133 
\ 
^ >aa ^ e t Par (Fig. 13) or de 2 ydre fingerformige Fort- 
^atser staerkt forlaengedc og de paa deni fsestede Burster 
lorholdsvis smaa. 
Kjsevefedderne (Fig. 14), der for on stor Del dsekkor 
' 1 la fe e Munddelo nedentil (se Fig. 3), er af pladedannet, 
niembranes Beskaffenhed og ganske gjennemsigtige. Basal- 
1 f k*n bestaar af 2 skarpt markeredo Segmenter, hvoraf det 
S1 dste er stprst og uoget udvidet. Den fra dette Segment 
lncad u«lgaaende Tyggelap er ganske snail, tungedannet og 
' * c Pnden farsynet mod korte Borster. Palpen bestaar af 
0 Udelige Led, hvoraf 2 det og 3die er stserkt udvidede, 
P adeformige og indbyrdes forbundne ved en meget skjiev 
U t ur> Be 2 sidste Led er pludselig betydelig smalere og 
1 '("Her tilsammen en Slags ufuldkommen Sax, idet det lprste 
( l'‘iu indad gaar ud i en fingerformig Lap, imod hvilken 
snnde ydre Led kan indboies. AUeLed er i Kanterne 
nisjnede med talrige korte Borster. Den pladeformige 
pignath ei* af bred lancetdannet Form og nekker med sin 
onitrent til Midten af Palpens 2 det Led. 
lste Fodpar (Fig. 15) er af meget svag Bygning og 
L 1 udstrakt neppe af mere end Legemets halve Lrnngde. 
er ialmindelighed (se Fig. 2 og 3) boiet ind under den 
°i ioste Del af Kroppen, saa at Enden ligger mere oiler 
"dndre i Contact med Munddelene, hvorfor ogsaa dets Func- 
10 n nsermest maa antages at vsere den, at hjselpe til at 
’Pngo Fodemidlerne til Munden, skjondt det ifolge sin 
.'fening ikke forestiller virkelige Griberedskaber. Det be- 
S aar soin de folgende Fodpar af 5 Led, hvoraf 4de er 
<yu fest og ligesorn de 2 foregaaende i sin indre Kant tot 
but cilieret. Sidste Led der tiled hint danuer en mere 
01 miiidre stierk knaeformig Boining, er neppe lialvt saa 
nngt 0 g saerdeles smalt, og Endekloen ligeledes ussedvanlig 
Jl .det udviklet. 
Be 3 folgonde Fodpar (se Fig. 1) er soiu bos Stog- 
ie 1 * 0v,- ige Arter stmrkt forkengede og forestiller de egent- 
Lo Garigfodder. De er alle af ens Udseende, natsten dob- 
*■ Saa lange som Legemet, og har de 3 forste Led ganske 
v(Ut( ', hvorimod de 2 ovrige er saerdeles lange og tynde, 
llu ‘d talrige korte og stive Borster i Kanterne. Endekloen 
1 Paa de 2 forste Par (Fig. 16) leformig krummet, paa 
Sl dste p ar (Pig, ] 7) nmsten ret. 
Be 3 bagre Par Fodder (Fig. 18) er af et belt for- 
s ’j<‘lligt Udseende og i Lighed med hvad Tilfseldet er hos 
1 ovn ge til denne Familie horende Former, omdannede 
kral'tige Svommeredskaber. Alle 3 Par er af fuldkom- 
11111 ens Udseende, mere eller mindre stserkt Sformigt bpi- 
< e °fe udmaerkede ved den eiendommebge Form af de 2 
r< ' Bed, der er stserkt, aarebladformigt udvidede og langs 
anterne torsynede med en trot Rad af Fj Berbers ter. Det 
0ls b‘ at disse Led er naesten hjerteformigt, det an det kun 
U ( 'l mindre og af regebnsessig elliptisk Form. Begge Led 
comparatively small and slender. On the 2nd pair (fig. 13), 
the 2 outer dactyliform projections are greatly produced, 
and the bristles attached to them comparatively small. 
The maxillipeds (fig. 14), that to a great extent cover 
the rest of the oral appendages (see fig. 3), are lamelliform, 
membranous, and quite translucent. The basal part consists 
of 2 sharply defined segments, of which the latter is the 
larger of the two, and somewhat dilated. The masticatory 
lobe, proceeding inwards from that segment, is very slender, 
linguiform, and furnished at the extremity with short bristles. 
The palp consists of 5 distinct articulations, of which the 
2nd and 3rd are greatly dilated, lamelliform, and connected 
together by an exceedingly oblique suture. The 2 last 
articulations become abruptly narrower, constituting a kind 
of imperfect chela, the first jutting forth inward as a dac- 
tyliform lobe, against which the delicate outer articulation 
admits of being bent in. All the articulations are furnished 
along the edges with numerous short bristles. The lamelli- 
form epignath is broadly lanceolate, reaching with its 
point almost to the middle of the 2nd articulation of the 
palp. 
The 1st pair of legs (fig. 15) are exceedingly feeble 
in structure, and, when fully extended, measure scarcely, 
if at all, more than half the length of the body. They 
are, as a rule (see figs. 2, 3), bent in under the foremost 
part of the body, their extremities being thus brought more 
or less in contact with the oral appendages; and hence 
their chief function must be regarded as subservient in 
conveying food to the mouth, though, according to their 
structure, they can not represent true prehensile organs. 
They consist, like each of the succeeding pairs, of 5 
articulations, of which the 4th is longest, and, like the 2 
preceding ones, are densely and finely ciliated along the 
outer margin. The last joint, that, together with the 
4th, constitutes a more or less strong geniculate bend, is 
scarcely half as long as the latter, and exceedingly slender, 
the development, too, of the terminal claw being unusually 
slight. 
The 3 succeeding pairs of legs (see fig. 1) are, as in 
the other species of the genus, greatly produced, and rep- 
resent the true pereiopoda. They are all uniform in ap- 
pearance, well-nigh twice as long as the body, and have 
the 3 first articulations quite short, whereas the 2 others 
are exceedingly long and slender, with numerous short and 
stiff bristles along the edges. The terminal claw on the 
2 first pahs (fig. 16) is falciform, on the last pair (fig. 17) 
almost straight. 
The 3 posterior pairs of legs (fig. 18) are widely dif- 
ferent in appearance, and, like those in the other forms 
belonging to this family, transformed into powerful natatory 
organs. All 3 pairs are perfectly uniform in appearance, 
curved more or less prominently into the shape of the letter 
S. and characterized by the .peculiar form distinguishing 
the 2 outer articulations, which are greatly dilated, in the 
form of an oar-blade, and furnished along the margins with 
a close series of plumous bristles. The first of these artic- 
ulations is almost cordiform, the other, but little smaller 
