88 
Svpben or omtrent af samme Lsongde som Skaftets sidste 
Led og sserdeles tynd. Dens lste Led er raegot lidot saa 
at det let vil kunne oversees; derimod er do 2 iolgende 
Led temmelig forlsengede, og ethvert af deni lsengere end 
de 2 sidste Led tilsammen. Foruden nogle simple Burster 
er til Enden af hvert af de 3 sidste Led fsestet en klar 
stavformig Sandsebprste. 
Paa 2det Par Folere (Fig. 5) kan ligeledes adskilles 
Skaf't og Svebe; men Skaftct bestaar her af 5 Led. bvoraf 
de 3 forste er meget korte og del vis saugtakkede i Kan- 
terne, medens sidste Led ogsaa her er staerkt forlaeuget og 
ved Spidsen forsynet med 4 staerkt udviklede Hpreborster. 
Svoben er noget lsengere end Skaftets sidste Led og jevnt 
afsmalnende mod "Spidsen samt sammensat af 8 korte. med 
simple Burster besatte Led. 
De saakaldte Kindbakker (Fig. 6), der dog, som af 
Prof. Dohrn (1. c.) paavist. baade if'plge sin Stilling i For- 
hold til Mundaabningen og sin TJdvikling, neppe kan be- 
tragtes som bomologe med Kindbakkerne lios andre Cru- 
staceer. er fsestede til Hovedets forreste Rand og rager 
frit frem foran samme, idet de som Tsenger kan bevaeges i 
horizontal Retning imod hinanden. De er i Sammenligning 
med andre Arter ikke meget store, med ai' den sffidvanlige 
Form, noget indknebne ved Basis og pladeformigt udvidede 
mod Enden, med Spidsen leformigt indadkrummet og den 
iridre Kant tilskjserpet og gla.t. dannende paa Midten en 
fremstaaende Yinlcel. Ligeoverfor denne Yinkel bemserkes 
paa den ydre convexe Rand en liden, noget uregelmsessig 
Afsats som Antydning til et tandformigt Fremspring. 
Af andre Munddele er kun 2 Par tilstede, der er 
fsestede til det bagerste Parti af Hovedsegmentet og lige- 
ledes i betydelig Afstand fra selvc Mundaabningen. Denne 
sidste sees som en ubetydelig simpelt cirkelformig eller noget 
elliptisk Aabning omtrent i Midten af den fordybede Mund- 
area (se Fig. 3). 
Det ene af disse Par (Fig. 7) udspringer tset sammen 
ved den bagerste Del af Mundarean (se Fig 3) og dsekkes 
fuldstsendigt- af det 2det Par (se fig. 2). Saavel ifelge sin 
Beliggenhed som Bygning er det berombandlede Par Lem- 
mer at opfatte som de egentlige Kjsevefpdder, bvoraf altsaa 
fplger, at Kjaever ganske mangier. De er af bled og mem- 
branes Beskafi'enhed samt halvt gjennemsigtige og bestaar 
af en bred muskulps Basaldel, der paa den indre Side lobel- 
ia! i en.kort fingerformig Fortsats (Tyggelap), og en mod 
Spidsen noget afsmalnende Endedel eller Palpe. Denne er 
sammensat af 4 pladeformige Led eller Segmenter, bvoraf 
det 2det er storst. Alle disse Led er langs sin ydre Kant 
forsynede med en regelmsessig Rad af stserke, ndadboiede 
Fjserberster. 
Det 2det Par til Hovedsegmentet fsestede Lemmer 
(Fig. 8) viser et meget eiendommeligt Udseende, idet de 
som et Par msegtige Valvler hvselver sig over den bele 
the extremity, on one side. 2 so-called auditory bristles. 
The flagellum is about of the same length as the last joint 
of the peduncle, and remarkably slender. Its 1st joint is 
very small, so minute indeed as to be easily overlooked; 
on the other hand, the 2 succeeding joints are rather elongate, 
each being longer than the 2 terminal joints taken together. 
Exclusive of a few simple bristles, a pellucid, baculiform, 
sensory bristle is attached to the extremity of each of the 
3 terminal joints. 
On the 2nd pair of antennae (fig. 5), a peduncle and 
a flagellum can likewise be distinguished; but the peduncle 
consists of 5 joints, of which the 3 first are very short, 
and in part serrate along the margins, whereas the last joint 
is here, too, very considerably elongate, and at the point 
provided with 4 strongly developed auditory bristles. The 
flagellum is somewhat longer than the last joint of the 
peduncle, and tapers gradually toward the point: it consists 
of 8 short joints, beset with simple bristles. 
The so-called mandibles (fig. 6), which, however, as 
pointed out by Professor Dohrn (1. c.), both regarding their 
position relative to the buccal orifice and their general 
development, can scarcely be held as homologous with 
the mandibles in other Crustaceans, are attached to the 
foremost margin of the head, and project freely forward 
before it, admitting of being moved horizontally one toward 
the other, like a pair of forceps. They are, as compared 
with other species, not particularly large, but of the usual 
form, somewhat constricted at the base and lamelliform- 
dilated toward the extremity, with the point falciform-in- 
curved, and the inner margin sharp and smooth and forming- 
in the middle a protuberant angle. Opposite to this angle, 
is observed, on the outer convex margin, a small, somewhat 
irregular ledge, constituting a rudiment of the usual denti- 
form projection. 
Of other oral appendages 2 pairs only are present, 
attached to the hindermost part of the cephalic segment, 
and likewise at a considerable distance from the buccal 
orifice. The latter has the appearance of a small, circular, 
or somewhat elliptic, opening, placed about in the middle 
of the depressed buccal area (see fig. 3). 
One of these pairs (fig. 7) spring, close together — • 
and wholly covered by the 2nd pair (see fig. 2) — from 
the hindermost portion of the buccal area (see fig. 3). 
Both by reason of their position and their structure, the 
said pair of appendages must be regarded as the true max- 
illipeds; and hence maxillae are entirely wanting. They 
are soft and membranous in character, as also semi-translu- 
cent, and consist of a broad, muscular basal portion, which, 
on the inner side, juts out as a short, dactyliforni projection 
(masticatory lobe), and of a somewhat tapering terminal 
portion, or palp. The latter is composed of 4 lamelliform 
joints, or segments, of which the 2nd is largest. All these 
joints are furnished along their outer margin with a regular 
series of strong, outward-curving, plumose bristles. 
The 2nd pair of appendages (fig. 8), attached to the 
cephalic segment, present a very peculiar appearance, arching 
over as they do, like a pair of enormous valves, the whole of the 
