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Ende. Den bagerste Del, optagende hele Tarmkanalen,
næsten kuglerund, glasklar, endende i en opak Conus, paa
hvis Spids Anus. Æggestokken i den forreste Del af
Kropshulheden. Ingen Børster.
extremity. The posterior portion, containing the whole of
the intestinal canal, almost globular, hyaline, terminating
in an opaque conus, at the apex of which is the anal
aperture. The ovary in the anterior portion of the
perivisceral cavity. No bristles.
Artskarakter.
Kroppens forreste, cylindriske, opake Del 12mm lang;
den bagerste glasklare, kugleformige Del 18""" lang, 12 til
14mm bred. Farven er hvid paa. den forreste Kropsdel,
spillende lidt i det Blegrøde, og paa den koniske Ende,
imedens den kuglerunde, glasklare Del er farvefri.
Ogsaa her ere vi i det beklagelige Tilfælde at maatte
gjøre Undskyldning for den mindre fuldstændige Beskrivelse,
vi have leveret; thi kun et enkelt Exemplar stod til vor
Tjeneste, og da Dyret baade er lidet og paa Grund af
dets Zarthed yderst vanskeligt at behandle, have de
anato-misk-histologiske Undersøgelser været meget møisommelige,
saa ufuldkomne de end ere blevne. Men Saccosoma vitreum
er jo i sin Form en saa mærkelig Gephyre, at vi ikke
kunne undlade at beskrive den; og det eneste Exemplar er
derfor saagodtsom ganske ofret paa Videnskabens Alter.
Vi have henført dette høist mærkelige Dyr til
Familien Bonellidæ, ihvorvel det i flere Henseender afvige
derfra; men naar vi ikke vilde danne en ny Familie for det,
hvortil vi for Tiden ingen tilstrækkelig Grund finder,
maatte vi blive staaende ved den nævnte Familie, hvortil
det mest nærmer sig.
Specific Character.
The anterior cylindric opaque portion of the body
12mm long; the posterior, hyaline, globular portion 18mm
long, 12—14""" broad. Colour white, shot with pale red,
on the anterior portion of the body and on the conical
apex; the globular, hyaline portion colourless.
Of this genus, too, our description is in some respects
we regret to say, confessedly incomplete, referring as it
does to a single specimen, the only one yet obtained.
Besides, the small size and delicate organisation of the animal
necessitating the greatest care in handling, its
anatomical-histological investigation, however incomplete, has proved a
toilsome and perplexing task. But Saccosoma vitreum is
in form and structure a Gephyrean so truly remarkable,
that we could not resist the call to describe it; and a
unique specimen of a new genus has, we may say, been
sacrificed to the paramount claims of Science.
We have referred this very curious animal to the
family Bonellidæ, — with which, though differing from it
in many important points, Saccosoma has most in common
— since we are not at present prepared with conclusive
reasons warranting the establishment of a new family for
its reception.
Epithetosoma1 norvegicum, n. g. & sp.
Tab. VI, Fig. 9—15.
Kroppen er cylindrisk, 12mm lang, 2mm bred med en
lidt tykkere afrundet Forende, Fig. 9, a, hvorfra udgaar
et Appendix (Snabel), der danner et hult
halvgjennemsig-tigt Rør, Fig. 9, b, som er 30mn langt, omtrent lmm tykt
ved Grunden og 0.8""" i den øvrige Længde, indtil den
yderste Spids, • der er lidt tyndere, og hvori Røret ender
blindt.
Kroppen smalner successivt af mod den bagerste Ende,
der er konisk afrundet, og paa hvis Spids findes den runde
Analaabning.
Strax bagenfor Snabelens Grunddel findes paa hver
Side af Kroppen en Spalte, Fig. 13, a, der er omtrent
2.5mm lang, har en lidt krum Retning, saa at den forreste
Ende, der er den smaleste, bøier noget af mod Rygsiden;
1 cutestov = Tilhæng; oujxa = Legeme.
Epithetosoma1 norvegicum, n. g. & sp.
Pl. VI, figs. 9—15.
Trunk cylindrical, 12mm long, 2mm broad, with a
somewhat thicker rounded anterior extremity, fig. 9, a, from
which protends an appendix (the proboscis), constituting a
hollow, semi-translucent tube, fig. 9, b, 30mm long and about
1mm thick at the base; elsewhere 0.8mm throughout its
length to the extreme point, which is a trifle slenderer,
and in which the tube terminates cæcally.
The trunk gradually narrows towards its posterior
extremity, which is conically rounded, and pierced at the
point with the round anal opening.
Immediately posterior to the basal portion of the
proboscis, on either side- of the trunk, is seen a cleft or
fissure, fig. 13, a, about 2.5mm in length, and somewhat
arcuate, the anterior extremity, which is narrower than the
1 Eitfoeto-*: appendage; aw(j.a: body.
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