udgaar et besynderligt, sterkt forlenget Vedheng 
(Tab. ILI, Fig. 1, p), som ifolge sit Udspring aaben- 
bart representerer en eiendommeligt modificeret 
Palpe. Den bestaar af en noget tykkere, med en 
Del tynde Muskelbundter fyldt Basaldel, og en tynd 
Endesnert, som dog begge gaar ganske umerkeligt 
over i hinanden. Basaldelen, der paa 2 forskjellige 
Steder har et Bundt af tynde divergerende Borster, 
viser strax ved sit Udspring en abrupt dobbelt 
vinkelformig Boining udad og bagtil, hvorfor den 
tynde, nesten bersteformige Endedel bliver rettet 
skraat bagtil og opad langs Siderne af Truncus, 
rekkende med sin Spids lige op til dennes dorsale 
Flade (se Tab. II, Fig. 1, m'). Langs den ene Kant 
af denne Endedel er med korte Mellemrum festet 
circa 16 lange og tynde, ucilierede Borster og til 
Spidsen 3 lignende; alle Borster viser i Enden en 
eiendommelig, nesten korketreekkerformig Krumning 
og er temmelig stive, samt vende ialmindelighed 
nedad og indad. Angaaende dette eiendommelige 
Vedhengs Function, er der ingen Tvivl om, at det 
tjener til at rense Rygskjoldets Hule, og dermed 
ogsaa de tandre Branchialfedder, for fremmede i den 
indtreengende Dele, i Lighed med hvad Tilfeeldet er 
med det bagre Fodpar hos visse Ostracoder (Cypri- 
dinider, Cyprider). 
2det Par Kjever (Tab. II, Fig. 1 og 7, m?, Tab. 
III, Fig. 2) er udpreget pladeformige og af temme- 
lig compliceret Bygning, mest mindende om samme 
hos de heiere Crustaceer (Podophthalmia). Man kan 
paa dem adskille en af 2 utydeligt begrendsede 
Segmenter bestaaende Basaldel og 2 fra denne fortil 
udgaaende Grene. Basaldelen har indad 4 borste- 
besatte Lappe, der utvivlsomt svarer til Tyggelap- 
pene paa Iste Par, med den Forskjel, at hver Tygge- 
lap her altsaa er dobbelt eller delt i to. Den for- 
reste af disse 4 Lappe er imidlertid meget liden, 
knudeformig og berer 6 lange, cilierede Borster. De 
3 evrige Lappe er ligeledes borstebesatte paa den 
tvert afkuttede Ende; men Borsterne er her meget 
kortere og tettere samt delvis ordnede i flere Rek- 
ker. Den midterste af disse 3 egentlige Tyggelappe 
er betydelig smalere end de 2 ovrige, som omtrent 
indbyrdes er af ens Storrelse. Af de 2 Endegrene 
er den indre (p), der forestiller Endognathen eller 
Palpen, af betydelig Storrelse, noget afsmalnende 
mod Enden og delt i 2 vel begreendsede Led, hvoraf 
det Iste er storst. Begge Led er i Inderkanten be- 
_ satte med talrige cilierede Borster, delvis ordnede i 
2 Rekker, og en af de fra Spidsen udgaaende ud- 
merker sig ved betydelig Lengde. Den ydre Gren 
(ex), eller Exognathen, er betydelig mindre end den 
indre og rekker neppe udover dennes Iste Led. 
Den har Formen af en meget smal elliptisk Plade, 
der langs hele Inderkanten og Spidsen er forsynet 
3 — G. 0. Sars: Fauna Norvegiz. 
17 
ally of about the same size. 
a number of short spines. From the extremity of 
these maxille a strange, greatly prolonged appen- 
dage issues (Pl. III fig. 1, p.) which judged by its 
origin evidently represents a peculiarly modified 
palp. It consists of a somewhat thickish basal part 
occupied by a number of thin bundles of muscles, 
and a slender terminal lash which, however, pass 
imperceptibly the one into the other. The basal part, 
which in two different places lias a bundle of slender 
divergent bristles, exhibits, ifimediately at its origin, 
an abrupt double-kneed bend outwards and back- 
wards, which causes the thin, almost setiform ter- 
minal part to become directed obliquely backwards, 
and upwards along the sides of the truncus reaching, 
with its point, quite up to its dorsal surface (see 
Pl. II, fig. 1 m’). Along the one margin of this 
terminal part there are secured at short inter- 
vals, about 16 long, slender, non-ciliate bristles, 
and 3 of the same kind at the tip: all the brist- 
les exhibit at the extremity a peculiar, almost cork- 
serew-shaped bend and are rather stiff, and generally 
turn downwards and inwards. Reyarding the func- 
tion of this peculiar appendage, there is no doubt 
that it serves to clean the cavity of the carapace, 
and at same time the delicate branchial legs of 
foreign, to it penetrating, substances, like what is 
the case with the posterior pair of legs in certain 
Ostracods (Cypridinids, Cyprids). 
The 2nd pair of maxille (Pl. II, fig. 1 and 7, m?; 
Pl. IIT fig. 2) are of distinguished lamelliform shape, 
and of rather complex structure, reminding one most 
of the same maxille in the higher crustaceans (Po- 
dopthalmia). We can in them distinguish a — of 2 
indistinctly defined segments constructed — basal 
part, and two branches issuing from it in front. 
The basal part has, inwards, 4 lobes beset with 
bristles which indubitably correspond to the masti- 
catory lobes of the ist pair, with this difference, 
that each masticatory lobe is here double or bifur- 
cated. The foremost of these 4 lobes is, however, 
very small, nodiform, and carries 6 long ciliated 
bristles. The 3 remaining lobes are also beset with 
bristles on the obtusely truncated extremity; but 
the bristles are here much shorter and closer and, 
also, partly arranged in several series. The mesial 
one of those. 3 masticatory lobes proper is consider- 
ably narrower than the 2 others, which are mutu- 
Of the 2 terminal 
branches, the inner one (p) which represents, the 
endognath or the palp, is of considerable size, dimi- 
nishing somewhat towards thie extremity, and divided 
into 2 well defined joints, of which the Ist one is 
the largest, Both joints are on the inner margin 
beset with numerous ciliated bristles, partly arranged 
in 2 series, and one of them issuing from the point 
distinguishes itself by its great length. The outer 
branch (ex), or the exognath, is considerably smaller 
