38 
ikke som kos hin Slsegt sammentrykt fra Siderne. For- 
kroppen indtager omtrent 1 / :! af Totallsengden, og Bag- 
kroppen afsmalnes kurtigt og jevnt kagtil. 
Alle Integumenter er i en ganske paafaldende Grad 
tynde og boielige, nsesten ganske mexnkranpse, hvorfor Dyret 
vanskeligt kikekolder sin Form uforandret, med mindre det 
behandles med den storste Yarsomked, 
Rygskjoldet er forholdsvis af ketydelig Storrelse og 
dsekker Forkroppen fuldstaencligt. Det er jevnt kvselvet, 
med Hoide og Brede omtrent ens og Lamgden omtrent 
dokkelt saa stor. Yed svagt markerede Linier antydes for- 
skjellige Regioner paa samme. Af disse er den i den for- 
reste Del keliggende Maveregion tydeligst og noget kaevet 
samt ved en skarpt udprseget Linie til kver Side adskilt 
fra 2 mindre Sidefelter, Leverregionerne. Langs ad Midten 
er den forsynet med en tydelig Kjol. der i sin forreste Del 
er kevaeknet med 4 — 6 smaa, fremadrettede Trnnder. Fortil 
lober denne Kjol ud i et meget kort, sammentrykt og i 
Enden spidst udtrukket Pandehorn, kvis nedre. noget buede 
Kant er ganske glat. 
De forreste Kanter af Rygskjoldet riser under Pande- 
kornet et lidet Indsnit for 0inene, kvilket begrsendses neden- 
til og udad af en triangular Flig (Infraorbitaltornen). N eden- 
for denne igjen bemserkos 2 meget smaa tandformige Frem- 
spring, hvoraf det eue ligger til Siderne af 2det Par F oleres 
Roddel (Antennaltoruen). medens det andet indtager det 
nedre Hjorne af Rygskjoldet (Pterygostomialtornen). De 
nedre Kanter af Rygskjoldet er jevnt buede og den bagre 
Rand oventil i Midten kun meget svagt udrandet. 
Bagkroppen er (se Fig. 2) oventil jevnt kvaelvet, uden 
Spor af nogen Kjpl og uden at noget af Segmenterne kan 
siges at vajre pukkelformigt fremspringende. Dens 5 forreste 
Segmenter er forsynede med tynde tilrundede Epimerer, 
der viser et lignende Forhold som kos de egentlige Carider, 
idet lste Par skyver sig noget udover Rygskjoldets Side- 
flqier, medens 2det Par delvis dmkker saavel det foregaa. 
ende som efterfolgende Par. De 3 fprste Par Epimerer 
er kos Hunnerne som ssedvanlig betydelig sterre og bredere 
end kos Hannerne. Sidste Segment er meget smalt og 
omtrent saa langt som de 2 foregaaende tilsammen. 
0inene (Fig. 3) er forkoldsvis smaa og ufuldkomment 
udviklede. De er meget smale og nsesten af konisk Form, 
idet de, uligt livad tilfieldet pleier at vajre kos andre Ma- 
crurer, kar sin storste Tykkelse ved Basis, kvorfra de af- 
smalnes jevnt og kurtigt mod Enden. Paa denne bemajrkes 
den meget Idle, tilrundede egentlige 0ieglob, der er forsynet 
med ganske lvst, opakt hvidt Pigment. Selve Synselemen- 
terne synes at vsere ganske rudimentsere, og den 0iengloben 
udvendigt beklsedende Hud viser kun en svagt udpraeget, 
uregelmsessig netformig Structur som en Antydning til Fa- 
cettering (Fig. 4). Ved Grsendsen mellem den egentlige 
0ieglob og 0iestilken findes fortil et lidet knudeformigt 
Fremspring. 
almost round, not compressed from tke sides as in tkat genus. 
Tke anterior division of tke body measuring about one- 
tkird of tke total lengtk, and the posterior division tapering 
rapidly and uniformly backward. 
All the integuments are remarkably tbin and flexible, 
nay almost membranaceous ; and lienee tke animal will 
rarely retain its form unchanged unless handled with the 
greatest care. 
Tke carapax is comparatively large, covering the whole 
of the anterior division of tke body. It is uniformly arched, 
with tke height and breadth a, bout equal, and tke length 
well-nigli twice as great. Faintly marked lines indicate 
divers regions on tke surface. That occupying the anterior 
part, viz. tke gastric region, is most distinctly marked, 
and somewhat prominent, as also cut off by a sharply 
defined line from 2 smaller lateral areas — tke hepatic 
regions. Along the middle, it is furnished with a distinct 
keel, which, on its anterior part, has from 4 to 6 small, 
anteriorly directed teeth. In front, this keel protends as 
an exceedingly short, compressed, and, at the extremity, 
acutely produced rostrum, of which the lower, somewhat 
arched, margin is perfectly smooth. 
The anterior margins of the carapax exhibit under 
the rostrum a small incision for the eyes, bounded without 
and below by a triangular lobule (infraorbital spine). Be- 
neath this lobule, are observed 2 exceedingly small denti- 
form projections, one placed at the side of the basal por- 
tion of the 2nd pair of antennm (antennal spine), the other 
occupying the lower corner of the carapax (pterygostomial 
spine). The inferior margins of the carapax are uniformly 
arcuate, and the posterior margin, above, in the middle, is 
but very slightly emarginate. 
The posterior division of the body (see fig. 2) uni- 
formly arched above, without the slightest trace of a keel, 
and without any one of the segments, in a strict sense, being 
hunched and projecting. The 5 anterior segments are 
furnished with thin, rounded epimera, exhibiting a similar 
relation to that in the true Caridians, the 1st pair project- 
ing somewhat over the lateral wings of the carapax, while 
the 2nd pair partially overlap alike the preceding and the 
succeeding pairs. The 3 first pairs of epimera are as usual 
considerably larger and broader in the females than in the 
males. The terminal segment is exceedingly narrow, and 
in length about equal to the 2 preceding ones taken together. 
The eyes (fig. 3) are comparatively small, and imper- 
fectly developed. They are exceedingly narrow, and almost 
conical in shape, having, contrary to what is generally the 
case in other Macrurans, their greatest thickness at the 
base, whence they taper gradually and rapidly toward the 
extremity. Here is observed the exceedingly small, rounded 
ocular sphere, furnished with a very light, opaque, whitish 
pigment. Even the elements of vision would appear to be 
quite rudimentary, and the skin investing the ocular sphere 
exhibits but a faintly defined, irregular, reticulate (fig. 4). 
instead of the regular areolate, structure generally observed. 
On the boundary-line between the cornea and the stalk of 
the eye. occurs anteriorly a small tuberculiform projection. 
