. 
imod den skedeformige Udvidning. Denne er 170”” lang, 
bliver alt bredere og bredere, dreier sig spiralformigt og 
antager en Bredde af 127”. hvor den gaar over i Rachis, 
Fig. 23, a. Saavel Ventral- som Dorsalfladen er tæt besat 
med Zooider, der blive mere spredte, naar de forlade den 
skedeformige Udvidning og ordne sig til en Zooidestribe 
paa hver Side, hvilken strækker sig et langt Stykke ned- 
over Stilken. 
Rachis bærer 31 Polyper, er næsten rund, lidt flad- 
trykt fra Dorsal- mod Ventralfladen, 267” bred, 35”” hoi 
og 80”" i Omkredsen, hvor Polyperne tage deres Udspring, 
Fig. 23, b, og har en afrundet, smal Ende, der er 5”” bred 
med en fri Rand imod Ventralfladen, Fig. 23, c. Denne 
er lidt konvex efter Længden med en svag Fure langs 
Midten, ,meget smal foroven og overalt tæt besat med 
Zooider. 
Dorsalfladen er lidt konkav paa Midten men noget 
hvælvet til Siderne, hvor den gaar over i de lidt paaskraa- 
gaaende, laterale Flader; med disse danner den, om man 
vil, et liggende Prisme. Fra Dorsalfladen og de laterale 
Flader forlænge sig imellem Polyperne 8 lancetformige 
Zooidefelter, Fig. 23, b, d, saa at Rachis kun er fri for 
Zooider paa de Steder, hvor Polyperne udspringe. 
Terminalpolypen staar saagodtsom ganske paa den 
afrundede Ende af Rachis men tydeligt paa dennes Dor- 
salside; den er 15”” lang, 5”” bred og har 922”” lange 
Tentakler, Fig. 23,1. Nedenfor, eller bagenfor den, i om- 
trent 1”” Afstand, sees en liden, smal Polyp, 8”" lang med 
8”” lange Tentakler, og nedenfor denne i samme Linie 
staar en større Polyp, 23”” lang, 5”” bred og med Tentakler 
af samme Længde som Kroppen. Disse 3 udgjøre de 
central-dorsale Polyper. Paa hver Side af de 3 Central- 
polyper er der 14 Polyper stillede i 3 Rækker, den ene 
udenfor den anden. 4 Po- 
lyper, hvoraf de fleste ere 15”” lange med lige lange Ten- 
takler, kun en til Venstre af Endepolypen er blot 5”” lang 
med 4”” lange Tentakler; denne Række kan benævnes 
dorsal-laterale Polyper, Fig. 23, 2, 2. Udenfor 
en næsten halvrund Række paa hver Side, bestaaende af 
5 Polyper af lidt forskjellig Størrelse, fra 15—25"” lange 
med Tentakler af samme Længde, saaledes at Størrelsen 
aftager, jo nærmere de komme Ventralfladen, Fig. 23, 3, 3. 
Udenom denne 2den Rekke er der en 3die, ligeledes 
halvrund Række af 5 Polyper, hvis Kroppe ere fra 35—40"" 
lange, 10”” tykke; Tentaklerne af Kroppens Længde; ogsaa 
I den inderste Række er der 
disse sees 
her er Forholdet saaledes, at jo mere Polyperne nærme sig 
Ventralfladen, jo kortere blive de, Fig. 23, 4, 4, 4. Disse 
to ydre Rækker, der dannes af 10 laterale Polyper, omgive 
næsten hele Rachis, idet begge Rækker slutte sig sammen, 
saa at kun Ventralfladen i en Bredde af 6”" er blottet. 
Den Polyp, der egentlig binder disse to Rækker sammen 
omtrent midt paa Dorsalfladen, er lidt mindre end de 
26 
round, and has a sarcosoma appearing through it, and is 
only 3"”” broad, up towards the sheath-formed dilation. 
This dilation is 170”” long, and becomes broader and broader, 
twisting itself spirally; and, at the point where it passes 
over into the rachis, it attains a breadth of 12”” (fig. 23, a). 
Both, the ventral and dorsal surfaces, are closely beset 
with zooids, which become more dispersed as they leave the 
sheath-formed dilation, and arrange themselves in a zooidal 
stripe on each side, extending a long way down the 
stem. 
The rachis carries 31 polyps, and is nearly round; 
it is a little flattened from the dorsal towards the ventral 
surface; and measures 26”” broad, 35”" high, and 80”” in 
circumference, at the point where the polyps have their 
origin (fig. 23, b). It has a rounded narrow extremity, 
which is 5”” broad, with a free margin towards the ven- 
tral surface (fig. 23, c). This latter, is a little convex, 
longitudinally, with a slight furrow along the middle, very 
narrow above, and everywhere, closely beset with zooids. 
The dorsal surface is a little concave at the middle, and 
somewhat arched, laterally, where it passes into the rather 
diagonally sloping lateral surfaces; and it forms with these, 
what we may call, a horizontal prism. From the dorsal 
surface, and the lateral surfaces, 8 lanceolate zooidal areas 
extend themselves between the polyps, (fig. 23, b, d) so 
that, the rachis is only devoid of zooids, at the parts where 
the polyps have their origin. 
The terminal polyp is situated, nearly, quite on the 
rounded extremity of the rachis, yet distinctly, on its dor- 
sal side. It is 15”” long, 5”” broad, and it's tentacles 
are 22”” long (fig. 23.1). Below, or behind it, at a dis- 
tance of about 1”", a small narrow polyp is seen, having 
a length of 8”"; and, it’s tentacles have, also, a length of 
8”: and below this polyp, in the same line, a larger polyp 
is situated, which is 23”” long, and 5”” broad, with the 
tentacles of same length as the body. These three polyps 
compose the centro-dorsal polyps. On each side of the 3 
central polyps, there are 14 polyps arranged in 3 series, 
the one outside the other. In the inmost series, there are 
4 polyps, of which, the greater number are 15”” long, 
with tentacles of the same length; one polyp alone, situated 
to the left of the terminal polyp, is only 5”” long, with ten- 
tacles 4”” long. This series may be designated dorso- 
lateral polyps (fig. 23, 2, 2). Outside these, a nearly 
semicircular series, consisting of 5 polyps, is observed on 
each side. These are of variable size; from 15—25”” long, 
with tentacles of the same length; and, arranged in such 
manner, that the size diminishes, the closer they approach 
to the ventral surface (fig. 23, 3, 3) Outside this second 
series there is a third series; also a semicircular series; 
of 5 polyps, whose bodies have a length from of 35—40””, 
and a thickness of 10””; with tentacles same of length as 
the body; here, also, the arrangement is such, that the 
nearer the polyps approach to the ventral surface, the 
shorter do they become (fig. 23, 4, 4, 4). These two 
exterior series; which are formed of 10 lateral polyps; sur 
