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18
med Dohrn at antage, at de 2 smaa ovenfor omtalte
torn-formige Fremspring paa den ovre Side af Hovedsegmentets
Pandedel repræsenterer et ubetydeligt Rudiment af de hos
Larverne tydeligt udviklede Saxlemmer, ligesom en
buefor-mig Chitinliste paa Siderne af dette Segments Halsdel (se
Fig. 3 a) antyder det Sted, hvor hos Larverne de til
Folerne svarende Lemmer har havt sin Plads.
De falske Fadder (Fig. 3 f). der som hos foregaaende
Slægt kun er tilstede hos Hannerne (se Fig. 3 c, 3 d), er
forholdsvis betydelig kraftigere udviklede end hos denne
Skegt og lige udstrakte mere end halvt saa lange som hele
Legemet. Som hos andre Pycnogonideer er de fæstede paa
hver Side til et knudeformigt fra Hovedsegmentets Halsdel
udgaaende Fremspring, umiddelbart foran Legemets forreste
Sidefortsatser, og er hoiede ind under Kroppen, visende
en udpræget S-formig Krumning. De er kun sammensatte
af 7 Led, meget ulige i Længde og besatte med korte,
som oftest hageformigt omboiede og uden nogen Orden
tordelte Torner. Hvad Leddenes indbyrdes Forhold angaar,
saa er det lste forholdsvis kort og tykt, hvorimod 2det er
stærkt forlænget, niere end dobbelt saa langt. De 2
følgende Led er igjen adskilligt kortere og tilsammen neppe
betydelig længere end 2det, 5te derimod mere forlænget,
skjondt kortere end 2det, og meget stærkt krummet. 6te
Led er af oval eller elliptisk Fonn og har ved Enden en
skaalformig Fordybning, fra hvis Bund det yderst lille 7de
eller sidste Led rager frem. Dette er af trekantet Form
og uden Klo, men forsynet i den indre Kant med 2 korte
Torner af samme Beskaffenhed som de øvrige paa disse
Lemmer fæstede.
Gangfødderne (se Fig. 3) er særdeles spinkle, næsten
3 Gange længere end Legemet, og besatte med spredte
Torner af noget ulige Størrelse. 2det Hofteled er
temmelig stærkt forlænget, mere end dobbelt saa langt som de 2
øvrige tilsammen og noget indknebet ved Basis. Det har
paa Undersiden nær Spidsen hos begge Kjøn en hos
Hunnen større, hos Hannen betydelig mindre Aabning til
Udtømmelse af Kjønsstoffene; hos Hannerne synes dog disse
Aabninger ganske at mangle paa lste Fodpar. Laarleddet
er af betydelig Størrelse, omtrent dobbelt saa langt som
hele Hoftepartiet, og gaar ved Spidsen paa den ydre Side
ud i en konisk, med 2 ulige lange Torner bevæbnet
Fortsats. Hos Hunnen er dette Led mere eller mindre
opsvulmet paa Grund af de i dets Indre sig udviklende Æg
og har paa Midten 2 skraat overfor hinanden stillede
temmelig stærke Torner, lste Lægled er kortere end
Laarleddet, hvorimod 2det er omtrent at samme Længde som
dette, begge af lineær Form og besatte med temmelig
ligelig udviklede Torner. Tarsalleddet (se Fig. 3 b) er
særdeles lidet og meget bevægeligt forbundet med foregaaende
Led. Det er af uregelmæssig afrundet Form, stærkt
udrandet i Enden og udad springende frem i en smal, med
2 smaa Børster besat Lap; dets indre Kant er stærkt ud-
reason to assume with Dohrn, that the 2 small spiniform
projections mentioned above, oil the upper surface of the
frontal portion of the cephalic segment, represent a slight
rudiment of the ehelifori. distinctly developed in the larvæ, as
also an arched chitinous tillet on either side of the
neck-part of that segment (see fig. 3 a) indicates the place
whence, in tile larvæ, the limbs corresponding to the palpi
had their origin.
The false legs (fig. 3 f), which, as in the preceding
genus, are present in the males only (see figs. 3 c, 3 d),
have relatively a much more powerful development
than in that genus, and measure, fully extended, upwards
of half the length of the whole body. As in other
Pycnogonids, they are affixed oil either side to a knob-shaped
projection issuing from the neck-part of the cephalic
segment, immediately anterior to the first pair of lateral
processes of the body, and are bent in under the trunk,
exhibiting a marked S-shaped curve. They are composed of
only 7 joints, very unequal in length, and beset with short
spines, as a rule utiguifonn-recurvous, and distributed
without any order whatever. Concerning the relative size
of the joints, the 1st is comparatively short and thick,
whereas the 2nd is very considerably produced, nay more
than twice as long. The 2 succeeding joints, again, are a
good deal shorter, and. taken together, hardly much longer
than the 2nd; the 5th on the other hand is more
elongate, though shorter than the 2nd. and very much curved.
The 6th joint is oval or elliptic in form, and has at the
end a bowl-shaped depression, from the bottom of
which the exceedingly small 7th, or terminal, joint is seen
to protrude. This joint is of triangular form and without
any claw, but provided on its inner margin with 2 short
spines, similar in character to the others affixed to those
limbs.
The ambulatory legs (see fig. .3) are remarkably
slender, almost 3 times longer than the body, and beset
with scattered spines of somewhat unequal size. The 2nd
coxal joint is a good ileal produced, more than twice as
long as the 2 others taken together, and somewhat constricted
at the base. On the under surface, it has, near the
extremity, iu both sexes, an opening, — for the female comparatively
large, for the male much smaller, — to evacuate the
generative matter; in the males, this opening would appear to
be entirely wanting on the 1st pair of legs. The femoral
joint is of considerable size, about double the length of
the whole coxal part, and protends at the point on the
outer surface as a conic projection, armed with 2 unequally
long spines. In the female, this joint is more or less
swollen, owing to the eggs in course of development within,
and exhibits moreover, placed obliquely opposite one
to the other, 2 rather powerful spines. The 1st tibial
joint is shorter than the femoral joint, whereas the 2nd is
about of the same length; both are linear in form and beset
with well-nigh equably developed spines. The tarsus (see
fig. 3 b) is exceedingly small, and very movablv connected
with the preceding joint. It has an irregular rounded
form, being deeply emarginated at the extremity, and
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