. 24 
Resultater, hvortil jeg er kommet, stemmer idethele 
temmelig vel overens med hvad Claus her har med- 
delt. Paa Tab. V fremstiller Fig. 1 en Hun seet 
fra Siden og sterkt forstorret, med de forskjellige 
Organer indtegnede i samme og anlagte med for- 
skjellige Farver. Fig. 2 fremstiller et Tveersnit af 
Legemet omtrent over Midten af Truncus; de indre 
Organer er anlagte med samme Farve som paa 
Hovedfiguren. 
Tarmtractus. 
Spiseroret er meget kort og stiger fra Mund- 
aabningen lodret i Veiret, forbindende sig under en 
nesten ret Vinkel med den forreste, i Hovedet lig- 
gende Del af Tarmen. Dette forreste Afsnit af 
Tarmtractus er forsynet med et temmelig compli- 
ceret Chitinskelet (Tab. V, Fig. 3, 4) og danner saa- 
ledes et Slags Tyggemave, noget lignende den hos 
Amphipoderne forekommende. Paa Chitinskelettet 
kan adskilles 3 Hoveddele, en forreste, en midterste 
og en bagerste Del. Den forreste Del er noget 
‘affladet og indeholder 2 fortil divergerende Lister, 
besatte med en dobbelt Rad af fine, tet sammen- 
treengte Chitinpigge. Lige ved Indgangen til Spise- 
roret findes desuden ventralt 2 parvise Forhoininger, 
besatte med indadrettede Borster. Den midterste 
Del er temmelig steerkt opsvulmet og bagtil skraat 
afskaaret, dannende her en nesten klokkeformig 
Udvidning, hvorfra rager frem et Par tet haarede 
Flige. Det er her at de tilTarmen horende Lever- 
sekke forener sig for at udmunde i Tyggemavens 
Lumen. Den bagerste Del, endelig, danner en lang 
skedeformig, og i de frie Kanter med fine Borster 
besat tynd Flig, der kun indtager Dorsalsiden af 
Tarmen og med sin i en fin Spids udtrukne Ende 
rekker langt ind i selve Truncus. Tarmen danner 
forevrigt et simpelt cylindriskt, med steerke Rimg- 
muskler forsynet Ror, der strekker sig igjennem 
hele Midtkroppen. Bagkroppen og Mesteparten af 
Halen. Ved Enden af nestsidste Halesegment for- 
binder den sig med en kort, sterkt muskulos Ende- 
tarm, der aabner sig nedenunder Basis af Halegre- 
nene. Af Leversekke findes ikke mindre end 4 Par, 
alle seerdeles tynde og saa fast forbundne med Tar- 
men med fedtholdigt Bindevev, at de yderst vanske- 
ligt lader sig isolere fra samme. Det forreste af 
disse Par er meget korte og rettede fortil over 
Tyggemaven, medens de 3 ovrige Par folger Tarmen 
bagud og ender omtrent ved Begyndelsen af Halen. - 
Paa Tveersnit (Fig. 2) viser disse sidste (ed, ev) sig 
grupperede nesten i Form af en Rosette omkring 
og tet ind mod Tarmen, med et noget sterre Mel- 
lemrum mellem det dorsale Par. 
nified figures of male and female, presented as 
transparent objects. The results at which I have 
arrived agree, upon the whole, pretty well with 
what Claus has here stated. Plate V, fig. 1 repre- 
sents a female viewed laterally and greatly magni- 
fied, with the various organs drawn in the repre- 
sentation and coloured with different colours. Fig. 2 
represents a transversal section of ‘the body across 
nearly the middle of the truncus; the internal organs 
are coloured with the same colours as in the chief 
figure. 
The intestinal tract. 
The oesophagus is very short and rises per- 
pendicularly from the oral aperture, connecting 
itself at almost a right angle with the foremost 
part of the intestine situated in the head. That 
foremost section of the intestinal tract is fur- 
nished with a pretty complicated chitinous skeleton 
(Pl. 4, fig. 3, 4) and forms thus a kind of mastica- 
tory stomach, somewhat like what is present in the 
Amphipods. Three chief parts may be distinguished 
in the chitinous skeleton, a front one, a medial one, 
and a back one. The front portion is somewhat 
flattened and contains 2 fillets which diverge to 
the front and are beset with a double series of fine, 
closely crowded chitinous spikes. Exactly at the 
mouth of the oesophagus there are further found, 
ventrally, 2 prominences in pairs, beset with bristles 
directed inwards. The medial part is pretty greatly 
swollen out and obliquely truncated behind, forming 
here a nearly bell-shaped dilation, from which a 
pair of densely hirsute flaps project. It is here 
that the liver-sacs pertaining to the intestine 
unite, in order to debouch into the cavity of the 
masticatory stomach. The posterior part finally 
forms a long sheath-like thin flap which is, on its 
free edges, beset with fine bristles, and only occupies 
the dorsal side of the intestine; and which, with its 
extremity drawn out to a fine point, extends far 
into the truncus itself. The intestine forms, other- 
wise, a plain cylindrical tube furnished with strong 
ring-muscles, which extends itself through the entire 
mesosome, the metasome, and the greater part 
of the urosome. At the extremity of the pen-. 
ultimate caudal segment, it connects itself to a short, 
strongly muscular rectum which opens below the 
base of the caudal rami. Of liver-sacs there are 
no less than 4 pairs found, all of them particularly 
slender, and so firmly connected to the intestine by 
fatty connective-tissue ‘that it is extremely difficult 
to isolate them from it. The foremost pair of these 
sacs is very short and directed forwards above — 
the masticatory stomach, while the 3 other pairs 
follow the intestine backwards and terminate at 
about the beginning of the urosome. In trans- 
versal sections (fig. 2) these last show themselves 
