De 4 store Længdekanaler have som sædvanligt sine 
4 Septa, der fæste sig paa Axeskeden, hyormed de smelte 
sammen, Fig. 13, a. I den bulbøse Del forgrene Septa- 
erne sig, idet de gaa over i Sarcosomaet, hvor de bidrage 
til Dannelsen af store Tverkanaler, Fig. 13, b. I den øv- 
rige Del af Stilken samt i Rachis foregaar ingen saadan 
Deling åf Septa. Disse bestaa af en tynd, hyalin Binde- 
vævsmembran, hvori findes en Mengde fine Ernæringska- 
naler, og paa hvis begge Flader er en Hpithelialbekleed- 
ning, dannet af lignende Geller som de, der beklæder den 
hele Kanal, og som ovenfor ere omtalte. I Stokkens øverste 
Del ere Sidekanalerne ganske sammenskrumpede; den ven- 
trale Knnal er noget videre end Dorsalkanalen. 
Generationsorganerne udvikle sig 1 Sidekanalerne. I 
Beskrivelsen af den ydre Form omtalte vi, at hvor de 
uudviklede Polyper ophøre paa Stilkens bulbøse Del, fin- 
des der paa hver Side en Række Zooider. Disse have en 
temmelig vid Mundaabning, Fig. 14,e, et eylindrisk Svælg, 
hvis nederste, frie Ende har en rund, tyk Rand, der rager 
ind 1 Sidekanalen, Fig. 13,d. 14, f. Fra hver af denne 
tykke Svælgrands Sider udgaar et temmelig bredt Sep- 
tulum, der fæster sig paa Sidekanalens Væg, Fig. 13, e, 
og hvortil et Gastralfilament er bundet, Fig. 13, f, hvis 
yderste Ende svømmer frit i Kanalens Fluidum. I det 
brede Septulum opstaa Kjønsorganerne og dannes af stil- 
kede Kapsler, Fig. 14, g, hvori Kjønsproduktet udvikler 
sig. De Exemplarer, vi undersøgte, vare Hunner, — der 
var Æg 1 alle Udviklingsstadier og i saa rigelig Mengde, 
at de hængte paa Septula som Drueklaser og opfyldte næ- 
sten fuldstændigt Sidekanalerne, Fig. 14. Desforuden saaes 
ogsaa enkelte Embryoner, der havde forladt Ægget og laa 
frit i Kanalen. Hvor denne Rigdom af Æg fandtes, var 
saavel Ventral- som Dorsalkanalen meget sammentrykket, 
Fig. 14, vk, dk; men i samtlige Kanaler kunde dog Flui- 
dumet cirkulere. Udvendig paa den bulbøse Del af Stil- 
ken viste den stærke Udvikling ef Generationsorganerne 
sig derved, at Overfladen var ujævnt udvidet og opsvulmet. 
Fig. 12, der er aabnet efter Ventraltladen, illustrerer hvor- 
ledes Kjønsorganerne udvikle sig i Sidekanalerne. Ven- 
tralkanalen og Axen a ere borttagne i den Strækning af 
Stilken, hvor Zooiderne indtage de før beskrevne Side- 
rækker, — og hvorved Dorsalkanalen, Fig. 12, b, bliver 
synbar. I de udvidede Sidekanaler sees de drueformigt 
udviklede Kjønsorganer, Fig. 12, c. De fuldt udviklede 
Polyper ere golde, medens 1 de to sidste Rækker af uud- 
viklede Polyper kun findes enkelte Generationskapsler, der 
ligeledes rage ind i Sidekanalerne for der at udvikle sit 
Kjønsprodukt. 
Vi have Grund til at antage, at Svavaslægten føder 
levende Unger, og saavidt vi have kunnet erfare, fødes Un- 
The 4 large longitudinal canals have, as usual, their 
4 septa; which are attached to the sheath of the axis, 
and with which they become fused together (fig. 13, a). In 
the bulbous part, the septa branch off as they pass over 
into the sarcosoma, and contribute to the formation of 
large transversal canals (fig. 13, 0). In the remainder of 
the stem, and also in the rachis, no such dividing of the 
septa takes place. The septa consist, of a thin, hyaloid, 
connective-tissue membrane; in which is found a multitude 
of minute nutrient canals, and on both of whose surfaces, 
there is an epithelium covering, formed of similar cells, 
to those which cover the entire canal; and which have 
already been spoken of. In the superior part of the stalk, 
the lateral canals are quite shrunk together. The ventral 
canal is somewhat wider than the dorsal canal. 
The generative organs develope themselves in the 
lateral canals. In the description of the exterior habit; 
we stated, that at the pomt on the bulbous part of the 
stem where the undeveloped polyps cease, there is found 
upon each side, a series of zooids. These have a rather 
wide oral aperture, (fig. 14, e) and a cylindrical gullet, 
whose lower free extremity has, a round, thick margin, 
which projects into the lateral canal (fig. 13, d. 14, f). 
From each of the sides of this thick gullet-margin; a 
pretty broad septulum proceeds, which attaches itself to 
the wall of the lateral canal, (fig. 13, e), and to which a 
gastral filament is secured, (fig. 13,/) whose outer extrem- 
ity floats free, in the secretion of the canal. The sex- 
ual organs originate im the broad septulum, and are 
formed of pedunculated capsules, (fig. 14,9), im which the 
sexual product developes itself. The specimens which we 
examined were females; there were ova in all stages of 
development, and in such abundant quantities, that they 
depended from the septula, like clusters of grapes, and 
almost, completely, filled up the lateral canals (fig. 14). 
Besides these, a few embryos which had forsaken the 
ovum, and lay free in the canal, were also observed. 
Where this wealth of ova was found, both the ventral and 
dorsal canal were much shrunk together, (fig. 14, v, k, d, k) 
but in all the canals, however, the secretion could circu- 
late. Outside, on the bulbous part of the stem; the great 
development of the generative organs became apparent 
from this; that the surface was unevenly dilated and swol- 
len. Fig. 12, in which the dissection is made from the 
ventral surface; illustrates the manner in which the sex- 
ual organs develope themselves in the lateral canals. The 
ventral canal and axis (@) are removed in that portion of 
the stem where the zooids assume the lateral series previ- 
ously described; and the dorsal canal (fig. 12, b) becomes 
thus, visible. In the dilated lateral canals, the grape 
formed developed sexual organs are observed (fig. 12, ¢). 
The fully developed polyps are sterile, whilst, in the two 
last series of undeveloped polyps, only a few generative 
capsules are found; these also, project into the lateral can- 
als, in order to develope there, their sexual product. 
We have reason to believe, that the genus Svava, 
gives birth to living young, and as far as we have been 
