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No. 4.
Tab. VI, Fig. 11. 12. 13. 14.
Stilken, der paa den øverste Trediedel danner en
langstrakt Bue, er noget dreiet efter Længdeaxen, 184"""
lang fra Grunden til Hachis. Den nedre, bulbøse Del,
som er 50’"’" lang, paa Midten 2,5""" og paa dens øverste
Parti 5""" bred, samt noget fladtrykt paa Ventral- og
Dorsalfladen, ender i en ægformet, 4""" bred Skraaflade,
der løber ud i en Spids, Fig. 11. Tyndest er Stilken op
imod den øverste, skedeformigt udvidede Del, som er
stærkt bøiet, 12"’"’ lang, 2,5"’"’ bred, hvor den gaar over i
Rachis. Denne er 7""" lang, 5,5""" bred, men smalner
successivt af op imod Enden, Fig. 12.
Ventralfladen er stærkt konvex, noget dreiet til Siden
og har paa Midten en nøgen, glat Længdelinie, hvor Axen
skinner igjennem, men er forresten tæt besat med Zooider,
Fig. 12, a.
Dorsalfladen er lidt konkav, ikke meget bred og tæt
besat med Zooider, der udbrede sig imellem Polyperne, hvor
de danne de tidligere omtalte Zooidefelter, af hvilke eier
ere to paa hver Side, Fig. 13, a.
Sidefladerne ere her mere udviklede end paa de 3
foregaaende Exemplarer og ere ligeledes besatte med
Zooider, saa at Rachis, naar undtages den omtalte Midtlinie
paa Ventralfladen, er ganske indtagen af Zooider. •
Rachis bærer 8 udviklede Polyper og 1 uudviklet.
Terminalpolypen sidder paa Enden af Rachis; den er 7’""’
lang, 3m’" bred; Tentaklerne omtrent 10’""’lange, Fig. 12,b.
13, b. 14, b. Lige under Terminalpolypen sidde ved
Siden af hinanden paa Midten af Dorsalfladen 2 smaa
Polyper, hvis Krop er 4""" lang med lidt kortere Tentakler,
Fig. 13, c. 14, c. Nedenfor disse to smaa Polyper,
ligeledes midt paa Dorsalfladen, staar en Polyp, der er 8"""
lang, 2""" bred, med Tentakler lidt længere end Kroppen,
Fig. 13, d. 14, cl. Paa liver Side af Dorsalpolyperne
udgaa 2 Polyper, hvoraf de 2, der staa nærmest Dorsalsiden,
ere 10’""’ lange, 4""" tykke, med 12""" lange Tentakler, Fig.
14, e, imedens de øvrige 2, der staa lige paa Siden,
nærmere VentralHaden, ere 12""" lange, 4""" brede med 14—16"""
lange Tentakler, Fig. 12, c. 14, /. Under Endepolypen,
men noget til høire Side henimod Ventralfladen, sees en
liden, konisk Forhøining, der er en Polyp i Udvikling.
Rachis er paa dette Exemplar ikke saa stærkt
fordreiet som paa det foregaaende; den bilaterale Symetri er
heller ikke saa vanskelig at finde sig tilrette i, som
Tilfældet var med No. 3.
No. 4 specimen.
Pl. VI, figs. 11. 12. 13. 14.
The stem, on its superior third part, forms an
elongated arc, somewhat twisted longitudinally, and is 184"""
long, from the base to the rachis. The inferior bulbous
portion, is 50""" long, 2.5""" broad at the middle, and 5mm
broad at the superior part, and is somewhat flattened on
the ventral and dorsal surfaces. It terminates in an ovate
sloping surface, having a breadth of 4"""; and projecting
in a point (fig. 11). The stem is thinnest, up towards
the superior, sheath-formed, dilated part; this is sharply
curved, and has a length of 12"™, and a breadth of 2.5""",
at the point where it passes over into the rachis. The
rachis is 7""" long, and 5.5""" broad, but becomes
gradually narrower towards the extremity (fig. 12).
The ventral surface is sharply convex, and is
somewhat twisted laterally; in its middle, there occurs a
smooth longitudinal line, through which the axis becomes
visible; but, otherwise, it is closely beset with zooids
(fig. 12, a).
The dorsal surface is somewhat concave; not very
broad; and is closely beset with zooids, which spread
themselves between the polyps; forming thus, the
previously mentioned zooidal areas, of* which, there are two on
each side (fig. 13, a).
The lateral surfaces in this specimen, are more
developed than in the three previous specimens; and, are also
covered with zooids, so, that the rachis is entirely covered
with zooids, except, the mesial line of the ventral surface
already spoken of.
The rachis carries, 8 fully developed polyps, and 1
undeveloped polyp. The terminal polyp is situated on the
extremity of the rachis, and is 7mm long, and 3""" broad.
The tentacles are about 10""" long (figs. 12, b. 13, b. 14,6).
Just below the terminal polyp, 2 small polyps are situated
alongside each other, in the middle of the dorsal surface.
Their body is 4""" long, and the tentacles are somewhat
shorter (fig. 13, c. 14, c). Beneath these two small
polyps, and, also, in the middle of the dorsal surface, there
stands a polyp, which is 8’"’" long, and 2’""’ broad, with
tentacles somewhat longer than the body (figs. 13, ei. 14, ei).
On each side of the dorsal polyps, two polyps proceed, of
which, the two situated next to the dorsal side, are 10"""
long, and 4""" thick, and have tentacles 12""" long; (fig. 14, t’)
whilst, the other two; which are situated exactly on the
side, nearer to the ventral surface ; are 12""" long, and 4"""
broad, with tentacles 14—16""" long (fig. 12, c. 14, /’).
Below the terminal polyp, but somewhat to the right side,
towards the ventral surface; a small conical protuberance
is seen; this is a polyp in process of development.
In this specimen, the rachis is not so strongly
twisted as in the previous ones. The bilateral
arrangement, is, also, not so difficult to trace out as is the case
in No. 3 specimen.
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