89 
Mundarea, og i Midten endog delvis griber over hinanden 
( se ^ 'S' 2). De udspringer vidt adskilte nser Sidekanterne 
ai Hovedsegmentet (se Fig. 3) og bestaar kun af 2 tydelige 
8egmenter. Det yderste at disse er ganske lidet og at oval 
bvorimod det Iste er overordentlig stort, dannende 
en ^ rtH l hvcelvet Plade af afrundet triangular Form og laags 
^ eiJ * Q dre starkt buede Rand forsynet med en regelmsssSig 
Had af Fjmrborster. I Midten af Pladen Andes 3 meget 
bdnefaldende kalkagtige Concretioner. der giver disse PladeT 
en betydelig Grad af Fastlied. De her ombandlede Lemmer 
maa egentlig, som Frf. Dohrn rigtigt bemserker. betragtes 
som eiendommeligt modiflceret Fodpar. tilherende det 
rudnnentaere mellem Hovedet og Kroppen beliggende Seg- 
n >ent. Da de imidlertid saavel hvad Bygning som Stilling 
angaar nsermest slutter sig til Mundpartiet, kan de passende 
enaevnes acoessoriske Kjsevef 0 dder. 
Af egentlige Fodder Andes som bos de ovrige Arter 
al Slaegten kun 5 Par. Disse er (Fig. 9) af kraftig Byg- 
tset besatte med lange Burster og delvis med grove 
T sender. Af de 5 Led er det Iste storst og omtrent saa 
an "t som de 3 folgende tilsammen. Sidste Led danner med 
^ foregaaende en meget bevsegelig Articulation og bferei 
1 Spidsen en kraftig, krummet Klo. 
Det enkle Kjgnsvedhamg, der er beliggende (se Fig. 2) 
fa a Ventralsiden ved Enden af Forkroppen og stottet af 
SHla l Chitinliste. er meget lidet. neppe fremragende. 
Bagkroppens Buglemmer (Fig. 10) bestaar af en kort 
asaldel og 2 smalt tuugeformige Grene, hvoraf den indie 
ei i-engst. Begge Grene mangier etbvert Spor at Burster, 
0g <lisse Lemmer kan folgelig heller ikke fungere som Svpinme- 
,e dskaber. hvorimod Structuren af Endepladerno snarere 
S ' llf>s antyde, at <le staar i Respirationens Tjeneste. 
Halevedhaengene (Fig. 1 1) danner som bos de ovrige 
d denne Gruppe horende Former en fuldstamdig Halevifte. 
Det midterste Halevedhseng. der egentlig forestiller 
^dste Bagkropssegmeut, er omtrent saa langt som de 4 
01 * "naende 8egmenter tilsammen og ved Basis ligesaa bredt 
0Dl disse; den ydre Del er imidlertid meget smal, nsesten 
(wicetdannet med stump tilspidset Ende. Langs Kanterne 
•gesom paa den owe Flade Andes talrige Smaapigge; der- 
Im °d mangier de smdvanlige Endeborster. 
De ydre Halevedhseng er adskilligt kortere end det 
‘alters t e , til Avis Basis de er indleddede, og bestaar at en 
^ 0rt> U1 en bred Basaldel, der indad gaar ud i en tunge- 
01 aiig Flig, 0 g 2 smalt ovale Endeplader. hvoraf den indre 
' 1 ddt storre end den ydre. Begge Plader viser i Kanterne 
en Del uregelmsessige tandformige Fremspring og er desudeu 
Enden i den indre Kant forsynede med nogle tynde 
c dierede Burster, li vis Antal er storst paa den indre Plade. 
h arven er hvidagtig med et tydeligt blaaligt Skjser. 
v e l)l0 dere liudngtige Partier mellem Segmenterne og paa 
‘mtralsiden viser en dyb morkeviolet Farvetone. 
Lamgden gaar op til fulde 12”™, og den er saaledes 
IJen ”" ! 'ske Nordhavsexoedition. G. O. Snrs: Cnistacea. 
! buccal area, and in the middle even overlapping each other 
(see Ag. 2). They take their origin, widely apart, in chise 
proximity to the lateral margins of the cephalic segment 
(see Ag 3). and consist of only 2 distinct segments, ti e 
outermost quite small and oval in form, whereas the other 
is exceedingly large, constituting a broad, arcuate plate, 
rounded-triangular, and furnished along its inner, exceed- 
ingly vaulted margin with a regular series of plumose bristles. 
In the middle of the plate, occur 3 very conspicuous cal- 
careous concretions, that give to these plates considerable 
firmness. The appendages treated of here must, too, strictly, 
as Professor Dohrn with just appreciation observes, be regarded 
as a peculiar. modiAed pair of legs, belonging to the rudimentary 
segment placed between the head and the Arst free segment. 
Meanwhile, since, as regards alike their structure and their 
position, they approximate closest the buccal region, they 
may not improperly be termed accessory maxillipeds. 
Of legs, in a strict sense, there occur, as in the other 
species of the genus, only 5 pairs. These are (Ag. 9) powerful 
in structure, closely beset with long bristles, and furnished 
in places with coarse teeth. Of the 5 joints, the 1st is the 
largest, and about as long as the following 3 taken together. 
The last joint constitutes, along with the preceding one, 
a very mobile articulation, and bears at the point a powerful, 
curving claw. 
The simple sexual appendix placed (see Ag. 2) on the 
ventral side, at the extremity of the anterior division, and 
strengthened by a slender cliitiuous Allet. is exceedingly 
small, and projects but very slightly. 
The pleopoda (Ag. 10) consist of a short basal portion 
and 2 slender, linguiform branches. On neither of the branches 
can a trace of bristles be detected; and hence, too. these 
appendices, are unadapted to perform the function of natatory 
organs; nay. judging from the structure of the terminal plates, 
they would rather appear promotive oi respiration. 
The caudal appendages (Ag. 1 1) form, as in the other 
species belonging to this group, a, true caudal fan. 
The median caudal plate, representing, strictly, the last 
abdominal segment, is about as long as the 4 preceding segments 
taken together, and at the base equal in breadth to the latter; 
the outer portion, however, is exceedingly narrow, almost 
lanceolate, with an obtusely pointed extremity. Along the 
margins, as also on the upper surface, occur numerous mi- 
nute spikes, whereas the usual terminal bristles are wanting. 
The outer caudal appendages are a good deal shorter 
than the telson, to the base of which they are jointed, 
and consist of a short, and broad basal portion, jutting out 
inward as a linguiform lappet, and 2 slenderly ovate term- 
inal plates, of which the inner is a trifle larger than the 
outer. Both plates exhibit along the margins a number of 
dentiform projections, and. moreover, are furnished toward 
the extremity, on the inner margin, with a few slender ci- 
liated bristles, greatest in number on the inner plate. 
Colour whitish, with a distinct shade of blue. The 
softer cutaneous parts between the segments and on the 
ventral side have a deep, dark-violet tinge. 
Length reaching fully 12”"”; hence, this animal is 
12 
