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Centralnervestrængen bestaar af en tyk muskuløs Skede,
Fig. 14, i, indenfor hvilken den egentlige Nervemasse er,
som dannes af et ydre celluløst Lag, Fig. 14, k, som er
det bredeste, og et indre fibrillært, Fig. 14, l, der ligesom
omgiver Centralkarret. Imellem. Cellerne og Fibrillerne er
et fint Bindevæv, der kitter Elementerne sammen og som
udgaar fra Skedens indre Flade. Paa den forreste Del af
Spiserøret tabte Nervestrængen sig i ramolieret Væv, saa
vi ikke kunne afgjøre, hvorvidt den danner nogen
Svælgring, hvilket dog er det sandsynligste; thi i Snabelen
forlænger den sig ikke, — det have vi overbevist os om baade
ved Tver- og Fladesnit.
Hvad Blodkarsystemet angaar, saa kunne vi Intet
derom meddele, da vi ikke have fundet Spor dertil paa
Grund af den slette Konservation.
Langs den forreste Halvdel af Tarmens Bugflade og
bundet til Mesenteriet saaes et baandforniigt, langstrakt
Organ, der syntes at være dannet af sækformige
Udbugt-ninger, og hvori kunde iagttages Cellegrupper, der tydede
hen paa en begyndende Ægdannelse. Yi antage dette
Organ for en Æggestok.
Paa høire Side af Tarmen i Kropshulhedens forreste
Del fandtes et langt, næsten cylindrisk Organ, hvis forreste
noget smalere Del var fæstet til Bugen; og
Tilheftnings-stedet svarede til det Sted, hvor der udvendig paa Kroppen
saaes den førbeskrevne Aabning.
Lige ved Tilheftningsstedet paa Organets undre Flade
saaes en Forlængelse, der sandsynligvis var den tragtformige
Aabning for Æggebeholderen, som vi antage dette Organ
for at være; men da vi nærmere vilde undersøge denne
Forlængelse, viste det sig at Vævet var saa ramolieret, at
vi ikke vove med Sikkerhed at antage den for Tragten.
Det langstrakte Organ, Fig. 11, /, havde en afrundet
fri Ende; men var forresten bundet til Kropsvæggen ved
flere fine Bindevævstraade. Yi fandt intet Indhold i dette
Organ. Væggene vare muskuløse, men sammenfaldne, og
gik let i Stykker ved Berørelse.
Kropsvædsken var kun at iagttage i Snabelen, og den
indeholdt en Mængde næsten skiveformige Celler, der havde
en svag brungul Farve.
Farven.
Legemet er olivengrønt. Snabelen bleg grønlig,
næsten klar.
Findested Station 190; kun to Exemplarer.
The central nervous chord consists of a thick
muscular sheath, fig. 14, i, underneath which lies the true
nervous substance, consisting of an outer cellular layer, fig.
14, k, comparatively broad, and of an inner fibrillous layer,
fig. 14. I, surrounding, as it were, the central vessel.
Between the cells and the fibrils extends a layer of delicate
connective tissue, uniting the several elements, and which
issues from the inner surface of the sheath. On the
anterior portion of the oesophagus the nervous chord was lost
in a layer of disintegrated tissue, and we could not therefore
determine whether it forms an pharyngeal ring, ^vhich,
however, it most probably does; for it is not produced into
the proboscis; of this we are assured from a careful
examination both of transverse and longitudinal sections.
As regards the circulatory system (blood vessels) we
have, nothing whatever to communicate, not having found so
much as a trace thereof in the badly preserved specimens.
Along the anterior half of the ventral surface of the
intestine, and webbed to the mesentery, was seen a
riband-shaped, elongate organ, consisting apparently of a series of
sac-like dilatations,’ and in which groups of cells could be
distinguished having the appearance of developping ova.
We regard this organ as an ovary.
On the right side of the intestine in the anterior
portion of the perivisceral cavity, protended a long, almost
cylindrical organ, with its anterior, somewhat slenderer, part
webbed to the belly, the line of attachment corresponding
to the place on the outer surface, of the body in which was
seen the fore-described opening.
Close to the line of attachment on the inner surface
of the organ, was an elongated prolation, most probably the
funnel-shaped opening to the uterine pouch, which we take
the said organ to be; but on proceeding to a closer
examination, the tissue proved so completely disintegrated
that we dare not regard it as the funnel.
The elongate organ, fig. 11, f, had a rounded free
extremity, but was webbed to the wall of the body by
numerous delicate filaments of connective tissue. This
organ we found to be void of contents. The walls were
muscular, but had fallen in, and crumbled to the touch.
The perivisceral fluid was observed in the proboscis
only, and it contained numbers of almost discoid cells,
pale brownish-yellow in colour.
Colour.
The body olive-green. The proboscis pale-green, and
almost hyaline.
Taken at Station 190: two specimens.
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