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116
at en Paxille i den indre Række; t,
Naalene paa samme Paxille.
Tab. Xin, Fig. 10. En Ambulacralplade, forstørret. a,
Midtpartiet; b, den øverste, articulerende
Flade; c, den transversale Proces.
— 11. To Ambulacralplader, der med deres
transversale Processer forene sig med
Adambulacralpladerne, forstørret, a, b,
c, som paa Fig. 10; d,
Adambulacral-plade; e, Artikulationsfladen paa den
øverste Ende; /, den nederste Ende, der
udvider sig kugleformigt til Siderne;
g, Artikulationen for den lange
Kalk-naal; h, Piggen imellem de lange
Kalk-naale.
— 12. Tre Ambulacralplader forenet, for-
størret. a, Midtpartiet; b, den øverste,
artikulerende Flade; c, transversale
Processer med deres halvrunde Indsnit.
Imellem disse Processer sees
Aabninger for Fødderne.
— 13. To Adambulacralplader, seet fra Siden,
forstørret. a, Artikulationsfladen paa
den øverste Ende; b,
Artikulationsfladen paa den underste Ende; c,
Artikulationsfladen for den lange Kalknaal;
d, de to Ambulacralpigge.
— 14. Et Stykke af den ydre Ryghud, for-
størret. a, Aabning; b,
Muskelbundter; c, Epithelialfortykkelse i
Aabnin-gens Rand.
— 15. Det øverste Stykke af en Paxille med
3 Naale tillige med en Del af den ydre
Ryghud, forstørret, a. Aabninger; b,
Bindevævshud med Muskelfibre; c,
Muskelfibre; d, Aabning halv tildækket.
— 16. Et Stykke af den ydre Ryghud, seet
fra den indre Flade, forstørret, a,
Aabning ; b, Muskelbundter; c,
Muskulhu-den, der paa den indvendige Flade
strækker sig udover endel af
Aabninger
— 17. Den lange Kalknaal, der udspænder
Bughuden, forstørret, a, Basaldelen;
/’, Ledfladen; c, de fine Kalkstave, der
danner Naalen.
— 18. Nogle Finner af Pferaster militaris, for-
størret. a, Spalte imellem Finnerne;
b, Klappen, der lukker den; c, en
af-slaaet Finne.
— 19. Kalkpiggen, som indesluttes i den
nævnte Klappe hos Pteraster militaris.
a, Ledflade.
Tab. XIV, Fig. 1. Bathybiaster paüidu* i naturlig Størrelse.
s, Basal part of a paxilla of the inner
series. †, Needles of the same paxilla.
Pl.Xm, fig. 10. An ambulacral plate; magnified, a, The
mesial part, b, The superior articulating
surface, c, Transverse process.
— 11. Two ambulacral plates, united by trans-
verse processes to the • adambulacral plates;
magnified, a, b, c, The same as in fig. 10.
d, Adambulacral plate. e, Articulatory
surface on the superior extremity. /,
The lower extremity, which expands
laterally, in spherical form, g, The
articulatory surface for the long calcareous
needle, h, Spine between the long
calcareous needles.
— 12. Three ambulacral plates united; magnified.
a, Mesial part, b, The superior
articulatory surface, c, Transverse processes with’
their semi-circular cavities. Between the
processes small openings for the suckers
are seen.
— 13. Two adambulacral plates, lateral aspect;
magnified, a, Articulatory surface on the
superior extremity. b, The articulatory
surface on the inferior extremity, c The,
articulatory surface for the long calcareous
needle, d, The 2 ambulacral spines.
— 14. A portion of the exterior dorsal integu-
ment; magnified, a, Aperture, b,
Muscular bundles. c, Tumified marginal
epithelium of the aperture.
— 15. The superior part of a paxilla, with 3
needles, and a portion of exterior dorsal
integument; magnified, a, Apertures, b,
Connective-tissue membrane with muscular
fibres, c, Muscular fibres, d, Aperture,
half covered.
— 16. A portion of the outer dorsal integument,
interior aspect; magnified, a, Aperture. •
b, Muscular bundles, c, Muscular
integument, which on the interior surface,
extends over a portion of the aperture.
— 17. The long calcareous needle which ex-
pands the ventral integument; magnified.
a, The basal part, b, The ai’tidilatory
surface. c, The slender calcareous rods
forming the needle.
— 18. Some fins of Pteraster militaris; magni-
fied. a, Fissure between the fins, b, The
flap which covers it. c, An extended fin.
— 19. The calcareous spine which is encased in
the flap, in Pteraster militaris. a,
Articulatory surface.
Pl. XXV, fig. 1. Bathybiaster pallidiis; natural size.
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