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91
Tab. VIII. Fig. 25. En Kalkplade, der viser Armenes
Deling. u en Arm: b Armens Deling,
forstørret*
—. 35. (.’eller og Krystaller i Vandkarfluidet,
forstørrede, a. a Celler, hvori
indesluttet Kalkkrystaller: b frie vinrøde
Krystaller.
— 36. Forgrenet Bindevævslegeme, forstørret.
— 37. Klare kornholdige Celler (Sempers Slim-
celler). forstørrede.
Tab. IX, Fig. 38. De brune kolbeformige Legemer i
Tarm-appendices, forstøn-ede.
— 39. Hannens Kjønsorgan.
— 40. Hunnens do.
— 41. Æg i forskjellige Udviklingsstadier.
— 1. Trochostoma ardicum, naturlig Størrelse.
a Mundskivens glatte, hvælvede Del.
— 2. Mundskiven med de i de aflange For-
dybninger indtrukne Tentakler, samt de
rørformige Forlængelser, forstørrede, a
Mundskiven: b de rørformige
Forlængelser; c de aflange Gruber, hvori sees
Tentaklerne.
— 3. En Tentakel, forstørret, a Midtfligen.
— 4. Trochostoma ardicum i naturlig Stør-
relse. aabnet efter Bugen. a
Tvermuskler ; b Længdemuskler: c Kalkring;
d Vandkarring; e Poli s Blære; f
Genera tion sorganer; g Spiserør og Mave; h
lste nedstigende Tarmdel med Bugkarret
og dets Anastomoser; i den fortil
gaaende Tarmdel med Bugkarret og
Mesenteriet: k den af Ler stærkt
udvidede Rectum; 1 Kloaken med de
derfra udgaaende Tarmappendices.
—. 5. Hud. hvori gjeunemborede Kalkplader
med Krone, forstørret.
Tab. X, Fig. 6. Tversnit af Huden hos Trochostoma
arc-tiaim, forstørret, a Cuticula: b
Epi-thel: c flbrillært Bindevæv med
Biude-vævslegemer; d Kalkplade med Krone;
e Radialnerven; / Radialkar med
Sidegrene.
— 7. Tversnit af Huden af Trochostonm
boreale, forstørret, a elliptiske, vinrøde
Kalklegemer; b Kalkplader med delte
Krouer. som ere forsynede med Takker
paa den fri Ende: c Epithellaget: d
tibrilla’rt Bindevæv; e X er v en; /
Radialkar.
— 8. Kalkplader med Udløbere og Kroner
fra Dyrets Ender, forstørrede.
— 9. Forskjelligformede gjenneinbrudte Kalk-
Pl. VIII, fig. 25. A calcareous plate showing the division
of the arms: a an arm; b division of
arm; magnified.
— 35. Cells and crystals in the aquiferous fluid.
magnified: a, a cells containing
calcareous crystals; b free crystals of a vinous
red.
— 36. Rainous corpuscles of connective tissue.
magnified.
— 37. Pellucid cells with granulary contents
.(Semper’s mucous cells), magnified.
Pl. IX, fig. 38. The brown clavate corpuscles in the
intestinal appendices, magnified.
— 39. Generative organ in male.
— 40. Generative organ in female.
— 41. Ova in various stages ol’ development.
— 1. Trochostoma ardicum, natural size: a
smooth, arcuate portion of oral disk.
— 2. Oral disk with tentacles retracted into
the oblong cavities, and the tubular
pro-la tions; magnified: a oral disk; b
tubular prolations; c oblong cavities, in
which are seen the retracted tentacles.
— 3. A tentacle, magnified: a medial lobe.
— 4. Trochostoma ardictm, natural size, op-
ened ventrally: a transverse muscles;
b longitudinal muscles : c calcareous ring;
d water-vascular ring; e vesicle of Poli:
/ genei-ative organs; g oesophagus and
stomach; h 1st descending portion of
intestine with ventral vessel and its.
anastomosing branches; i anteriorly
protending portion of intestine with ventral
vessel and mesentery ; k rectum much
distended with clay ; 1 cloacum with
intestinal appendices issuing from it.
— 5. Strip of skin in which are seen perfo-
rate calcareous plates with corollæ.
magnified.
Pl. X, fig. 6. Transverse section of skin in
Trocho-stoma ardicum, magnified: a cuticle: b
epithelium; c fibrillous connective tissue
with corpuscles of do.; d calcareous plate
with corolla: e radial nerve; / radial
vessel with lateral branches.
— 7. Transverse section of skin in Trocho-
stoma boreale, magnified: a elliptic
calcareous corpuscles of a vinous red: b
calcareous plates with cleft corollæ,
dentate at the free extremity; c epithelial
layer; d fibrillous connective tissue; e
the nerve; / radial vessel.
— 8. Calcareous plates with oft’shoots and
cor-’ • ollæ springing from the extremities of
the body.
— 9. Perforate calcareous plates, of different
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