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55
trukne Skede; b Aabningen paa
Piggens Spids; c Fordybning i Huden
omkring Piggens Grund.
Tab. IV &V. Fig. 1. Hamingia arctica i naturlig Størrelse.
a Mundaabning; b Den
halvmaanefor-mige Hudfold (Antydning til en Snabel)
omkring Munden; c Cylindriske,
kruin-bøiede Papiller (egentlig Udførselsgange’
for Uteri); d Kloakaabnjng.
— 2. Kroppens forreste Ende. seet forfra.
forstørret, a Mundaabning; b, b De
to Hudfolder; c Foreningen imellem
den forreste og bagerste Hudfold; d
Furen imellem Mundlæberne og den
forreste Hudfold; e Den brede
Fordybning imellem den forreste og bagerste
Hudfold; / De to krumbøiede Papiller.
— 3. Kroppens bagerste Ende med Kloak-
aabningen i. Centrum, forstørret.
– 4. Tversnit af Huden, forstørret, a
Cutieula; b, b Det hyaline Bindevævslag.
hvori Cellegrupper ere leirede: c To
sammenhængende Celler; d
Ringmuskler ; e Længdemuskler; / Skraamuskler;
g Centralnerven.
— 5. Huden seet ovenfra, forstørret, a
Cellegrupper.
— 6. Hamingia arctica, aabnet fra Ryggen.
naturlig Størrelse, a Mundhulheden;
b Spiserøret; c Ringformige
Fordybninger. dannede af det fibrillære
Bindevæv; d—t, Begge inklusive Tarinrøret
med dets mange Bøininger; n Rectum;
v Tendinøse Fibre, der binde Kloaken
til Kropsvæggen; x Rygkarret.
— 7. Tversnit af Spiserøret, forstørret, a
Epithellaget; b Indsynkningerne i det
kjernerige. fibrillære Bindevæv: c
fibril-lært Bindeva’v; d Længdemuskler; e
Ringmuskler.
— 8. Den bagerste Kropsdel, aabnet, og
endel af de tendinøse Fibre overskaarne
og slaaede tilside for at vise de to
Tarm-appendices, lidt forstørret, a, a De
buskformige Kjertelapparater; b
Hovedstammen for disse; c Endetarmen; d
de tendinøse Fibre; e Kloak.
— 9. a En rørformig Gren fra det buskfor-
mige Organs Hovedstamme; b, b
Slange-formige Rør; c Tragtformig Aabning
for et af disse Rør. forstørret.
— 10. Den øverste Ende af et slangeformigt
Rør med sin tragtformigt udvidede
Aabning. forsynet med Cilier. samt
dens Vægge tapetserede med Celler,
forstørret.
slightly contracted; b the opening at
the point of the spike; c depression in
the skin round the base of the spike.
Pis. IV &V. fig. 1. Hamingia arctica, natural size: a buccal
aperture: b lunate fold of the skin
(rudimentary proboscis) round the mouth;
c cylindric, arcuate papillæ (strictly,
eferent ducts for the uteri); d cloacal
opening.
— 2. Anterior extremity of body (front aspect),
magnified: a buccal aperture; b, b the
two folds of the skin; c junction of the
anterior with the posterior fold; d
furrow between the buccal labia and the
anterior fold; c broad depression between
the anterior and the posterior fold; /
the two arcuate papillæ.
— 3. Posterior extremity of body, with the
cloacal opening in the centre, magnified.
— 4. Transverse section of skin, magnified:
a cuticle; b, b hyaline layer of
connective tissue, in which are dispersed groups
of cells; c two connate cells; d annular
muscles; e longitudinal muscles; /oblique
muscles; g the central nerve.
— 5. The skin, viewed from above, magnified:
a groups of cells.
— 6. Hamingia arctica, opened dorsally. nat-
ural size: a cavity of the mouth; b
æsophagus; c annular depressions in
fibrillous connective tissue; d—t
(inclusive) the intestinal canal, with its
numerous convolutions: w rectum: r tendinous
fibres, webbing the cloacum to the wall
of the body; x dorsal vessel.
— 7. Transverse section of the æsophagus,
magnified: a epithelial layer; b
impressions in the nucleal. fibrillous
connective tissue; c fibrillous connective tissue;
d longitudinal muscles; e annular
muscles.
— 8. Posterior portion of the body, opened,
and with part of the tendinous fibres
cut through and reflected, to show the
two intestinal appendices, slightly
magnified: a. a the bushy glandular
apparatus ; b their principal stem; c rectum;
d tendinous fibres; e the cloacum.
— 9. a, a tubular branch protending from the
principal stem of the bushy organ: b, b
sinuous tubes; c funnel-shaped opening
for one of the tubes, magnified.
— 10. Superior extremity of one of the sinu-
ous tubes, with its funnel-shaped,
expanded opening, furnished with cilia,
and having its walls lined with cells,
magnified.
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