereas the terminal portion tapers abruptly, and, on 
either side, is armed with 9 small spines, exclusive of 
the two somewhat larger ones proceeding from the point 
(see fig. 3). 
The outer caudal appendages are but very little longer 
than the telson, and have the basal part, or stem, exceedingly 
slender and elongate, as also furnished along the inner 
margin with small spines. The terminal branches (see fig. 4) 
are quite short, scarcely half as long as the stem, and well- 
nigh uniform in size. The inner is dagger-shaped, and divided 
into 3 distinctly defined joints, of which the first is longest. 
To the inner margin of this branch are attached 10 short 
spines. 4 of which belong to the 1st joint and 3 to each of the 
2 succeeding ones. The last joint juts out as a strong, 
spiniform point. The outer branch is a little more slender 
than the inner, and, as usual, two-jointed, with the basal 
articulation quite short, the terminal joint linear, and furnished 
along the outer margin, as also at the point, with a few 
slender bristles. 
The colour of the animal in a living state, more 
especially on the anterior division of the body, was a light- 
red, or pink. 
The length of the specimen taken, measured from the 
tip of the rostrum to the extremity of the telson, is 18”"", 
and the species ranks therefore among the largest of the 
genus. 
Occurrence and Distribution. — The specimen de- 
scribed above was brought up in the dredge, on the last 
cruise of the Expedition, from a depth of 125 fathoms, in 
the open sea. due west of Ice Sound, Spitzbergen. 
As regards the geographical distribution of the species', 
nothing can of course be stated with certainty. Judging, 
however, from the high northern latitude of the locality in 
which the animal was found, we are warranted in regarding 
it, equally with the species D. spimdosa Heller, as a true 
Arctic form. 
Ordo Isopoda. 
Trib. 1 . Chelifera. 
Fam. 1. Apseudidse. 
Gen. Spliyrapus, Norman, M. S. 
iG. 0. Sars. Eevision af Gruppen Isopoda chelifera), 
Generic Character. — Body tapering posteriorly, with 
sharply defined segments, and much more slender in the male 
than in the female.. Cephalic segment large, uniformly arched 
