9 
Legemet er (se PI. I. fig. 1) af ualmindelig under- 
ssetsig og sammentrsengt Form, samt ved vel markerede 
Suturer delt i 6 paa hinanden Mgende Afsnit eller 8eg- 
menter, hvoraf det forreste forestiller Snabelen, det bager- 
ste H; desegmentet . Ethvert af de 4 midterste Segmenter 
udvider sig til Siderne til on kort og tyk, i Enden afkuttet 
Fortsats, hvortil Gangfodderne or fsestede. Disse laterale 
Fortsatsor er tffit sammentricngte og kun skilte ved yderst 
snmle, spaltformige Mellemrum, hvorfor Logemets Midtparti 
antager en temmelig bred, oval, noget nedtrykt Form. 
Dot bagerste Par af Sidefortsatserne er betydelig kortere 
end de ovrige og kun skilte bagtil ved et smalt Indsuit, 
fra hvis Bund Halesegmentet udgaar. Det forreste af de 
egentlige Kropssegmeuter, det saakaldte Hovedsegment, der 
egentlig maa opfattes som fremkommet ved on Sammen- 
smeltning af flere Segmenter, er som saidvanlig (let s tors to 
og omtrent dobbelt saa bredt som langt. Dog er det toi- 
reste Parti, eller Pandedelen, her langtfra saa udviklet 
som hos de fleste ovrige Pycnogonideer og uden nogen 
egentlig Hals. Det viser i Enden en kraveformig Fortyk- 
kelse, der ligesom omfatter Roden af Snabelen (se ogsaa 
Fig. 1 a og 1 f), og har oventil. i nogen Alstand fraFor- 
kanten en temmelig stmrkt fremspringende, men i Enden 
stumpt afrundet Knude (0ieknuden). Paa den Ovre Flade 
af denne Knude sees de 4 lindseformige Corneas, der med 
sit underliggende Pigment fremstiller Dyrcts Synsorganer. 
Disse Corneas er bos nasrvaerende Art meget srnaa og vidt 
adskilte, samt ordnede 2 og 2 paa fiver Side afMidtlinien 
(se Fig. 1 b). Bag Dieknuden Andes paa Logemets Rygside 
langs Midtlinien en Rmkke af 5 mere eller mindre fioie, 
stumpt koniske Fremspring (se Fig. .1 a), hvoraf do 2 til- 
horer Hovedsegmentet, ethvert af de ovrige et sserskilt 
Segment; de 3 midterste af disse Fremspring er altid de 
storste. Desuden Andes ved Enden af Logemets Sidefort- 
satser, ligeledes paa Rygsiden, en mere eller mindre tyde- 
lig stump Knude. Halesegmentet (se Fig. 1 c) er horizon- 
talt stillot og nsesten af spadedannet Form, stmrkt indkne- 
bet ved Basis og successivt udvidet mod Enden, dor er 
nsesten tvsert afkuttet eller med en neppe maerkelig \ inkel 
i Midten; (lets Lsengde er omtrent lig de 2 foregaaende 
Segmenter tilsammen. 
Snabelen (se Fig. 1, 1 a og If) udgaar i horizontal 
Retning fra Enden af Hovedsegmentet, dog saaledes, at 
dens Endeparti er svagt nedboiet (se Fig. 1 a). Den er 
omtrent halvt saa lang som det ovrige Legeme og ved 
Basis neppe meget smalere end den forreste Del af Hov ed- 
segmentet. Af Form er den udprmget konisk og temmelig 
stierkt afsmalnende mod Enden, med dot yclre Parti smalt 
udtrukket og af cylindrisk Form. Ovenfra eller nedenfra 
seet viser Snabelens Sidecontourer en svag dobbelt Ind- 
bugtning, som ogsaa er bemserket af Wilson. Paa Spidsen 
af Snabelen ligger Mundaabningen (se Fig. 1 f), som har 
den smdvanlige trekantede Form, men mangier tydeligt ud- 
viklede Lmbeplader. 
Den uorske Nordhavs«cpedition. G. O. Sars: Pyeaogonidsa. 
The body (see PI. I, fig- 1) is remarkably thickset 
and compact in form, and divided by well-marked sutures 
into 6 consecutive parts, or segments, the foremost ol 
which represents the proboscis, the hindmost the caudal 
segment. Each of the 4 median segments expand at the 
sides, forming a short and thick truncate process, to which 
the ambulatory legs are affixed. These lateral processes 
lie crowded together, with but exceedingly narrow, fissure- 
like intervals between; and hence the medial part of the 
body assumes a rather broad, oval, somewhat depressed 
form. The posterior pair of lateral processes are consid- 
erably shorter than the rest, and separated behind by only 
a narrow incision, from the bottom of which issues the 
caudal segment. The most anterior of the true segments of 
the body, the so-called cephalic segment, which, strictly, must 
be regarded as a fusion together, so to speak, of several seg- 
ments, is as usual the largest, and about twice as broad 
as long. Meanwhile the foremost or frontal part is in this 
animal far from being so developed as in most other Pyc- 
nogonids, and is also without any neck proper. It exhibits at 
the extremity a collar-shaped inspissation, encompassing, as it 
were, the base of the proboscis (see too fig. 1 a and fig. 
1 f.), and having above, at some distance from the front 
margin, a rather abruptly projecting, but at the extremity 
rounded knob (the oculiferous tubercle). On the upper 
surface of this protuberance are seen the 4 lenticular 
cornea', which, along with the underlying pigment, constitute 
the visual organs of the animal. In the present species, 
these cornea are exceedingly small and wide apart and 
arranged, 2 and 2 together, on each side of the medial line (see 
fig. 1 b). Behind the oculiferous tubercle, occurs on the dorsal 
side of the body, along the medial line, a. series of 5 more 
or less elevated, obtuse conical projections (see fig. 1 a), 
2 of which belong to the cephalic segment, each of the 
others to a separate segment; the 3 middlemost of these 
projections are invariably the largest. Moreover, at the 
extremity of the lateral processes of the body, likewise on 
the dorsal side, we observe a more or less distinct obtuse 
protuberance. The caudal segment (see fig. 1 c), placed 
horizontally, is almost spatulate in form, very much 
instricted at the base, and expands successively towards the 
extremity, which is nearly truncate or with a well-nigh im- 
perceptible angle in the middle; its length about equals 
that of the 2 preceding segments taken together. 
The proboscis (see fig. 1, 1 a and 1 f) issues, with 
a horizontal direction, from the extremity of the cephalic 
segment, though in such manner as to give its terminal 
part a slight downward bend (see fig. 1 a). It measures 
about half the length of the rest of the body, and is at 
the base very little if at all slenderer than the foremost 
part of the cephalic segment. It lias a marked conical 
form and tapers rather 'abruptly towards the extremity, 
with the outer portion slenderly produced and cylindrical 
in form. Viewed from above or from below, the lateral 
contours of 'the proboscis exhibit a faint twofold curvature, 
also noticed by Wilson. At the extremity of the probos- 
cis lies the buccal orifice (see fig. 1 f), which has the 
