Af disse Afvigelser af Rachis er igjen den bilaterale Sy- 
metri for en stor Del afhængig. Vi have seet, at omend- 
skjønt den bilaterale Anordning egentlig er gjennemgaaende 
hos Alle, er der dog Exemplarer, hvor den skjuler sig saa 
godt, at den ved overfladisk Betragtning let kan oversees, 
imedens den hos yngre Specimina er let iømefaldende; og 
hvad nu Polyperne angaar, saa frembyde de jo mange 
Forskjelligheder ikke alene paa Exemplarerne sig imellem 
Saaledes finde vi store 
og smaa i den samme Kolom, hvilke ere forskjellige i 
Farve, eftersom de ere yngre eller ældre, ligesom Tentak- 
men endogsaa paa selvsamme Ntok. 
lernes Forhold til Polypkroppen varierer betydeligt. 
Zooider findes jo paa Alle; de have samme Form, 
der er ganske eiendommelig, idet de ere forsynede med en 
lang Tentakel, der kan ganske indtrækkes 1 den runde, kugle- 
formige Krop. Paa enkelte Exemplarer kan Tentakelen være 
indtrukken hos saagodtsom alle Zooider, og de ligne da 
almindelige Zooider hos Virgulariderne; paa andre er Tenta- 
kelen enten ganske eller mere eller mindre udstrakt, og 
da se de ud som lange nedhængende Papiller, Tab. VIII, 
Fig. 29. Det er sandsynligvis disse Lindahl ogsaa har be- 
mærket, og som han har kaldet *skaftet*, uden nærmere 
at beskrive dem. Men ihvorvel Zooiderne ere ens hos 
Alle 
udviklet — saa staa de dog snart tæt sammen, snart mere 
paa meget unge Exemplarer er Tentakelen kun lidet 
spredte paa de forskjellige Specimina. Endelig er Farven 
ogsaa temmelig variabel, især gjælder dette Polyperne; den 
brune Farve er dog Grundtonen. 
Dr. Lindahls to Exemplarer have, efter Alt at dømme, 
været meget unge; herpaa tyder Polypernes ‘Antal og Stør- 
relse, men hovedsagelig den Omstændighed, at han ingen 
Generationsorganer fandt hos dem. Vi have to Exemplarer 
af omtrent samme Størrelse som Lindahls, nemlig No. 5 
og 6; men hos disse, ligesom hos de 4 mindre, fandt vi 
heller ikke Kjønsorganer, imedens hos alle de øvrige, der 
havde en høiere Alder, fandtes Generationsorganer vel 
udviklede, dog saaledes, at hos enkelte (No. 7) havde kun 
de ydre Polyprækker fuldt udviklede Kjønsorganer; alle de 
øvrige Polyper hos dette Exemplar vare endnu kjønsløse. 
Men hos de fuldt udvoxne havde samtlige Polyper udvik- 
Paa Ellis's Exemplar have Kjøns- 
organerne visselig. været udviklede; han omtaler idetmindste 
nogle runde Legemer, som kan antages for Ae. 
lede Generationsorganer. 
Omendskjont baade Ellis’s og Mylius's Beskrivelser 
ere meget ufuldstændige og kunde heller ikke være andet, 
saasom enhver af dem kun havde et tørret Exémplar til 
deres Disposition, saa kan der dog ikke reises Skygge af 
Tvivl om, at vore Exemplarer ere identiske med deres, og 
at saaledes Ellis’s *Clusterpolype* og Mylius's ,.Neue grön- 
lömdische Thierphlanze“ er gjenfunden, og det i saamange 
vel konserverede Exemplarer, at de ikke paany skulle gaa 
tabte for Videnskaben. 
40 
actual terminal point. On these divergencis in the rachis, 
the bilateral symmetry, again, is, in a great degree depend- 
ent. We have seen, that although the bilateral arrange- 
ment, really, is present in them all, yet, there are specimens 
where it is so concealed, that on superficial examination, 
it may easily be overlooked, whilst, in the younger speci- 
mens it, prominently, meets the eye. In respect to the 
polyps; these too, also, present many divergencies, not only 
between the specimens themselves, but even in the polyps 
of one and the same stalk. For instance, we find large 
and small in the same colony, which very in colour, accor- 
ding as they are younger or older, whilst, also, the pro- 
portion between the tentacles and the body of the polyp 
differs greatly. ; 
Zooids are, however, found on them all, and these 
have the same quite peculiar form, inasmuch as, that they 
are furnished with a long tentacle, with is capable of being 
retracted into the circular bullet-shaped body. In some 
specimens, the tentacle can be retracted in nearly the whole 
of the zooids, and they, then, resemble the common zooids 
in Virgularide. 
or more or less, partially, extended, and they then resemble 
long pendant papille (Pl. VIII, fig. 29). It is, presum- 
ably, these, that Lindahl has also observed, and which 
In other specimens, the tentacle is, entirely, 
he has called *skaftet*, without, however, more minutely, 
describing them. But, although, the zooids are alike in 
all, yet, the tentacle is, in young specimens, only little deve- 
loped; and further, they are situated, oftentimes, compactly, 
oftentimes more dispersed, in the different specimens. 
Finally, the colour is, also, rather variable, and this is 
specially so, regarding the polyps. Brown colour is, how- 
ever, the prevailing tone. 
Dr. Lindahl’s two specimens have, to. all appearance, 
been very young; the number and size of the polyps point 
to that; but, mainly, the circumstance, that he did not 
observe generative organs in them, leads to that conclusion. 
We have two specimens of about similar size as Lindahl’s 
viz. No. 5 and 6, but, in these, as well as in the 4 smai- 
ler ones, neither have we observed sexual organs; whilst, 
in all the others which had a more advanced age, gener- 
ative organs, well developed, were observed; but yet, im 
individuals (No. 7) the outer series of polyps, alone, had 
fully developed sexual organs. All the other polyps in 
this specimen, were, as yet, sexless; but, in the full grown 
individuals, the whole of the polyps had developed genera- 
tive organs. In Ellis’s specimen, the sexual organs have 
evidently been developed; at all events, he speaks of some 
round bodies, which he assumes. to be ova. 
Although both Ellis’s and Mylius’s descriptions are 
very incomplete, and could not well be otherwise, seeing, 
that each of them, had at their disposal, only, one dried 
specimen; yet, there can not be raised the shadow of a 
doubt, that our specimens are identical with theirs; and, 
that therefore, Ellis’s *Clusterpolype*, and Mylius’s “Neue 
gronliindische Thierphlanze“, are now rediscovered, and 
IN so many well preserved specimens, that they are not 
likely, again, to become lost to science. 
