“Mab. LV &V, Fig. 1. 
or 
a 
Pa ie 
_. trukne Skede; & Aabningen paa Pig- 
gens, Spids; c Fordybning 1 Huden 
omkring Piggens Grund. eat 
Hamingia arctica i naturlig Størrelse. 
a*Mundaabning: § Den halvmaanefor- 
mige Hudfold (Antydning til en Snabel) 
«omkring Munden; c Cylindriske, krum- 
'bøiede Papiller (egentlig Udførselsgange 
for Uteri); d Kloakaabning.: 
Kroppens: forreste Ende, seet forfra, 
' forstørret. a Mundaabning; 0, b De 
to Hudfolder; ¢ Foreningen imellem 
den forreste og bagerste Hudfold; d 
Furen imellem Mundlæberne og den 
forreste Hudfold; e Den brede Fordyb- 
ning imellem den forreste og, bagerste’ 
Hudfold; f De to krumbøiede Papiller. 
. Kroppens bagerste Ende med «Kloak- 
aabningen i Centrum, forstørret. 
Tversnit af Huden, forstørret. a Ou- 
ticula; b, b Det hyaline Bindeværvslag. 
hvori Cellegrupper ere leirede;. ¢ To: 
-sammenhzngende Celler; d Ringmusk- 
ler: e Længdemuskler ; f Skraamuskler ; . 
g Centralnerven. 
Huden ‘seet ovenfra, forstørret. a 
Cellegrupper. 
Hamingia arctica, aabnet fra Ryggen, 
naturlig Størrelse. a Mundhulheden; 
b Spiserøret; c Ringformige Fordyb- 
ninger. dannede af det fibrillære Binde- 
vey; d—t, Begge inklusive Tarmrøret 
med dets mange Boininger; w Rectum; 
v Tendinose Fibre, der binde Kloaken 
til Kropsvæggen:.x Rygkarret. 
Tyersnit af Spiserøret, forstørret. . a 
Epithellaget; bd Indsynkningerne i det 
kjernerige, fibrillære Bindevæv; c fibril- 
lært Bindevæv; d Længdemuskler; e 
- Ringmuskler. 
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 ; )-Hoved- 
stammen for: disse; ¢ Fndetarmen; d 
de tendinøse Fibre; @ Kloak. , 
å En rørformig Gren fra det buskfor- 
mige Organs Hovedstamme; 0); b Slange- 
formige Ror; c Tragtformig Aabning 
for et af disse Rør, forstørret. 
Den øverste. Ende af et slangeformigt 
Ror med sin: tragtformigt udvidede 
"Aabning, forsynet med. Cilier, samt 
dens Vægge tapetserede med Celler, : 
forstørret. 
Su 
«1 
slightly . contracted; b the opening at 
the point of the spike; c depression in 
the skin round the base of the spike. 
Hamingia arctica, natural size: a buceal 
aperture; b lunate fold of the skin 
‘(rudimentary proboscis) round the mouth; 
.¢ cylindric, arcuate papille (strictly, 
eferent ducts for the uteri); d cloacal 
opening. ae 
Anterior extremity of body (front aspect), 
magnified: å buccal aperture; b, J the 
two folds of the skin; ¢ junction of the 
anterior with the posterior fold; d fur- 
row between the buccal labia and the 
anterior fold; ¢ broad depression. between 
the anterior and the posterior fold: / 
the two arcuate papille.’ 
Posterior extremity .of body, with the 
cloacal opening in the centre: magnified. 
Transverse section of skin. magnified: 
a euticle; b, b hyaline layer of connec- 
tive tissue, in which are dispersed groups 
of cells; ¢ two connate cells; d annular 
muscles; é longitudinal muscles; f oblique: 
muscles; g the central nerve. 
The skin, viewed from above, magnified: 
a groups of. cells. re 
Hammgia arctica, opened dorsally, nat- 
ural size: a. cavity of the mouth; b 
æsophagus; ¢ annular dépressions in 
fibrillous connective tissue; d—t (inelu- 
sive) the intestinal canal. with its numer- 
‘ous convolutions: w rectum; 2 tendinous 
fibres. webbing the cloacum to the wall 
of the body; x dorsal vessel. 
Transverse section. of the æsophagus, 
‘magnified: a epithelial layer; ) impres- 
sions in the nucleal. fibrillous connec- 
tive tissue; ¢ fibrillous connective tissue 
d longitudinal muscles; e€ annular mus- 
cles. ne 
- Posterior portion of the body, opened, 
‘and with part of the. tendinous fibres 
cut through and reflected.’ to Show the 
two intestinal appendices, slightly mag- 
nified: a, .@ the bushy ‘glandular appa- 
-ratus; } their principal stem; c rectum; 
d tendinous fibres; e the. cloacum. 
å. a tubular branch protending from the 
principal stem of the bushy organ; b, 0 
sinuous tubes; ¢ funnel-shaped opening 
for one of the tubes. magnified. 
Superior extremity of one of the sinu- 
ous tubes, with its funnel-shaped, ex- 
panded opening, furnished with cilia, 
and having its. walls lined with cells, 
magnified. 
