af en tyk muskulos Basaldel og en med denne be- 
vegeligt forbunden og strkt indboiet Endedel. 
Denne sidste har Formen af et triangulert Blad, 
der paa sin frie, lige afskaarne Rand er besat med 
en Rekke af stive Borster, tiltagende i Lengde 
indad. Enhver Borste bestaar (Fig. 7) af en noget 
tykkere Basaldel besat i den ene Kant med grove 
Pigge, og en i en fin Spids udlobende, og i begge 
_ Kanter tet cilieret Endedel. — Andet Par Kje- 
8) er langtfra saa kraftigt udviklede og ° 
_ synes heller ikke ifolge sin Stilling at kunne spille 
ver (Fig. 
nogen vesentlig Rolle ved Neringsoptagelsen. De 
udspringer (se Fig. 1, m’) lidt bag 1ste Par og er, 
ganske i Modsetning til hine, rettede udad. Basal- 
delen har paa den nedre Side 3 tykke Fjerborster. 
Endedelen synes kun at vere lidet bevegelig og 
viser en noget oval Form. Dens udadvendte Side 
er tet besat med’ stive, kort cilierede Borster, der 
staar i flere Reekker og divergerer til alle Sider. 
Den forreste Borste er noget grovere end de ovrige 
og festet i nogen Afstand fra disse til et kort 
Fremspring. 
_ Branchialfodderne (se Tab. VII, Fig. 9—13) er 
alle udpreget bladformige og af temmelig bred Form, 
med den forreste Flade noget hvelvet og den ba- 
gerste mere eller mindre concav. Man kan paa dem 
adskille de samme Hoveddele, som allerede ovenfor 
er beskrevne paa Branchialfodderne hos Nebalia. 
Basaldelen eller Stammen er af aflang Form og 
_neeten ens Brede overalt. I dens Indre sees for- 
skjellige hinanden delvis krydsende Muskelbundter, 
der dels tjener til at boie selve Stammen, dels vir- 
ker paa de forskjellige Vedheng. Stammens ydre 
Kant er noget fortykket og viser ved Basis nogle 
svage Ind- og Udbugtninger som en Antydning til 
en Slags ufuldsteendig Leddeling. Dens indre Kant 
er delt i 5 korte Lappe, de saakaldte Enditer, hvoraf 
den bagerste, eller overste, er meget bred og langs 
sin halymaaneformigt buede Rand besat med en tet 
Rad af kamformigt ordnede og sterkt .krummede 
Borster, alle fint cilierede og bestaaende af 2 tyde- 
lige Led (se Fig. 10). De ovrige Lappe er meget 
mindre, nesten af mammilledannet Form, og besat 
med lignende krummede Borster, samt desforuden 
foran dem med et Knippe betydelig grovere saa- 
danne. Endopoditen (end), der danner den umiddel- 
bare Fortsettelse af Stammen, er forholdsvis ganske 
kort og har Formen af en bred trianguler, noget 
indadrettet Plade, besat langs Yderkanten med stzrke 
Fjerborster, der ved Spidsen og langs den indre 
Kant efterhaanden antager Charaecteren af korte 
Torne, cilierede kun i den ene Kant. Exopoditen 
(ex), der er bevegeligt articuleret til en sa#regen 
Afsats af Stammen ved Ydersiden af Endopoditen, 
47 
‘branchial feet of Nebalia. 
pair (Pl. VII, fig. 6) consist of a thick, musculous 
basal part, and a strongly incurved terminal part 
connected movably with it. The last-named has the 
form of a triangular lamella which, upon its free, 
straightly truncated margin, is beset with a series of 
stiff bristles, increasing in length inwards. Each 
bristle (fig. 7) consists of a somewhat thicker basal 
part, beset on the one edge with coarse spikes, and 
a terminal part which runs out in a fine point and 
is closely ciliated on both edges. — The second pair 
of maxille (fig. 8) are far from being so power- 
fully developed, and neither do they, from their 
position, appear to play any material part in the 
securing of nourishment. They issue (see fig. 1 m.®) 
a little behind the 1st pair, and are, quite in con- 
trast to them, directed outwards. The basal part 
has 3 thick plumose bristles on the lower side. The 
terminal part appears to be only little mobile, and 
exhibits a somewhat oval form. Its outwardly turned 
side is closely beset with stiff, short ciliated bristles 
placed in several series, and divergent to all sides. 
The foremost bristle is somewhat coarser than the 
others, and is attached at some distance from them 
to a short projection. 
The branchial feet (see Pl. VII, figs. 9—13) are 
all prominently foliaceous and of pretty broad 
form, with the foremost surface somewhat convex, 
and the backmost one more or less concave. We 
Scan distinguish in them the same chief parts, as 
have already been described above concerning the 
The basal part or stem 
is of an oblong shape, and almost uniform in breadth 
throughout. In its interior may be seen various 
bundles of muscles partly traversing each other, 
which serve partly to bend the stem itself, partly 
act on the various appendages. The outer edge of 
the stem is somewhat thickened, and at the base ex- 
hibits a few faint in- and out- curvatures, as an 
indication of a kind of imperfect articulation. Its 
inner edge is divided into 5 short lobes, the so-called 
endites, of which the backmost or uppermost one 
is very broad, and along its semi-lunary arcuate 
margin is beset with a close series of strongly 
curved bristles arranged like a comb, all finely cili- 
ated and consisting of 2 distinct joints (see fig. 10). 
The other lobes are much smaller, almost mammilli- 
form in shape, and beset with similar curved brist- 
les, and besides, in front of them, with a fascicle of 
considerably coarser sete. The endopodite (end) 
which forms the immediate continuation of the stem, 
is, comparatively, quite short, and has the form of a 
broad triangular, somewhat incurved plate, beset 
along the outer edge with strong plumose sete, 
which at the tip and along the inner edge succes- 
sively assume the character of short spines, ciliated 
only. on the one edge. The exopodite (ex) which is 
