Ventralkanalen, kun dækket af det yderst tynde Coenen- 
chym, hvilket dog ikke er Tilfældet. "Naar den nærmer 
sig Rachis, gjør den en Boining imod Dorsalfladen for 
strax derefter at vende tilbage til Ventralfladen, hvis Midte 
den følger lige til Endepolypens Grund; her gjør den atter 
en Boining mod Dorsalfladen for derfra at bøie sig S-for- 
migt op imod Ventralfladen, hvor den ender i Ventralka- 
nalen, Fig. 4. Nedentil ender den i en lille Hage. Axen 
er tykkest i den øverste Del af det bulbøse Parti; den er 
firkantet med afrundede Kanter og 4 dybe Furer, hvoraf 
Ventral- og Dorsalfuren er dybest og dreiet efter Læng- 
den, saa at Furerne ikke danne rette Linier. Denne Drei- 
ning tiltager betydeligt op imod og i selve Rachis. Axen 
er omgiven af en tyk, membranøs Skede, hvorpaa de 4 
Septa fæste sig. 
No. 2. 
Mal» We he Bs 6, 7 
Stilken er temmelig opretstaaende, dens hele Længde 
fra den nederste Ende til Rachis er 150”” lang; den 
lidt vreden efter Længden, overtrukken med Slim, og dens 
øverste Halvdel er næsten rund, imedens den nederste, 
bulbøse Del, som er 48”” lang, 4—5”” bred, er noget imd- 
kneben paa Midten, lidt fladtrykt paa Ventral- og Dorsal- 
fladen og ender i en ovoidformet Skraaflade, der lober ud 
i en Spids, Fig. 5, a. Stilken aftager i Tykkelse succes- 
sivt op imod den øverste, udvidede Del, hvor den kun er 
1m tyk. Den skedeformige Udvidning er 7”” lang men 
meget smal; kun der, hvor den gaar over i Rachis, indta- 
eer den en Bredde af henved 2””, 
er 
Rachis er noget dreiet til Siden, temmelig opsvulmet, 
10”” lang, paa Midten omtr. 6”” bred og ender lidt af- 
stumpet, Fig. 5. 7; den bærer 7 udviklede Polyper og 1 
embryonal. Ventralfladen er konvex, har en Sidedreining, 
er bred og forstørstedelen besat med Zooider, — kun paa 
dens nederste Halvdel sees en Midtlinie, hvor Axen, der 
er nøgen, skinner gjennem, Fig. 7, a. Dorsalfladen 
smal, lidt konkav, dreiet til Siden og overalt besat med 
Zooider, der over Ventralfladens Sider danner lancetfor- 
mede Felter imellem Polyperne, saa at egentlig hele Rachis 
er tæt besat med Zooider, naar undtages den før omtalte 
nøgne Stribe paa Ventralfladen, Fig. 6, a. Sidefladerne, 
eller maaske rettere Siderandene, ere yderst smale og danne 
Grændsen imellem Dorsal- og Ventralfladen. 
er 
Terminalpolypen sidder lige i Enden af Rachis, og 
ved første Øiekast ser det ud, som om den udsprang fra 
Den norske Nordhavsexpedition. Danielssen og Koren: Pennatulida. 
into the ventral duct itself; covered, only, by the extremely 
thin sarcosoma; this is, however, not the case. Ås it 
approaches the rachis, it curves towards the dorsal surface, 
turning, immediately afterwards, back to the ventral sur- 
face, and following along its mesial line, right to the base 
of the terminal polyp. It, here, forms another curve to- 
wards the dorsal surface, and thence, curves in form of 
an S, up towards the ventral surface; where, it terminates 
in the ventral canal (fig. 4). 
small hook. 
It terminates beneath, in a 
The axis is thickest in the superior part of 
the bulbous portion; it is quadrangular, with rounded ed- 
ges, and has four deep grooves; of which, the ventral and 
dorsal grooves are the deepest, and are longitudinally twisted ; 
so that the furrows do not form straight lines. This twist- 
ing increases, considerably, up towards, and also, in the 
rachis itself, The axis is surrounded by a thick membran- 
ous sheath, upon which, the four septa are secured. 
No. 2 specimen. 
Pl. V, figs. 5. 6, 7. 
The stem is tolerably vertical, and its whole length, 
from the inferior extremity to the rachis, is 150””. It is 
slightly twisted longitudinally, and is enveloped by mucous; 
the superior half portion is almost round; whilst the 
inferior bulbous portion; which is 48”” long, and 4—5”” 
broad; is somewhat constricted at the middle, slightly flat- 
tened, on the ventral and dorsal surfaces; and terminates 
in an ovate, sloping surface, which projects in a point (fig. 
5, a). The stem diminishes gradually in thickness, up to- 
wards the superior dilated part; at which point, it is 
only 1” thick. The sheath-formed dilation is 7”” long, 
but very narrow; only attainmg a breadth of about 2””, 
at the point where it passes over into the rachis. 
The rachis is somewhat laterally twisted, and is con- 
siderably swollen. It is 10”” long, and about 6”” broad 
at the middle; and its termination is somewhat trun- 
cated (figs. 5. 7). It carries seven fully developed polyps, 
and one embryonal polyp. The ventral surface is convex, 
and has a lateral twist; it is broad, and for the greater 
part, is beset with zooids. Only on the inferior half 
portion, is a mesial line observed; where the axis; which 
is bare; becomes visible, (fig. 7, a). The dorsal surface is 
narrow, and somewhat concave, it is twisted laterally, and 
is everywhere beset with zooids; which, on the margins 
of the ventral surface, form lancet-formed areas between 
the polyps; so that, im reality, the entire rachis is closely 
beset with zooids; with exception, of the bare stripe on 
the ventral surface previously spoken of (fig. 6, a). The 
lateral ‘surfaces, perhaps more correctly, the lateral 
margins, are extremely narrow, and form the border be- 
tween the dorsal and ventral surfaces. 
The terminal polyp is situated exactly at the extrem- 
ity of the rachis; and at first sight, appears, as if it pro- 
3 
or 
