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Svælget, Fig. 6, x, i Dybden og løber bagtil over venstre
Æggebeholder, hvor det tiltager temmelig betydeligt i
Tykkelse, Fig. 14, b, c. Herfra løber det hen til den venstre
horizontale Tarmslynge, Fig. 14, d, paa dennes Rygflade,
hvortil det er bundet ved Bindevævstraade ved Siden af
Rygmesenteriet; naar det ei’ kommet et Stykke bag paa
Tarmslyngen, deler det sig i 2 Hovedstammer, Fig. 14, e,
hvoraf den ene nu følger Tarmrørets Rygflade langt bagtil,
hvor det synes at ophøre, efterat have forladt den 5te
Tver-slynge. Karret er overalt tæt bundet til Tarmen, og
al-giver hist og her enkelte Grene til denne; hvorvidt disse
igjen fordele sig og danne Anastomoser, kunne vi ikke
afgjøre, da vi ikke have fundet noget saadant.
Den anden Hovedstamme deler sig derimod i mange
Grene, som igjen forgrene sig og danne ligesom et bredt
Belte, der dækker næsten hele Tarmens Rygflade, idet" disse
mangfoldige Smaagrene, som ere bundne sammen ved et
tyndt Bindevæv, gaar over mod Bugfladen, Fig. 14, g, og
træffe her paa lignende Smaagrene fra Bugkarret, hvormed
de synes at forene sig. Disse Karbundter ere fæstede til
Tarmen, have en skidden gulhvid Farve, ere samlede et
Par Millim. brede og 4—5mm lange.
Bugkarret er tykkere end Rygkarret, løber paa den
horizontale Tarmslynges Bugside, Fig. 14, li, hvor det
ogsaa deler sig i to Hovedstammer, hvoraf den ene. ligesom
ved Rygkarret løber langs Tarmens Bugflade bagtil, hvor
den ender omtrent paa samme Sted, som Rygkarret — kun
paa Tarmens Bugside, Fig. 14, i. Den anden Hovedstamme,
Fig. 14, k, forgrener sig paa samme Vis som Rygkarret,
og hjælper til at danne den føromtalte Karudbredning.
Fortil løber Bugkarret lidt tilhøire, Fig. 14, l, 15, b,
efterat have afgivet en stærk Gren til det forreste Parti af
Tarmrøret og Svælget, Fig. 15, c, en Gren, der gaar
bagtil langs Nerven, Fig. 15, d, og endelig en Gren, der gaar
over paa en anden Tarmslynge, Fig. 15, e. Naar det har
afgivet disse Grene, løber det lidt i Dybden, krydser sig
med Rygkarret, gaar nu langs Nerven, imellem begge
Ægge-beholderne, Fig. 14, m, og fortsætter sit Løb paa
Mundhulhedens ydre Bugflade indtil dennes forreste Ende, strax
bagenfor Mundaabningen, hvor det deler sig i to Grene,
Fig. 15, g, der omgive Spiserøret, for, efter alt hvad vi
kunde se, at forene sig med Rygkarrets tvende Grene,
hvorved en Ringkanal fremkommer.
Den venstre Gren er temmelig tynd; men den høire
udvider sig strax, Fig. 15, h, og fra denne Udvidning gaar
et tykt Kar lidt bagover, bliver et kort Stykke smalere,
Fig. 15, i, og taber sig i et stærkt muskuløst, aflangt,
æg-formigt, hult Legeme (Hjerte?), der var opfyldt med Blod
og flotterede frit i Kropshulheden, Fig. 15, k. Fra
Ringkanalen gik flere korte Grene ind imellem Hudens Muskellag.
becomes almost straight, passes under the gullet, at some
depth beneath it, fig. 6, x, and then protends backward
across the left uterus, where it increases considerably in
thickness, fig. 14, b, c. Here it makes for the left horizontal
circumvolution of the intestine, fig. 14, d, to the dorsal
surface of which it is webbed by membranous filaments of
connective tissue, alongside of the dorsal mesentery; it now passes
some distance back on the said circumvolution, and then
divides into 2 trunk-like stems, fig. 14, e, one of which
protends far back along the dorsal surface of the intestinal
canal, whei’e, after quitting the 5th transverse
circumvolution, it apparently terminates. The vessel is closely webbed
to the intestine, to which it sends off every here and there
a few branches; but whether these branches also ramify,
forming anastomoses, we are unable to state.
The other trunk-like stem divides into a number of
branches, which ramify in turn, and form, as it were, a
broad cincture, covering almost the whole dorsal surface of
the intestine; for these numerous branchlets, which are
webbed together by a thin connective membrane, stretch
across to the ventral surface, fig. 14, g, meeting there similar
branchlets from the ventral vessel, with which they
apparently unite. These vascular fascicles, dirty yellowish-white
in colour, are attached to the intestine, and measure
collectively about 2mm in breadth and 4—5mm in length.
The ventral vessel, which is thicker than the dorsal,
protends along the ventral surface of the horizontal
circumvolution of the intestine, fig. 14. h, where it likewise di-,
vides into 2 trunk-like stems, one of which passes backward,
as does that of the dorsal vessel, along the ventral surface
of the intestine, where it terminates in the same place
about as the dorsal vessel, — but on the ventral surface of
the intestine, fig. 14, i. The other trunk-like stem, fig. 14,
k, divides in the same manner as the corresponding stem
of the dorsal vessel, and helps to form the aforesaid
vascular expansion.
Anteriorly, the ventral vessel swerves a little to the
right, fig. 14, I; 15, b, after sending off a thick branch to
the anterior portion of the intestinal canal and the
gullet, fig. 15, c; a branch protending backwards along the
nerve; and a branch passing over to the 2nd
circumvolution of the intestine, fig. 15, e. It now runs on at
some depth, intersecting the dorsal vessel, then strikes off
along the nerve, between the two uteri, fig. 14, m, and,
continuing its course along the outer ventral surface
of the buccal cavity to the anterior termination of the
latter, divides into two branches, fig. 15, g, which
encompass the oesophagus, and unite, so far as we could
distinguish, with the two branches from the dorsal vessel,
forming an annular canal.
The left branch is comparatively thin, but the right
one immediately expands, fig. 15, h, and from this
expansion issues a thick vessel, which, after passing backwards
a little, becomes for a short space somewhat narrower, fig.
15, i, and then coalesces with an exceedingly muscular,
oblongo-ovate, hollow body (heart?), filled with blood, and
floating freely in the perivisceral cavity, fig. 15, k.
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