39 
Iste Par Foleres Skaft (Pig. 5— 6 ) er kort og tykt, 
af nrestcn cylindrisk Form og neppe opnaaende '/* af Ryg- 
skjoklets Lsengde. Dets lste Led er storst, af noget uregel- 
lmessig Form og paa den ydre Side forsynet med et ganske 
kort tornformigt Fremspring, hvorfra en Pad af brtiede 
Fjserborster strmkker sig bagtil. De 2 folgende Led er 
betydelig kortere og smalere end lste og omtrent indbyrdes 
af samme Storrelsc ; det sidste meget skraat afskaaret i 
Retningen indenfra udad. De 2 Svober er t stserkt udviklede, 
den indre ganske tynd og af Legemets halve Lsengde, den 
ydre betydelig kengere, nresen af hele Legemets Lsengde 
og ved Basis stserkt opsvulmet samt her tset besat med de 
smdvanlige baandformige Sandseborster. 
2det Par Folere er ikke som hos de i det toregaaeude 
omtalte Former fsestede i samme horizontale Plan med lste 
Par, men betydelig laverc, hvorfor beggePar trseder tydeligt 
frem, naar Dyret sees i Protil (se Fig. 2 ). Den korte og 
tykke, utydeligt segmenterede Roddel (se Fig. 7) gaar paa 
den ydre Side ud i en kun lidet fremspringeude trekantet, 
i Randen borstebesat Fortsats og bar paa den indre Side 
en smal indadrettet Torn (spina, oljactona). 
Det bladdanncde Yedhseng (se Fig. 7) er vel udviklet, 
omtrent 1 / 3 laengere end lste Par Foleres Skaft og af aflang 
Form, med den stprste Brede, der omtrent er lig */ 3 af 
Laengden, paa Midten, den ydre Kant ganske lige, den indre 
stferkt udbuet. Enden er smalt afstumpet og ligesom hele 
den indre Kant besat med en tset Rad af Fjserbprster. 
Ved Bladets ydre Hjorno staar et ganske kort tandformigt 
Fremspring. 
Svpben er overordentligt udviklet, navnlig hos Hannen 
(se Fig. 1 ), hos hvem den opnaar mere end Legemets dob- 
belte Lsengde. Dens Skaft (se Fig. 7) er tykt og muskul- 
est, bestaaende af 3 Led, hvoraf det sidste er storst. 
Overlseben (Fig. 8 ) danner en noget hjelmformigt frem- 
springende kjodet Lap af uregelmsessig firkantet Form, paa 
hvilken kan adskilles en stoi’re hvmlvet median Del og 2 
smalere Sidefloier. 
Underlseben (Fig. 9) er dybt tvekldi’tet, med Sidelap- 
perne udvidode mod Enden, som er tvsert afkuttet og i det 
ydre Hjorne spidst udtrukken. Langs den indre Kant er 
disse Lapper fint cilierede; derimod er den ydre og forreste 
Rand ganske glat. 
Kindbakkerne (Fig. 10 ) er kraftigt udviklede og bar 
den indad mod Munden vendte Del, ligesom hos Pasiphae, 
sta?rkt pladeformigt udvidet, med Tyggeranden tilskjmrpet 
og delt i et stort Antal smaa spidse Tagger. Bagtil viser 
denne Del et noget fortykket og med jevnere og tmttere 
Smaatsendcr bevsebnet Parti, der svarer til Tyggeknudeu 
hos andre Macrurer. Hoire og venstre Kindbakke skiller 
sig torovrigt ved nsermere Eftersyn noget i Henseende til 
Tyggerandens Beskaffenhed. Paa venstre Side er den nem- 
lig tydelig vinklet, medens den paa hoire er mere jevnt 
The peduncle of the 1st pair of antennse (figs. 5, 6 ) 
is short and thick, almost cylindric in form, attaining 
scarcely one-fourth of the length of the carapax. Its 1st 
joint is largest, somewhat irregular in form, and furnished 
on the outer side with an exceedingly short, spinil'orm 
projection, from which a series of curved, plumose bristles 
extend posteriorly. The 2 succeeding joints are considerably 
shorter and narrower than the 1 st, and about equal in 
size; the last is very obliquely truncate, from within to 
without. The 2 flagella are strongly developed; the inner 
quite slender and half the length of the body, the outer 
considerably longer, almost equalling the whole body in 
length, and at the base exceedingly tumid, as also densely 
beset with the usual riband-shaped sensory bristles. 
The 2nd pair of antennm are not, as in the forms 
previously treated of, attached in the same horizontal plane 
with the 1 st pair, but are placed considerably lower down; 
and hence both pairs can be distinctly seen when the animal 
is viewed in profile (see fig. 2). The short and thick, in- 
distinctly segmented basal portion (see fig. 7) extends, on 
the outer side, as a slightly projecting, triangular prolation, 
beset with bristles along the margin, and has on the inner 
side a slender, inward-directed spine (spina olfadoria). 
The squamiform appendage (see fig. 7) is well developed, 
about one-third longer than the peduncle of the 1 st pair 
of antennse, and oblong in form, having its greatest breadth, 
which about equals one-third of the length, in the middle; 
the outer margin quite straight, the inner very considerably 
arched. The extremity is slender - obtuse, and, like the 
whole of the inner margin, beset with a closely arranged 
series of plumose bristles. In the outer corner of the scale 
occurs an exceedingly short, dentiform projection. 
t 
The flagellum is remarkably developed, more partic- 
ularly in the males (see fig. 1 ), attaining upwards of twice 
the length of the body. Its peduncle (see fig. 7) is thick 
and muscular, composed of 3 articulations, the last being 
the largest. 
The labrum (fig. 8 ) forms a somewhat galeate-pro- 
jecting, fleshy lobule, of an irregular, quadrate form, on 
which can be distinguished a larger, arcuate median portion 
and 2 narrower lateral wings. 
The labium (fig. 9) is deeply cleft, with the lateral 
lobules dilated toward the extremity, which is abruptly 
truncate, and in the outer corner produced to a point. 
Along the inner margin, these lobules are finely ciliated, 
whereas the outer and anterior margin is perfectly smooth. 
The mandibles (fig. 10) are powerfully developed, and 
have, as in Pasiphae, the part turning in toward the mouth 
lamelliform dilated, with the cutting edge sharpened, and 
divided into a great number of small acute teeth. Posteriorly, 
this part exhibits a somewhat inspissated region, armed with 
smaller and more closely arranged denticles, corresponding 
to the molar protuberance in other Macrurans. The right 
and left mandibles differ somewhat, on closer examination, 
as regards the character of the cutting edge. On the 
left side, the latter is perceptibly angular, while on the 
