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Fåm. Epitlietosiomatidse, Dan. & Kor.
Legemet forsynet med et cylindrisk, hult, med
Krops-hulheden korresponderende Rør. Bagenfor dette, paa hver
Side af Kroppens Forende, en Spalte, i Bunden forsynet
med Aabninger. Ingen Børster.
Slægtskarakter.
Legemet cylindrisk, paa dets forreste Ende forsynet
med et langt, ikke retractilt, rørformigt Tilhæng (Snabel).
Bagenfor dette, paa Bugsiden, den runde Mundaabning.
Paa hver Side af den forreste Kropsende en Spalte, der i
Bunden er forsynet med flere Aabninger. Ingen
Anal-appendices. Anus i Kroppens bagerste Ende.
Artskarakter.
Kroppen cylindrisk, 12mm lang, 2mm bred. Det
rør-formige Tilhæng 2x/2 Gang saa langt som Kroppen.
Tarmen lige, stærkt foldet. Farven paa Kroppen olivengrøn,
paa Snabelen bleg grønlig.
Den Beskrivelse vi her have leveret er jo i mange
Punkter yderst ufuldkommen; thi det Materiale, der har
staaet til vor Disposition, har baade været ringe — kun
to Exemplarer — og slet konserveret. Ved et Uheld vare
de blevne opbevarede paa et saa lidet Glas, at
Spiritusindholdet ikke var tilstrækkelig til en god Konservation.
Det var især de indre Organer, der havde lidt, og
det i den Grad, at Vævene for en stor Del vare ramollerede.
Men da det her omhandlede Dyr efter vor Formening i
flere Henseender har stor Interesse for Videnskaben, fandt
vi det rigtigt at offentliggjøre vore Undersøgelser, saa
ufuldstændige, de end ere, i Haab om, at naar Opmærksomheden
engang var vakt, vilde det senere lykkes Forskere at
erholde et bedre og rigere Materiale, hvorved Iagttagelserne
ikke alene kunde optages paany, men at ogsaa derved de i
vor Beskrivelse muligens indløbne Feil kunne berigtiges og
Manglerne udfyldes.
Det vil være indlysende af vor Beskrivelse, at vort
nye Dyr ikke kan henføres til nogen af de af Gephyreerne
hidtil bekjendte Familier eller Slægter. Det afviger paa
saa mange Maader fra disse, og ikke mindst derved, at det
har Spalter, der aabne Forbindelsen mellem Søvandet og
Kropsvædsken, at vi et Øieblik var’ i Tvivl om, hvorvidt
vi havde med en Gephyre at gjøre, — en Tvivl, der dog
snart hævedes ved den Kundskab, vi erholdt om Dyrets
Organisation. Denne tilhører overveiende Gephyreernes.
De nævnte Aandespalter ? ere jo ganske eiendommelige og
fremmede for denne Klasse af Dyr, og har neppe noget Analogon.
Vi have saaledes ikke alene opstillet en ny Slægt
foldet; men vi have endog fundet det nødvendigt at grunde
en ny Familie, hvortil Slægten kan henføres.
Fam. Epith.etosomatid.0e5 Dan- & Kor.
Body furnished with a cylindrical, hollow tube,
communicating with the perivisceral cavity. Posterior to this
tube, on either side of the anterior extremity of the trunk,
a cleft, or fissure, the bottom pierced with apertures. No
bristles.
Generic Character.
Body cylindric, furnished at the anterior extremity
with a long, non-retractile, tubiform appendix (proboscis).
Posterior to the appendix, on the ventral surface, the round
buccal opening. On either side of the anterior extremity of
the trunk, a cleft, or fissure, the bottom pierced with several
apertures. No anal appendices. The anus on the posterior
extremity of the trunk.
Specific Character.
Trunk cylindric, 12ram long, 2mm in diameter. The
tubiform appendix 2x/2 times the length of the trunk. The
intestine straight, with prominent folds. Colour of trunk
olive-green; of proboscis pale-green.
The description we have here ventured to give is in
many respects very incomplete, the materials from which
it has been furnished having been not only scanty, but —
a far greater drawback — also defective: two examples in
a bad state of preservation. Unfortunately, the glass jar
in which the specimens had to be brought home, was so
small, that the quantity of spirits was insufficient for
perfect preservation.
The internal organs had suffered most, to that extent
indeed, that the greater part of the delicate tissue was
found to have become more or less disintegrated. But, as
this rare animal will, we opine, prove of great scientific
interest, we feel no hesitation in publishing the results of
our investigation, however meagre and incomplete, hoping
that, when attention shall have been once aroused,
zoologists may at some future period succeed in obtaining more
extensive and better materials, wherewith could be resumed
the observations prematurely arrested, and any errors
rectified that may be found to detract from the value of our
description.
It will be obvious from the criteria recorded, that
Epithetosoma cannot be referred to any known genus or
family of Oephyrea. It differs indeed from them all in so
many respects, and not least by reason of the fissured
opening through which the sea-water gains access to the
perivisceral cavity, that we were a moment in doubt as to
whether the animal before us could be a Gephyrean, —
a doubt, however, speedily set at rest on our proceeding
to investigate its organisation. The aforesaid respiratory
fissure is, however, something eminently peculiar, and alien
to this class of animals; its analogue probably does not exist.
Hence we have not only had to institute a new genus
but have found it necessary to establish a new family for
the reception of Epithetosoma.
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