30 
Sv0ben er (se Fig. 1 og 2) sserdeles lang, selv acl- 
skilligt lsengere end bele Legemet og bestaar af et cylin- 
driskt, 3-leddet Skaft (se fig. 4) og en traadformig, raange- 
leddet Endedel. 
Overlseben (Fig. 5) er hjelmformig og temmelig bred, 
med Sidefloieno noget nddragne og den forreste Del frem- 
springende i Form af en stump Tand. 
TJnderlaeben (Fig. 6) er forboldsvis liden og bestaar 
af to noget divergerende, i Enden skjsevt afskaarne Lapper, 
paa hvilke ingen Ciliering kunde opdages. 
Kindbakkerne (Fig. 7) udmaerker sig i hoi Grad fra 
samme hos SI. Hippolyte og nserstaaende Former derved, 
at de ganske mangier den forreste tandbaerende Gren, livori- 
mod den bagre Gren (Tyggeknuden) er yel udviklet og 
danner Kindbakkens umiddelbare Fortssettelse. Denne Gren, 
der med Kindbakkens Corpus danner en omtrent ret Yinkel. 
er af cylindrisk Form og noget fortykket mod Enden. Den 
nsesten tviert afkuttede Spids riser den ssedvanlige Broheg- 
ning af knudeformige Ophoininger, der udmaerker Tygge- 
knuden hos Hippolyterne, hvortil endnu kommer nogle fan 
spidse Taender, der navnlig paa venstre Kindbakke er tyde- 
ligt udviklede. Fra den indre Side af Corpus udgaar en 
kort. i Enden stumpt tilrundet Fortsats, hvortil de standee 
Botationsmusklers chitinagtige Sene faester sig. Af nogen 
Palpe findes intetsomhelst Spor. 
lste Par Kjcever (Fig. 8) er forboldsvis temmelig store 
og viser 3 vel udviklede Grener eller Lapper, hvoraf den 
midterste er storst, neesten Oxeformigt udvidet og stserkt 
sammentrykt, samt langs sin indre Kant bevmbnet med korte 
tornformige Burster. Den indre Gren er smal, koniskt til- 
spidset og fortilkrummet, med begge Kanter og Spidsen borste- 
besat. Den ydre Gren, der som ssedvanligt er faestet hoiere 
oppe og rettet mere udad, er smalt tungeformig, afstumpet 
i Enden og her besat med nogle fortilkrummede Borster. 
2det Par Kj sever (Fig. 9) bar den saedvanlige plade- 
dannede Form. Det indre Parti oiler den egentlige Kjeeve- 
dei (Endognath) er vel udviklet og dolt i 3 tydeligt b»- 
graendsede, men tset sammentrsengte og i den indre Kant 
rigeligt borstebesatte Tyggelapper, hvoraf den forreste er 
storst. Fra den ydre Side af denne. Del udgaar en smal 
fortilrettet og i Spidsen med lange Borster forsynet Gren 
(Mesognathen), og lsengere udad den pladeformige Exognath. 
der som ssedvanligt viser et fortilrettet, tungeformigt, med 
stserke Fjserborster forsynet Parti og en bagudrettet. noget 
lancetformig Forlsengelse. 
lste Par Kjmrefodder (Fig. 10) er omtrent af samme 
Storrelse som 2det Par Kjscver og som disse hovedsageligt 
af membranes Beskaffenhed. Den egentlige Kjsevedel eller 
Endognath bestaar af 2 tiet sammeutraengte, brede og i den 
indre Kant tab borstebesatte Tyggelapper. Mesognathen 
viser et lignende Udseende som paa 2det Par Kjaever. Exog- 
nathen er i sin basale Pel ganske pladeformig og langs den 
ydre Kant forsynet med standee Fjaerborster, men forltenger 
sig indad i en smalt cylindrisk af 2 utydeligt adskilte Led 
bestaaende Endesmert. Til den ydre Side af den fadles 
The flagellum (see figs. 1. 2) is exceedingly long, a 
good deal longer even than the whole body, and consists of 
a cylindric. three-jointed peduncle (see fig. 4) and a filiform, 
multi-articulate terminal portion. 
The labrum (fig. 5) is galeate in form and rather 
broad, with the lateral wings somewhat produced, and the 
anterior portion projecting as an obtuse tooth. 
The labium (fig. 6) is comparatively small, and consists 
of two. somewhat diverging and at the ends obliquely 
truncated, lobules, on which no trace of ciliation could be 
detected. 
The mandibles (fig. 7) differ essentially from those in 
the genus Hippolyte and other approximating forms, exhib- 
iting as they do no trace of the foremost dentiferous branch, 
whereas the posterior branch (molar protuberance) is well 
developed, and constitutes the immediate continuation of 
the mandibles. This branch, placed about at right angles 
with the corpus of the mandibles, is cylindric in form 
and somewhat inspissated at the extremity. Its well-nigh 
truncate point exhibits the usual, so to speak, paved surface 
of tuberculiform prominences characteristic of the molar 
protuberance in the Hippolytes , as also a few sharp- 
pointed teeth, which, particulary on the left mandible, are 
distinctly developed. From the inner side of the corpus, 
extends a short and, at the extremity, obtusely rounded 
projection, to which are attached the strong chitinous sinew 
of the rotatory muscles. Of a palp no trace can be deteced. 
The 1st pair of maxilla? (fig. 8) are comparatively 
large, with 3 well-developed branches or lobes, of which 
the median is the largest, almost securiform, and greatly 
compressed, as also, along its inner margin, armed with short, 
spiniform bristles. The inner branch is slender, conically 
pointed, and curved anteriorly, with both margins and the point 
beset with bristles. The outer branch, attached as usual higher 
up and more externally directed, is slender linguiform, and obtuse 
at the extremity, where it lias a few anteriorly curving bristles. 
The 2nd pair of maxilla? (fig. 9) exhibit the usual 
lamelliform shape. The inner portion, or maxillary part (endog- 
nath). is Well developed, and divided into 3 distinctly defined, 
but closely arranged, and along the inner margin- densely 
bristle-beset, masticatory lobules, of which the foremost is 
largest in size. From the outer side of this part, issues a 
slender branch (mesognath), anteriorly directed, and furnished 
at the point with long bristles, and farther out the lamelli- 
fprm exognath, which as usual exhibits a linguiform. anteri- 
orly directed part, furnished with strong, plumose bristles, 
and a posteriorly directed, somewhat lanceolate prolongation. 
The 1st pair of maxillipeds (fig. 10) are about of the 
same size as the 2nd pah of maxilla?, and. like the latter, 
membranaceous in substance. The maxillary portion, or 
endognath. consists of 2 broad, closely arranged masticatory 
lobes, beset along the inner side with a dense armature of 
bristles. The mesognath presents a similar appearance to 
that on the 2nd pair of maxilla?. The exognath is quite 
lamelliform throughout its basal portion, and furnished along 
the outer margin with strong, plumose bristles, but extends 
inward as a slender, cylindric terminal lash, composed of 
