Fig. 60, 1, ere Sidevæggene beklædte med transverselle 
Muskler, medens i Ventralkammeret. Fig. 60,1, have Side- 
væggene Længdemuskler. I Sidekamrene har den ene Væg 
transverselle, den anden longitudinelle Muskler, Fig. 60. 
Svæleet er langtfra saa foldet, som Tilfældet er hos 
to} to} ; 
Polypen, Fig. 57, c. 60, &; det har imidlertid den samme 
J ; , » Kh; 
histologiske Bygning; kun synes det ydre Epithellag at være 
to) JO toy) v Jd to) 
tykkere, Fig. 60, h, og dets Celler at være mindre, Fig. 601, 4. 
 Svælgets øverste Del smalner af og gaar over i den lidt 
aflange Mund med to tykke Læber, imedens det nedad 
har en fri Ende, hvorfra udgaa to Gastralfilamenter, Fie. 
b) to} ? le 
57, e, som ere temmelig lange og naa lige ned til Bunden 
af Zooidens Mayehulhed. Denne forlænger sig i en smal 
Kanal, der gaar over i Coenenchymets Tverkanaler. 
Zooiderne tilfore altsaa det indre Kanalsystem 1 Stokkens 
Sarcosoma Sovand, som vistnok maa udgjore et betydeligt 
Kvantum, naar Hensyn tages til Zooidernes overordentlig 
store Mængde. 
Naar Zooiden er stærkt sammentrukken, danner den 
en næsten kuglerund Forhøming, i hvis Midte sees en 
liden, rund Aabning eller aflang Spalte, Fig. 56, b, og paa 
et enkelt af vore Exemplarer ere saagodtsom alle Zooider 
paa den Vis sammentrukne; kun ved en skrupuløs Under- 
søgelse findes enkelte, der have Tentakelen halvt udstrakt. 
Saasnart Tentakelen udstrækkes noget, forlænger Kroppen 
sig, Fig. 56, c, og er den fuldt udstrakt, har Zooidekroppen 
en ovoid Form, Fig. 56, d. Tentakelen er bevægelig i 
næsten alle Retninger; fra dens Sider udgaa lange, papil- 
løse Pinnuler, der give den et grenet Udseende, Fig. 56, /f. 
Ikke hos alle findes disse Pinnuler, men naar de findes, 
og det er meget hyppigt, have de samme Bygning som 
Tentakelen, ere hule, korrespondere med Tentakelens Hul- 
hed og kunne forkortes og forlænges efter Omstændighederne. 
Nogen Aabning paa deres afrundede Ende kunde ikke iagttages. 
Figur 56 giver et godt Billede af disse mærkelige Zooider 
1 deres forskjellige Form,-alt eftersom de ere mere eller 
mindre udstrakte. 
Kalkaxen strækker sig fra Stokkens Bund til dens 
øverste Ende. Den har sim største Tykkelse paa den 
øverste Del af det bulbøse Parti. hvorfra den smalner af 
saavel opad som nedad. I sin største Længde er den 
firkantet med 4 dybe Furer, af hvilke den paa Ventralfladen 
er noget videre end de øvrige, samt 4 afrundede Hjørner, 
Fig. 61. Axen bliver i dens øverste nederste Del alt 
mere og mere rund og taber ganske sme Furer, Fig. 62. 63. 
I den nederste Halvdel af Bulbus ligger Axen i Dorsal- 
kanalen, hvor den omtrent 207” fra Bunden gjør en let 
Bøining mod Høire, Fig. 62, hvorpaa den paany bøier sig 
o 
og 
55 
(fig. 60, g). These muscles are covered with similar epithe- 
lium to that, which covers the inner wall of the polyp's 
body. The arrangement of the muscles is, the same as 
that previously spoken of as pertaining to the polyp. In 
the zooids. there is, also, a symmetrical order, thus: — in 
the dorsal chamber (fig. 60, e), the lateral walls are clad 
with transversal muscles, whilst, in the ventral chamber 
(fig. 60, m), the lateral walls have longitudinal muscles. 
In the lateral chambers, the one wall has transversal, and 
the other, longitudinal muscles (fig. 60). 
The gullet is not nearly so much folded, as is the 
case in the polyp (figs. 57, c, 60, åk); it has, however, the 
same histological structure, only, the exterior layer of 
epithelium appears to be thicker (tig. 60, Åh), and the cells 
to be smaller (fig. 60',7). The superior part of the gullet 
contracts, the 
aperture with two labiæ, whilst, it also has, an inferior 
and passes into somewhat oblong oral 
free extremity, from which, two gastral filaments issue 
fic. 97, ey; these are rather long, and reach right down 
ten ? 5) kan o> 
to the bottom of the zooid’s ventral cavity. This is 
prolonged into a narrow canal, which passes over into 
the transverse canals of the sarcosoma. The  zooids, 
consequently, introduce water into the inner ductiferous 
system of the sarcosoma of the stalk, and this must, certainly, 
be in considerable quantity, when the extraordinary abund- 
ance of zooids is borne in mind. 
When the zooid is strongly contracted, it forms a 
nearly spherical prominence; in whose middle, a small round 
aperture, or oblong fissure is observable (fig. 56, 0), and, 
our specimens, almost all of the zooids are 
in one of 
contracted in this way; only, on vigilant examination, 
are a few found, which have the tentacle half extended. 
elong- 
of the 
move- 
Whenever the tentacle is somewhat extended, the body 
ates (fig. 56, c), and when fully extended, the body 
zooid has an ovate form (fig. 56,d). The tentacle is 
able in almost all directions; and from it’s sides, long papil- 
lous pinnules issue, imparting a ramous 
(fig. 56, /f). 
they are found and that is, 
appearance to it 
These pinnules are not found in all, but when 
very frequently; they have 
the same structure as the tentacle, and are hollow, and 
they the cavity of the 
can be retracted or extended, according to circumstances. 
correspond with tentacle, and 
No opening on their rounded extremity could be obsery- 
Fig. 
able zooids in their various forms, according, as they are 
ed. 56 gives a good illustration of these remark- 
more or less extended. 
The 
the stalk, to it’s superior extremity. 
the base of 
It is thickest at the 
superior part of the bulbous portion, from which point, it 
For 
the greater part of it’s length, it is quadrangular, and has 4 
salcareous axis extends itself from 
diminishes in thickness, both upwards and downwards. 
deep lateral grooves, of which, that on the ventral side is 
than the has 4 
rounded corners (fig. 61). The axis becomes in its superior 
somewhat wider others, and it, also, 
and inferior parts, gradually, more and more round, and 
it’s grooves quite disappear (figs. 62, 63). In the inferior 
half of the bulb, the axis les in the dorsal canal, where, 
