den indre og betydelig sterre Gren svarer til Molar- 
processen. Den forste er ganske simpel og har kun 
strax indenfor Spidsen et yderst lidet tandformigt 
Fremspring. Den sidste er af cylindrisk Form, lidt 
buet, og har som sedvanlig Enden fint riflet samt 
mere tvert afkuttet paa hoeire end paa venstre 
Kindbakke. Palpen (Fig. 1, 7, Mp, Fig. 10), der ud- 
gaar fra Corpus noget fortil paa det Sted, hvor 
Tyggedelen forbinder sig med den ydre, baadformige 
Del, er af serdeles betydelig Storrelse, nesten 3 
Gange saa lang som selve Corpus, og viser en Byg- 
ning idethele overensstemmende med samme hos 
hoiere Crustaceer, navnlig Amphipoderne. Den be- 
staar af 3 skarpt begreendsede Segmenter eller Led, 
alle omtrent af ens Sterrelse, eller kun ganske lidt 
tiltagende i Leengde udad. 1ste Led er simpelt cylin- 
driskt, dog noget fortykket i hver Ende, og mangler 
ganske Borster. Det forbinder sig med 2det Led 
paa en ganske egen Maade, saa at begge med hin- 
anden danner et Slags Knee. 2det Led er i sit ba- 
sale Parti noget opsvulmet og danner umiddelbart 
indenfor Ledfoiningen med iste, en albuformig Ud- 
vidning. Det afsmalnes successivt mod Enden og 
har i Midten af Yderkanten 3—5 tynde Borster. 
Sidste Led, der er meget bevegeligt forbundet med 
Zdet, er temmelig smalt, sterkt. sammentrykt fra 
Siderne og ganske lidtbredere i sit ydre Parti, som 
er jevnt tilrundet i Enden. Det berer langs den 
nedadvendte skarpe Kant en tet Rad af fint cili- 
erede, toleddede Borster og har desuden ved Spid- 
sen nok en Rad af meget fine og sterkt krummede 
Borster. Leddets svre Kant mangler Borster, men 
viser i sit bagre Parti en serdeles fin Ciliering. 
I sin normale Situs convergerer de to Palper sterkt 
ved Basis (se Fig. 10), saa at 2det Led paa begge 
kommer til at ligge tet sammen i Juxtaposition, 
indenfor Basalleddene af de 2 Par Folere. Sidste 
Led paa hver divergerer igjen noget og treeder frit 
frem enten foran eller mellem Folernes Rod (se 
Fig. 1, Mp). ° ; 
Iste Par Kjever (Tab. I, Fig. 1 & 7, m', Tab. 
II], Fig. 1) er af afrundet Form og gaar indad ud 
i to korte, stumpt afrundede Tyggelappe, hvoraf den 
ydre er storst, nesten af oxedannet Form og, foruden 
med nogle tildels cilierede Berster, beveebnet i sit 
bagre Parti med en Gruppe af smaa, i Enden tve- 
delte Torner (Fig. 1a). Den indre Tyggelap er for- 
holdsvis liden, af membranes Beskaffenhed og paa 
den nesten tvert afkuttede Ende forsynet med en 
tet Rad af seerdeles fine cilierede Borster, foruden 
en Del korte Torner. Fra Enden af disse Kjever 
i] 
16 
small triangular lamella, which corresponds to the 
denticular portion (cutting edge) in other Crusta- 
ceans; while the inner, considerably larger ramus. 
corresponds to the molar expansion. The first-named 
is quite simple, and has, immediately inside the point, 
only an extremely small dentiform prominence. The 
last-named is cylindrical in form, slightly curved, 
and, as usual, has the extremity finely fluted and 
more obtusely truncated on the right than on the 
left mandible. The palp, (fig. 1, 7, Mp. fig. 10), 
which issues from the corpus a little in advance 
of the place where the masticatory part is con- 
nected to the outer navicular- part, is of parti- 
cularly large size, almost 3 times as long as the 
corpus itself, and exhibits a structure corresponding, 
upon the whole, with that of the higher Crustaceans, 
especially the Amphipods. It consists of 3 sharply 
defined segments or joints, all of about the same 
size, or only quite slightly increasing in length out- 
wards. The 1st joint is simple cylindric in form but. 
somewhat tumefied at each extremity, and is quite 
devoid of bristles. It is connected to the 2nd joint 
in quite a peculiar manner, so that they form with 
each other a kind of knee. . The 2nd joint is some- 
what tumefied in its basal part, and forms imme- 
diately inside the articulation to the 1st joint an 
elbow-shaped expansion. It diminishes gradually 
towards the extremity, and has 4—5 slender brist- 
les on the middle of the outer margin. The ter- 
minal joint, which is very flexibly connected to the 
2nd one, is pretty narrow, strongly compressed from 
the sides and quite slightly broader in its outer 
part, which is evenly rounded at the extremity. It 
bears along the downward bent sharp margin a 
close series of delicate double-jointed bristles, and 
has, further, at the point, yet another series of very 
delicate and strongly bent bristles. The upper mar- 
gin of the joint has no bristles, but exhibits a parti- 
cularly delicate ciliation in its posterior part. In 
its normal situs the 2 palpi converge strongly at 
the base (see fig. 10), so that the 2nd joint of each — 
lies in close juxtaposition inside the basal joints — 
of the 2 pairs of antenna. The terminal joint of 
each diverges again a little, and appears freely 
forward either in front of or between the bases of 
the antenne (see fig. 1, Mp). 
The 1st pair of maxille (Pl. LI, figs 1 and 7, 
m!; Pl. III, fig. 1) are rounded in form and pass over, 
inwards, into two short, obtusely rounded mastica- 
tory lobes, of which the outer one is the largest, 
almost securiform, and armed, besides with some 
partly ciliate bristles, also, in its posterior part, 
with a group of minute spines bifurcated at the ex- 
tremity (fig. 1a). The inner masticatory lobe is 
relatively small, of membranous nature, and fur- 
nished on the. almost obtusely truncated extremity 
with a close series of delicate ciliate bristles besides 
