De er paa Midten stamkt, nsesten boileformigt krummede, 
med den iudad mod Munden fremspringende Arm. der synes 
at svare til Tyggefortsatsen bos de egentlige Carider, meget 
smal, cylindrisk, dog noget udvidet i Enden. Denne er 
paa begge Ivindbakker kloftet til 4 spidse, parvis stillede 
T fender, livoraf do to mere eller mindre daekker de to 
ovrige (se Eig. 10). Kindbakkeme er helt igjennem chiti- 
niserede, og navnlig den omtalte mod Munden rettede Arm 
(pars incisiva) af temmelig fast Consistens og intensiv gul- 
brun Farve. 
Iste Par Kjtever (Fig. 11) bestaaraf 3 Ira entykkere 
Hoddel udgaaende Gxener eller Lapper. Den indre af disse 
or smalt tnngeformig og vcd den ai’rundede Elide forsynet 
med line Burster. Den midterste Gren er betydelig kraf- 
tigere udviklet og synes at danne den umiddelbare Fortsfet- 
telse af Roddelen. Den er stairkt indadkrummet og paa den 
tviert afskaarne Ende bevsebnet med 4 stierke Torner ioruden 
eu hel Del tine Burster. Begge disse Grener er rettede 
iudad mod Mundaabningen og forestiller den egentlige Kjie re- 
did (Endognath). Den ydre Gren, der er faestet til Yder- 
sideu af den midterste og noget hoiere oppe end den inderste 
er uligt de 2 ovrige rettet udad. Den er af en lignende 
smal tungedannet Form som den indre, men at mere mem- 
branes Beskaifenked og langs den ydre Kant besat med 
omtrent 14 korte Fjasrborster og i Spidsen med en enkelt 
simpel Borste. Ialinindeligbed bar man beteguet denne 
Gren som Exognathen; men den svarer aabenbart ikke til 
livad man benaevner saa paa de ovrige Munddele, men 
snarere til den saakaldte Mesognatb. Den egentbge Exo- 
gnath mangier her eller er ganske rudimentier. 
2det Par Kjaever (Fig. 12) er fuldstsendig pladefor- 
mige og af membranos Beskaffenhed. Den egentlige Kjseve- 
del (Endognatb), der bos andre Macrurer ssedvanlig bestaar 
af 4 indadrettede Tyggelapper, er her ganske rudimentser, 
kun dannende en lidet freintrsedende, med nogle taa simple 
Borster besat Knude. Umiddelbart foran denne Knude ud- 
gaar eu smal, i Enden borstebesat Fortsats, som forestiller 
den saakaldte Mesognatb. Storsteparten af disse Kjaever 
indtages af eu meget stor, fra den ydre Side at Koddelen 
udgaaende membranos Plade, der maa betragtes som homolog 
med den saakaldte Exognath paa Kjfevefodderne. Paa denne 
Plade kan adskilles en fortilrettot, i Enden bredt afrundet 
og langs Kanterne med en regelmaessig Bad af Fjierborster 
besat Del, samt en lige bagudrettet, smalt tungeformig Flig, 
der er af betydelig Lamgde, og ved Spidsen forsynet med 
Here overordentlig lange og tynde, bagud og indad krum- 
mede Burster. Hele denne Plade benaevnes saulvaulig Yiften 
(flabellum ), et Navu, der godt passer til dens Function; men 
det er at bemserke, at den morphologiskt ikke svarer til 
hvad man kalder saa paa de fulgende Munddele. 
Iste Par Kjfevefodder (Fig. 13) er ligeledes hoved- 
sageligt af membranos Beskaffenhed og bestaar af 3 for- 
skjelligt forniede Hoveddele eller Grene. Den indre Gren, || 
feeble. In the middle they are exceedingly curved, in the 
shape almost of a, bow, with the terminal portion projecting 
inward towards the mouth and apparently corresponding 
to the molar , projection in the true Caridce, exceedingly 
narrow, cylindric, but somewhat dilated at the extremity. 
On both mandibles, this extremity is cleft into 4 acutely 
pointed teeth, arranged in pairs, two of the teeth to a 
greater or less extent covering the others (see fig. 10). 
The mandibles are chitinous throughout, the terminal portion 
(pars incisiva) in particular being of a firm consistence 
and of a deep yellowish-brown colour. 
The 1st pair of maxilla! (fig. 11) consist each of 3 
branches or lobes, proceeding from a thickish basal part. The 
innermost of these is slender linguiform, and, at the rounded 
extremity, furnished with delicate bristles. The middle 
branch is much more powerfully developed, and would 
appear to constitute the immediate continuation of the 
basal part. It is bent very considerably inwards and, at 
the truncate extremity, provided with 4 powerful spines, 
exclusive of numerous delicate bristles. The outer branch, 
attached to the exterior margin of the median, and a trifle 
higher up than the innermost, is, contrary to what is the case 
with the 2 others, directed outwards. Like the. inner branch, 
it is slender linguiform, but more membranaceous in char- 
acter, and beset along the outer margin with about 14 short 
plumose bristles, a simple bristle projecting from the point. 
Generally, this branch has been termed the exognath; but 
it certainly does not correspond to what is thus designated 
on the other buccal parts — rather, one would opine, to 
the so-called mesognatb. The true exognath is wanting 
here, or must at least be quite rudimentary. 
The 2nd pair of maxilke (fig. 12) are quite lamellar 
in form and of membranous structure. The true maxillary 
portion (endognath), which, in other Maerura, generally 
consists of 4 inwardly directed masticatory lobes, is in 
tins animal quite rudimentary, constituting merely a small 
protuberant knob, beset with a few simple bristles. Imme- 
diately in front of this prominence, extends a slender prola- 
tion furnished at the extremity with bristles, constituting 
the so-called mesognatb. The greater part of these maxillae 
occupy an extremely largo membranous plate, proceeding 
from the outer margin of the basal part, and which must 
be regarded as homologous with the so-called exognath on 
the maxillipeds. On this plate can be distinguished a divi- 
sion, anteriorly directed, broadly rounded at the extremity, 
and furnished along the edges with a regular row of plumose 
bristles, as also a slender, linguiform lappet, directed straight 
backwards, of very considerable length, and at the point 
having several exceedingly long and delicate, posteriorly and 
inwardly curving bristles. The whole of this plate is gen- 
erally termed the fan (flabellum), a name well befitting its 
function: we must, however, bear in mind that, morpholog- 
ically, it does not correspond to Avhat is thus designated on 
the following buccal parts. 
The 1st pair of maxillipeds (fig. 13) are likewise 
chiefly membranaceous in substance, and consist of 3 diff- 
erently formed principal parts or branches. The innermost 
