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22
og omtrent af samme Bredde som Dorsalfladen, Fig. 20", a.
Lader man denne gaa i et med Sidefladerne, saa faar man
et trekantet Spatium (tresidigt Prisma), hvorfra de 13
udviklede Polyper tage deres Udspring, Fig. 1(5. ,
Terininalpolypen udgaar fra Enden af Rachis, dog
nærmere Dorsalfladen. Dens Ivrop er 12""" lang, 4""" bred;
Tentaklerne 25""" lange, Fig. 15, d. Fig. 16, 1* 21, a.
Omtrent 3""" fra Endepolypen, men midt paa Dorsalfladen,
staar en Polyp, hvis Krop er 15""" lang, 3""" bred,
Tentaklerne 20""" lange, Fig. 21, b; i en lignende Afstand fra
denne udspringer ligeledes midt paa Rygfladen en Polyp,
der er 18""" lang, 14""" bred, med 16""" lange Tentakler, Fig.
21, c. Disse 3 Polyper indtage i en lidt paaskraas
opad-gaaende Linie Midtpartiet af Rachis, saaledes at
Endepolypen staar høiest, Fig. 16. i. Imellem Endepolypen og
den midterste .af de 3 nysbeskrevne Polyper, iagttages paa
hver Side 2 Polyper, hvis Krop er 16""" lang, 4""" bred,
med 16—18’""’ lange Tentakler (dorsal-laterale Polyper),
Fig. 16, 2,2. 21, d, d. Udenom disse Polyper, eller
rettere til liver Side men noget nedenfor, udspringe 3
Polyper (laterale Polyper). der ere 30""" lange, 6’""’ brede,
Tentaklerne 45""" lange, Fig. 16, :i, :>, ;’>. 21, e, e, e. Imellem
Endepolypen og en af de mindre Polyper til Höire sees
en konisk Fremstaaenhecl med en liden Aabning paa
Spidsen (en begyndende Polyp). Polyperne indtage her en
temmelig fremtrædende bilateral sy metrisk Stilling paa
Rachis, hvilket alene efter Habitus at domme ikke synes at
være Tilfældet; thi Polypgruppen, der er hængende paa
Stilken, har Udseende af en rund Dusk, Fig. 20. Det er
först, naar Polyperne omhyggelig begges ud fra hverandre,
at Symetrien kommer ret tilsyne. Terminalpolypen med
de to nedenfor denne, men i lige Linie staaende Polyper,
danner Dorsalfladens Centrum; lidt til hver Side af disse,
men endnu paa Dorflaclen, vise sig 2 Polyper, og fra hver
af de laterale Sider udspringe 3 stort* Polyper, der ganske
skjule do 5 indre Polyper fra Siderne, imedens disse mod
Dorsal- og Ventralfladen skjules af Endepolypen og don
diametral modsatte Dorsalpolyp. Her or altsaa, om man
saa vil, en ydre og indre Række Polyper paa liver Side af
do 3 centrale Polyper, Fig. 16.
Polyperne ere cylindriske, næston lige tykke overalt,
— dog ere de ved deres Udspring noget smalere ond
paa Midten, ligesom don øverste Del mod Tentakelrandon
er lidt udvidet. Paa Kroppens ydre Flade sees 8 brungule
Længdelinier, der antyde Insertionerne for do 8 Septa,
Fig. 20". Tentaklerne ere cylindriske, lidt fladtrykte paa
den nederste Halvdel af don adorale Flade, og paa hver
out over the lateral surfaces; these are almost flat, and
have a breadth, about the same as that of the dorsal
surface (Pl. VII, fig. 20", a). If the dorsal surface is
continued into the lateral surfaces, we obtain a triangular
spatium (trilateral prism), in which the 13 developed polyps
have their origin (Pl. VI, fig. 16).
The terminal polyp proceeds from the extremity of
the rachis, but closer to the dorsal surface. The body is
12""" long, and 4""" broad and the tentacles are 25""" long
(Pl. VI. figs. 15, d. 16, 1* Pl. VII. fig. 21, a). About
3""" from the terminal polyp; but in the middle of the
dorsal surface; a polyp is situated, whose body is 15"""
long, and 3""" broad, and the tentacles are 20""" long (PI.
VII. fig. 21, b). At a similar distance from that polyp;
and, also, in the middle of the dorsal surface; another
polyp occurs, which is 18""" long, and 14’""’ broad, and it
has tentacles 16""" long (PI. VTI, fig. 21, c). Those three
polyps, occupy, in a slightly diagonal rising line, the
mesial part of the rachis, in such manner, that the terminal
polyp is situated uppermost (Pl. VI. fig. 16, l). Between
the terminal polyp and the central one of the three polyps
just described, two polyps are observed on each side.
Their body has a length of 16""". and a breadth of 4""".
and the tentacles have a length of 16—18’"’" (dorso-lateral
polyps) (Pl. VI, fig. 16, 2,2. Pl. VII, fig. 21. d.d).
Outside these polyps, or more correctly, upon each side, but
somewhat lower, 3 polyps proceed (lateral polyps). These
are 30’"’" long, and 6""" broad, with tentacles 45""" long
(Pl. VI, figs. 16, :t, .1, 3. Pl. VII, fig. 21, e. e, e).
Between the terminal polyp and one of the smaller polyps
on the right, a small conical protuberance is seen, which
has a small aperture at the point (an embryonal polyp).
The polyps, in this situation, assume a rather marked
bilateral arrangement on the rachis, which, however, would
not appear to be the case, if judged only by the habit;
because, the groups of polyps depending, from the stem
have the appearance of a round tassel (Pl. VII, fig. 20).
It is, only, when the* polyps are carefully separated apart
from each other, that the bilateral symmetry can properly
be observed. The terminal polyp, with the 2 polyps which
stand in a straight line below it, form the centre of the
dorsal surface. A little to each side of these; but still
on the dorsal surface; 2 polyps appear; and from each of
the lateral margins, 3 large polyps proceed, completely
con-coaling the 5 inner polyps from the sides, whilst, those
towards the dorsal and ventral surface, are concealed by
the terminal polyp, and the diametrically opposite dorsal
polyp. There is therefore, here, if we like to call it so,
an outer and an inner series of polyps, on each side of
the 3 central polyps (Pl. VI, fig. 16).
The polyps are cylindric; and are, nearly
everywhere, of the same thickness; but, at their origin, they
are somewhat narrower than in the middle; whilst, also,
the upper part, toward the tentacular margin, is a little
expanded. On the exterior surface of the body, 8
brownish-yellow, longitudinal lines are seen, denoting the insertions
of the 8 septa (Pl. VII. fig. 20"). The tentacles are
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