bred med 30”” lange Tentakler. Udenom disse samtlige 
Polyper paa venstre Side staa de 5 store, laterale Polyper, 
der have samme Størrelse som de tilsvarende paa høire 
Side, hvortil de fuldstændigt slutte sig og danne dermed 
en sammenhængende Ring, Fig. 28. 
Man vil nu af ovenstaaende Angivelse over Polyper- 
nes Stilling bedst kunne erkjende, at uagtet det ved 
en løselig Betragtning er umuligt at finde nogen bilateral 
Symetri, er der dog tydelige Spor efter en saadan, der ved 
den stærke Fordreining og Udvidning af Rachis, som igjen 
er betinget af Kalkaxens Dreminger, har tabt meget af 
Karakteren. Opgives den bilaterale Symetri, som man for 
endel kan gjøre saavel paa dette Exemplar som paa No. 
8, 9 og 11, saa vil man ved lidt Imagination faa Poly- 
perne til at være stilledei Ringe rundt Rachis, saaledes at 
de store, laterale Polyper danne den ydre Ring, at de 
dorsal-laterale Polyper danne en Ring indenfor denne, hvor- 
ved den anden Rings Polyper staa afvexlende imellem den 
ydre Rings, og saa fremdeles; men jo længere man kommer 
ind mod Centrum, jo vanskeligere bliver det at fastholde 
Ringdannelsen; thi Uregelmæssigheden i Stillingen bliver 
altfor stor. 
Polyperne have forøvrigt samme Karakterer som de 
Foregaaende. Naar undtages et Par af de mindste 
Polyper, have Alle udviklede Generationsorganer. De 
ere Hunner, have Æg i alle Udviklingsstadier og enkelte 
at Umbellula encrinus 
I enhver Kapsel er der i Regelen 
Embryoner, saa det er sandsynligt, 
føder levende Unger. 
kun et Æg. 
Zooiderne danne 1 Regelen flere Rækker nedover paa 
hele Stilken, saaledes staa de paa den bulbøse Del indtil 
dennes nederste Trediedel 1 4, lidt uregelmæssige Rækker 
saavel paa Ventral- som Dorsalsiden; paa de laterale 
Flader ere de sjeldnere. 
Det maa bemærkes, at paa samtlige de Exemplarer, 
hvor Zooiderne strakte sig nedover Stilken, var Tentakelen 
i Regelen indtrukken, medens det modsatte var Tilfældet 
paa den skedeformige Udvidning og Rachis, — her var i 
Regelen Tentakelen fuldstændigt udstrakt, hvorved disse Dele 
fik ligesom et laaddent Udseende. 
Findested. 
Station No. 31. Paa Station No. 176 fandtes et 
Stykke af Axen af et lidet Exemplar. 
series of 3 polyps is observed (fig. 28, 10, 10, 10), of 
which, the posterior one (fig. 28, e), is 50”” long, and 
8”” broad, and the tentacles measure 35”” in length. The 
other two diminish somewhat, in size, so that, the anterior 
one of them, measures 35”” in length, 57” in breadth, and 
the tentacles 30”” in length. Outside the whole of these 
polyps, and on the left side, the 5 large lateral polyps are 
situated; these are similar in size, to the corresponding 
ones of the right side, with which they completely unite, 
and form, thus, an uninterrupted ring (fig. 28). 
From the above description of the arrangement of 
the polyps, it will be readily apparent, that upon a super- 
ficial examination only, it is impossible to detect any bi- 
lateral arrangement, but, that nevertheless, there are dis- 
tinct traces of such a bilateral symmetry; that, owing to 
the strong twisting, and enlargement of the rachis; which 
again, 1s conditional on the twisting of the calearous axis; 
has lost- much of its distinguishing characteristics. If we 
abandon the bilateral symmetry, which we may in a mea- 
sure do, both, relative to this specimen, as well as No. 
8, 9, and 11; we may, by a slight stretch of the imagina- 
tion, fancy the polyps arranged in rings round the rachis, 
in such manner, that the large lateral polyps form the 
outer ring, and the dorso-lateral polyps form a ring inside 
it, by which, the second ring’s polyps become placed, alter- 
nately, between the outer ring’s polyps, and so on thronghout ; 
but, the nearer we approach to the centre, the more diffi- 
cult does it become, to maintain the annular formation; 
because, the irregularity in the arrangement becomes 
excessive. 
The polyps have, otherwise, the same characteristics 
as the polyps of the preceding specimens, If we except a 
couple of the smallest polyps, all of them have, developed 
generative organs. They are females, and contain ova in all 
stages of development, and also, a few embryos, so that, it is 
probable, that Umbellula encrinus reproduces living young 
In each capsule, there is, as a rule, only one ovum. 
The zooids on the whole of the stem, downwards, 
ones. 
generally form several series, so that, on the bulbous part 
and to its lowest third part, they are situated, in 4 some- 
what irregular series, both on the ventral and dorsal side. 
They are not so numerous on the lateral surfaces. 
It must be remarked, that in all the specimens, 
where the zooids extended themselves down along the stem, 
the tentacle was, generally, retracted, whilst, the opposite was 
the case on the sheath-formed enlargement, and the rachis. 
There, the tentacle was, asarule, completely extended, by 
which these parts acquired a shagey appearance. 
Habitat. 
Station No. 31. At station No. 176, a portion of 
the axis of a small specimen was obtained. 
