52 
sit fuldstrendige Sset af Randburster, Det er, som det vil 
sees af sidstnsevnte Figur, stserkt forlamget, omtrent dobbelt 
saa langt som lste Par Fpleres Skai't, lancetdannet og rundt 
om alle Kanter besat med lange Fjaerb0rster. Spidsen 
er stumpt tilrundet og viser en tydelig Tvsersutur, hvoryed 
et kort Endesegimmt er afsat. 
Munddelene stemmer idetbele temmelig npie overens 
med samme bos Skegten Mysideis. 
Kindbakkernes Bevsebning er dog noget afvigende (se 
PI. Y, Pig. 14). Paa venstre Kindbakke Andes fortil 2 
tydeligt begrsendsede tandede Plader, og mellem deni og 
Tyggeknudeu er faestet 4 tykke, buiede og cilierede Burster ; 
paa huire er der derimod fortil kun en enkelt utydeligt 
tandet Plade. og mellem den og Tyggeknuden Andes intet 
Spor af Burster, men kun en simpel tilrundet Fremstaaenbed. 
Palpen (Fig. 15) er af betydelig Sturrelse og tret burste- 
besat ; dens 2det Led er meget stort og pladeformigt, medens 
sidste Led er forboldsvis kort og af oval Form. 
lste Par Kj sever (Fig. 16) har begge G-rene stserkt 
indbuiede, forpvrigt af ssedvanlig Bygning. 
2det Par Kjsever (Fig. 17) er forholdsvis smaa, med 
Basaldelen ganske kort og ligesom bos Slsegten Mysideis 
indad kun forsynet med 2 tydelige Tyggelapper. Exognathen 
er af smal triangular Form og langs sin ydre Kant besat 
med en Rad af stserke Fjserburster. Mesognathen er stserkt 
udviklet, med sidste Led meget stort og bredt, af uregel- 
msessig rliombisk Form og langs den ydre Kant forsynet 
med en Rad af 8 — 10 cilierede Burster. 
De to Par Kjsevefgdder (Fig. 18 og 19) er begge 
kra.ftigt udviklede og af temmelig ens Bygning, skjundt 2det 
Par (Fig. 19) er adskilligt storre end lste. Leddene er 
mere eller mindre pladeformigt udvidede og i den indre 
Kant tset burstebesatte. Sidste Led er paa begge Par af 
oval Form og bevsebnet med talrige cilierede Torner, hvoraf 
den fra Spidsen udgaaende, der forestiller Endekloen, er 
noget kraftigere udviklet end de ovrige og ganske glat. 
Epignathcn paa lste Par (ikke fremstillet paa Figuren) er 
lancetdannet og lsengere end Basaldelen. 
Fpddeme (PI. XX, Fig. 19) er i Modssetning til hvad 
Tilfaeldet er bos Slsegten Mysideis temmelig svagt byggede 
og alle omtrent af ens Lsengde. 4de Led er noget lsengere 
end 3die og langs den indre Kant besat med talrige Burster, 
hvoraf de yderste er sserdeles lange og lige fortilrettede. 
Det ydre Afsnit af Foden er omtrent af foregaaende Leds 
Lsengde og sammensat af ikke mindre end 8 — 9 korte, med 
tsette Borsteknipper besatte Led. Det lste af disse er 
sturst, medens det sidste, der egentlig forestiller Basalaf- 
snittet af den ufuldkomment udviklede Endeklo, er meget 
lidet og af konisk Form, cndende med 3 tvnde Burster. 
Svummegrenen er overordentlig stserkt forlsenget og smsekker, 
selv betydelig lsengere end selve Fodens Stamme, Dens 
furnished with a perfect set of marginal bristles. It is, 
as will appear from the last-mentioned Agure, greatly pro- 
duced, about twice as long as the peduncle of the 1st pair 
of antennse, lanceolate, and everywhere beset round the 
margins with long, plumose bristles. The point is obtusely 
rounded, and exhibits a distinct transverse suture, marking 
off a short terminal segment. 
The oral appendages agree on the whole rather closely 
with those in the genus Mysideis. 
The armature of the mandibles exhibits however a 
somewhat different appearance (see PI. Y, Ag. 14). On 
the left mandible occur anteriorly 2 well-deAned dentate 
plates, between which and the molar protuberance are 
attached 4 thick, curved, and ciliated bristles, whereas on 
the right mandible is seen anteriorly but a single, indistinctly 
dentate plate, between which and the molar protuberance 
not a trace of bristles can be detected — merely a simple, 
rounded prominence. The palp (Ag. 15) is of considerable 
size, and densely beset with bristles; its 2nd joint is very 
large, and lamelliform, while the last joint is comparatively 
short, and oval. 
The 1st pair of maxillae (Ag. 16) have both branches 
very considerably incurved, for the rest exhibiting the usual 
structure. 
The 2nd pair of maxillae (Ag. 17) are comparatively 
small, with the basal portion exceedingly short, and, as in 
the genus Mysideis, furnished with but 2 distinct masticatory 
lobules. The exognath is slender-triangular in form, and 
armed along its outer margin with a series of strong, plumose 
bristles. The mesognath is powerfully developed, with the 
last joint very large and broad, of an irregular-rhomboidal 
form, and furnished along the outer margin with a row of 
8 — 10 ciliated bristles. 
The two pairs of maxillipeds (Ags. 18, 19) are both 
powerfully developed, and much the same in structure, 
though the 2nd pair (Ag. 19) occur somewhat larger than 
the 1st. The joints are all more or less lamelliform, and 
densely beset with bristles along the inner margin. In both 
pairs, the last joint is oval in form, and armed with nume- 
rous ciliated spines, that proceeding from the point, winch 
represents the terminal claw, being a triAe more powerfully 
developed than the others, and quite smooth. The epignath 
(not represented in the Agure), occurring on the 1st pair, 
is lanceolate, and longer than the basal portion. 
The legs (PI. XX, Ag. 19), contrary to what is the 
case in the genus Mysideis, are comparatively feeble in 
structure, and all of well-nigh equal length. The 4th joint 
is somewiiat longer than the 3rd, and beset along the inner 
margin with numerous bristles, of which the outermost are 
exceedingly long, and directed straight forward. The outer 
section of the leg has about the same length as the pre- 
ceding joint, and is composed of not less than 8 or 9 
short articulations, beset with dense fascicles of bristles. 
The 1st of these is the largest, while the last, which, strictly, 
represents the basal section of the imperfectly developed 
terminal claw, is very small, and of a conical form, ending 
in 3 slender bristles. The natatory branch is remarkably 
