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synes at dannes af concentriske Ringe, som omgive en aflang
Fordybning, der har en smuk vinrød Farve, og hvori tildels
findes flere smaa, lysbrydende Korn, Fig. 9. De have en
Længde af 0.013""". Disse elliptiske Legemer findes meget
udbredte i Vævene, hvor der forøvrigt ingen Kalk findes,
saaledes i Mundskivens og RygpapUlernes Bindevæv, i
Peritoneum etc.
Imedens Kroppens Hud er temmelig fattig paa Kalk,
er det modsatte Tilfældet med Fødder og Tentakler.
Fødderne, der langs Siderne sidde ligeoverfor hverandre, Fig.
1, 2, danne stive cylindriske Rør, i hvis Bindevæv findes
en stor Mængde Kalkspikler, som ligge tæt paa hverandre
og kredsformig omgive Foden, lig en Filegrans .Kalkkapsel.
Indenfor Bindevævslaget er en Muskelhud, som bestaar af
Ring- og Længdefibre, og til denne er ved et fint Bindevæv
fæstet den Sidegren af Vandkarsystemets Længdekar, som
gaar ind i Foden.
De Kalkspikler. som findes i Fødderne, ere noget
forskjellige fra Hudens. De ere meget større, have en
Længde af 0.614""" og en Bredde af 0.041""", ere mere
eller mindre krumbøiede. stundom dog ganske lige. og ere
besate med en stor Mængde Takker, der ofte, især i begge
Ender, staa saa tætte, at Spiklerne faa Udseende af at
være saugtakkede. Fig. 10. Paa enkelte Spikler udgik fra
Midten en stærk Arm, der endte ganske spids, og selv
denne Arm var temmelig takket. Paa Enden af Foden,
der er konisk, men som kan afplaneres, er ingen Kalkskive;
men her findes flere mindre Kalkspikler, som hjælpe til at
danne Hvælvet af den hule Kegle, Fig. 12. Forøvrigt
findes i det indre Lag af Bindevævet ogsaa de tidligere
omtalte elliptiske Kalkskiver. Fødderne kunne ikke
indtrækkes i Legemet, heller ikke synderlig forkortes, derimod
kunne de bevæges i forskjellige Retninger, og dette sker
da ved deres Grunddel, hvor Kalkspiklerne ere i ringere
Mængde tilstede.
Tentaklerne ere omkring 3""" lange, hvoraf Skaftet
udgjør omtr. 2m" og Bladet 1""". Skaftet er cylindrisk,
lidt fladtrykt mod den adorale Side, Fig. 13, a, og dannes,
foruden af sin Cuticula og Epithelet, af et temmelig fast,
tykt Bindevævslag, hvori enkelte smaa Kalkspikler og de
elliptiske Kalklegemer ere leirede; indenfor Bjndevævslaget
er en Muskelhud, som bestaar af Ring- og Længdemuskler,
og til denne Muskelhud er Tentakelkarret bundet ved et
tyndt Bindevævslag. Den bredere eller haandformige Del
af Tentakelen bestaar af 5 Forlængelser, Fig. 13, b, der
hver har i Regelen 3 Indskjæringer, Fig. 13, c, hvorved
enhver Forlængelse bliver tredelt (trelappet), saaledes
nemlig, at den midterste Lap er den største, Fig. 13, d. Hele
denne haandformige Del med samtlige Forlængelser og
Lapper ere overordentlig rige paa Kalkspikler. De danne
her ved deres Sammenfletninger smukke Kalkpantsere og
central, composed apparently of concentric rings,
circumscribing an oblong excavation, of a fine vinous colour, in
which occur here and there several minute refractive
granules. fig. 9. They have a length of 0.013"". These
elliptic corpuscles are particularly numerous in the tissues,
where there is no calcareous deposit, — for instance in the
connective tissue of the oral disk and of the dorsal p&pillæ,
in the peritoneum, &c.
The skin of the body appears on the whole rather
sparingly furnished with calcareous deposit, whereas the
reverse is the case with the suckers and tentacula.
The lateral suckers, arranged in opposite rows, figs. 1, 2,
constitute stiff cylindric tubes, exhibiting in their connective
tissue a large number of calcareous spiculæ, crowded
together, and encircling the sucker as with a calcareous
filigrane capsule. Underneath the layer of connective
tissue extends a muscular tunic, composed of annular and
longitudinal fibres, a thin connective membrane webbing to
this integument the lateral branch of the longitudinal vessel
of the aquiferous system, which is prolonged into the sucker.
The calcareous spiculæ in the suckers differ slightly
from those in the integument of the body. They are much
larger, measuring 0.614"" in length and 0.041 ■" in breadth,
more or less arcuate, — here and there however quite
rectilinear, — and furnished with a large number of dentelli,
which in places, more particularly at both extremities, are
so densely disposed as to give the spiculæ a serrated
appearance. fig. 10. From the middle of some of the spiculæ
proceeds a strong prolation. terminating in a sharp point,
and this even was to a considerable extent indented. At
the extremity of the sucker, which is conical in form, but
the apex of which -can be depressed, leaving a plane surface,
there is no calcareous plate; but here occur divers smaller
spiculæ, which help to build up the vaulted summit of the
hollow cone, fig. 12. For the rest, the elliptic calcareous
plates also occur in the inner layer of connective tissue.
The suckers cannot be retracted into the body, nor are they
to any considerable extent contractile; they admit however
of being freely moved about in different directions, the
motory power proceeding from the basal extremity, where
the calcareous spiculæ are less numerous.
The tentacles are about 3"" in length, the shaft
measuring 2"" and the pinna 1"". The shaft is cylindric
in shape, slightly depressed on the adoral side, fig. 13, a,
and composed, exclusive of the cuticle and the epithelium,
of a layer of connective tissue, comparatively thick and
firm in texture, through which are dispersed a few
minute calcareous spiculæ and the elliptic calcareous
corpuscles. Beneath the layer of connective tissue extends a
muscular integument, consisting of annular and longitudinal
muscles; and to this muscular integument the tentacular
vessel is webbed by a thin layer of connective tissue. The
broader or palmate portion of the tentacles consists of
5 pinnae, fig. 13, b, each of which, having as a rule 3
incisions, fig. 13, c, is accordingly trifid (three - lobed), the
middle lobe being the longest, fig. 13, d. The whole
of this palmate portion, including the pinnæ and their
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