Segmentalorganerne ere to, temmelig lange, der fæste 
sig som almindeligt lidt bagenfor Anslagbningen paa hver 
Side af Retractoren, Fig. 2, c. 
Spiserøret er meget tyndt og langt, og ligger ligesom i 
en Fure paa Retractoren lige bag til det Sted, hvor dennes 
Rødder forene sig, Fig. 2, d; her gaar. det over i Tarmen, der 
gjør et Par løse Bøininger, Fig. 2, e, for derefter spiral- 
formig: at lobe .bagtil, næsten imod Kropshulhedens Ende, 
Fig. 2, f, hvor uden at være befæstet til 
denne, og slynger sig saa atter spiralformig fortil mod 
den bøier om, 
Kroppens Midte, Fig. 2, g, bvor den gaar over i en lang, 
nesten ligelobende Rectum, Fig. 2, h, der munder ud paa 
Ryggen. 
Tarmspiralen er ved enkelte tendinøse Traade bun- 
den til Kropsvæggen; 
findes ikke. 
Paa Spiserøret iagttages et langt slangeformigt, re- 
tractilt Kar, der bagtil imod Retractorens tvende Rødder 
ender blindt; men fortil omgiver Svælget og danner Vand- 
karringen, hvorfra Tentakelkarrene udgaa. 
Nervestrængen løber langs Midten af Bugfladen, Fig. 
2, 7, afgiver en Mengde Sidegrene i sit Lob og danner 
fortil omkring Spisergret, 
som sædvanligt, en Svalgring 
hvorfra sendes Grene til Svælg og Tentakler. 
Aiggestokken er fæstet til den bagerste Trediedel at 
Spiserøret, er i Begyndelsen baandformig, men bliver snart 
cylindrisk og danner ligesom et Rør, der slynger sig *flere 
Gange om Tarmen. Den indeholdt Æg i forskjellige Ud- 
viklingsstadier, ligesom fuldmodne Æg enkeltvis svømmede 
frit om i Kropsvædsken. De Exemplarer, vi undersøgte, 
vare Hunner. 
Undertiden bebor den 
lever den uden noget saadant. 
Amneliderør, men sædvanligt 
Findested. 
Station: 34, 40, 51, 87, 176, 200, 295. Nogle faa 
Exemplarer paa hver Station. . 
Artskarakter. 
Legemet cylindrisk, glasklart Kroppen forsynet med 
spredte, fine Papiller; dens Bredde i Forhold til Læng- 
den som 1—20.  Smabelen lige lang som Kroppen, besat 
, med yderst smaa spidse Papiller. Tentaklerne 8—10. En 
Retractor. 
Aspidosiphon armatum, n. sp. 
Tab. I, Fig! 5, 6; Tab. IT, Fig. 714. 
Kroppen cylindrisk, 8”” lang; den bagerste Ende er 
tvært afskaaren og forsynet med et rundt Chitinskjold, Fig. 
5, der er sammensat at Plader, 
men nogen særskilt Spindelmuskel 
af hvilke de, som danne 
The segmental organs — 2 in number — are com- 
paratively long, and, as in other species, attached to the 
body a little posterior to the anal opening, on luer side 
of the retractor, fig. 2, ce. . 
The cesophagus is exceedingly thin and long, and 
extends, as it were, down a furrow in the retractor, back 
to the point at which the roots of the latter unite, fig 2, d, 
where it passes on into the {ntestine, which, after one or, 
two lax convolutions, twists spirally back almost to the end 
of the perivisceral cavity, fig. 2, f; here it bends over, but 
without being attached to the latter, winding spirally on 
towards the middle of the body, fig. 2, y, where it enters 
a long and almost straight rectum, fig. 2, h, which 
disembogues on the back. 
Å few tendinous filaments web the pel ot the intestine 
to the walls of the body; but there is no separate fusiform 
muscle. | 
On the æsophagus is seen a long, sinuous, retractile 
vessel, with a cæcal termination in close proximity to the 
roots of the retractor, 
as the vascular 
but anteriorly encircling the gullet 
ring, from which issue the tentacular 
vessels. y 
The nervous chord extends along the nfildlle of the 
ventral surface, with numerous subsidiary branches, forming, 
as usual, round the cesophagus anteriorly "a pharyngeal 
ring, from which branches proceed to the gullet and the 
tentacles. 
Anteriorly, the ovary is w eheed to the posterior third of 
* the esophagus; at first riband-shaped; it soon becomes ey- 
lindric, constituting, as it were, a tube, that winds repeatedly 
_ round the intestine. It contained ova in various stages of 
development; also mature ova, floating here and there in 
‘the perivisceral fluid. The specimens we examined were all 
of them females. kli 
This animal sometimes takes up ‘its abode in the house 
of an Annelid, but is generally found to dispense with 
such an habitation. 
Locality. 
At Stations 34, 40, 51, 87, 176, 260, 295: ; a few 
“specimens at each station. 
Specific Character. 
Body cylindrical, hyaline. Trunk furnished + with mi- 
nute, distant papillæ; its breadth compared to its length as 
1 to 20. Proboscis, equal in length to trunk,, studded with 
exceedingly minute pointed papillae. From 8 to 10 tentacles. 
One retractor. 
Aspidosiphon, armatum, n. Sp. 
PIT, figs! 5, 65 BITT hess 7— 142 
Body cylindrical, 8”” long; 
and furnished with a round chitinous shield, fig 5, composed 
ot plates, those forming the rim oval (petaloid), with the 
posterior extremity truncate, 
