der hver har en dyb Indbugtning fortil ner Spidsen. 
Langs Forkanten findes en Del meget smaa_ haar- 
formige Borster, der synes at vere Foleredskaber, 
da der til enhver af dem gaar en fin Nervetraad. 
Overleben (Fig. 1, L, Fig. 4 og 5) har Formen 
af en bred, nesten firkantet Lap, der nedad rager 
ud over Kindbakkernes Tyggedel. Paa Indsiden af 
denne Lap er der en langsgaaende, delvis haaret 
Forhgining, der ender bagtil i en frit fremragende, 
verticalt stillet Lob af smalt tungedannet Form (se 
Fig. 4 og 5). 
Kindbakkerne (Fig. 1, M, Fig. 6) har den for 
Branchipodiderne characteristiske Bygning, og ender 
med en fint riflet Tyggeflade, uden tydelige tand- 
formige Fremspring. 
Forste Par Kjever (Fig. 1, m', Fig. 7) har den 
bladformige Endedel af betydelig Storrelse og besat 
paa den tvert afkuttede Ende med en tet Rad af 
omkring 24 indadkrummede Borster af en lignende 
Beskaffenhed som de hos Branchinecta. 
Andet Par Kjever (Fig. 1, m*, Fig. 8) er for- 
holdsvis smaa og idethele af en simplere Bygning 
end hos Branchinecta, uden tydelig Adskillelse mel- 
lem Basal- og Endedel. De er i den ydre, noget 
udvidede Del tet haarede og har kun 2 cilierede 
Borster feestede til det indre Hjorne samt en bety- 
delig mindre simpel Borste i den indre Kant, om- 
trent i Midten. 
Branchialfodderne er 19 Par i Antal, svarende 
til de 19 Kropssegmenter. Naar undtages sidste 
Par, er de alle af ens Bygning og viser alle de 
Dele, som ovenfor er adskilte hos Branchinecta, 
hvortil endnu kommer en egen Plade ved Basis paa 
den ydre Side, hvoraf der intet Spor er at opdage 
hos hin Slegt. Det forreste Par (Fig. 9) er noget 
mindre end det 2det (Fig. 10), de folgende noget ner 
af ens Storrelse indtil omtrent det 12te Par, hvor- 
efter de successivt aftager i Storrelse bagtil. Paa 
dem alle er selve Stammen, eller Endopoditen, meget 
bred, pladeformig, med den forreste Flade noget 
hvelvet. Dens yderste Lap er meget stor og nesten 
_tvert afkuttet i Enden, samt kantet med sterke 
Borster, hvoraf dog ingen som hos Branchinecta, er 
kloformige. De 3 oventil folgende Lappe er ser- 
deles smaa og tet sammentrengte, af konisk Form, 
og hver besatte med 2—3 lengere og et Par kortere 
Borster. Den nestoverste Lap er kun utydeligt 
__skilt fra den overmaade brede, halvmaaneformige 
basale Lap, og begge kantede med en tet og regel- 
messig Rad af meget lange og leformigt krummede 
Borster, alle tydeligt leddede paa Midten. Exopo- 
_ diten er forholdsvis liden, og har Formen af et ovalt 
_ Blad, forbundet med den ydre Del af Endopoditen 
ved et tydeligt Led. Den er kantet med sterke, 
cilierede Borster, hvoraf de fra Enden udgaaede er 
lengst. Epipoditen er af et lignende Udseende som 
which each have a deep notch in front, near the 
point. Along the front edge there is a number of 
minute hair-like bristles, which appear to be sen- 
sory organs, as a fine nerve-fibre runs to each one. 
The labrum (figs. 1, L, 4 and 5) has the form 
of a broad, almost square lobe projecting down- 
wards over the masticatory part of the mandibles. 
On the inner side of this lobe, there is a longitudi- 
nal, rather hairy prominence, which ends posteriorly 
in a freely-projecting, vertically-placed lobe of a 
narrow, linguiform shape (see figs. 4 and 5). 
The mandibles (figs. 1, M and 6) are of the 
structure characteristic of the Branchipodide, and 
end in a finely-fluted masticatory surface without 
any distinct dentiform projections. 
The lamelliform terminal portion of the first 
pair of maxille (figs. 1,m?+and 7) is of considerable 
size, its abruptly truncated end being furnished 
with a close row of about 24 inward-curving bristles 
of the same structure as those in Branchinecta. 
‘The second pair of maxille (figs. 1, m* and 8) 
are comparatively small and, on the whole, of a 
simpler structure than in Branchinecta, without any 
distinct separation between the basal and the ter- 
minal parts. In the outer, somewhat expanded 
part, they are densely hairy, and have only 2 cili- 
ated bristles attached to the inner corner, and one 
much smaller, simple bristle at about the middle of 
the inner margin. 
There are 19 pairs of branchial legs, correspon- 
ding to the 19 segments of the body. With the 
exception of the last pair, they are all of a uniform 
structure, and exhibit all those parts which have 
been already distinguished in Branchinecta, with the 
addition of a peculiar lamina at the base on the 
outer side, of which no trace is to be found in 
that genus. The foremost pair (fig. 9) is somewhat 
smaller than the second (fig. 10), the succeeding pairs 
being of almost uniform size until about the 12th 
pair, after which they successively decrease in size 
posteriorly. In all of them the stem, or endopodite, 
is very broad, lamellar, with the anterior surface 
somewhat convex. Its outermost lobe is very 
large and almost abruptly truncated, besides being 
edged with strong bristles, none of which, however. 
are claw-like as in Branchinecta. The 3 succeeding 
lobes above are exceedingly small and closely 
crowded, conical in shape, and each armed with 2 or 3 
long, and a couple of shorter bristles. The upper- 
most lobe but one is only slightly separated from 
the exceedingly broad, crescent-shaped, basal lobe, 
and both are edged with a close, regular row of 
very long and falciform bristles, all distinctly jointed 
in the middle. The exopodite is comparatively 
small and of the shape of an oval leaf, united to 
the outer part of the endopodite by a distinct arti- 
culation. It. is edged with strong, ciliated bristles, 
