vi senere skulle se, ogsaa paa Polyperne i en utrolig 
Mængde, og det tykke, gelatinøse Slim, der 1 levende Live 
indhyller disse Dele, lader sig derfor let forklare. Ectoderm- 
cellernes Indhold er tildels brunt pigmenteret; men dette 
Pigment er mere eller mindre intens, saaledes er det paa 
den bulbøse Del intensere end paa den øvrige Del af 
Stilken. 
hidtil fundet Slim- 
kjertler hos Pennatuliderne, ihvorvel næsten alle Søfjære, 
Saavidt os bekjendt er der ikke 
naar man tager dem op af Søen, føles slimede; men ikke 
hos nogen have vi iagttaget saa tykt, gelatinøst Overtræk 
som hos Umbellula encrinus, og derfor var det at vente, 
at der maatte findes særegne Organer for denne Afsondring. 
Det tør nok hænde, at man herefter ved Afbenyttelsen af 
Jodgrønt vil finde Slimkjertler hos mange Pennatulider; 
thi det er ikke sandsynligt, at disse Organer alene skulle 
findes hos Umbellula encrinus. 
Indenfor Ectodermet er et Lag fast, fibrillært Binde- 
yev, hvori findes spindelformede Bindevævslegemer med 
Kjerne, og hvis Udløbere tildels korrespondere med hin- 
anden, Fig. 37, c. 39, c. 40, ¢. Dette fibrillere Bindevæv 
støder til et meget bredt, hyalint Bindevævslag, der indta- 
ger hele den øvrige Del af Coenenchymet, og hvori der er 
større og mindre Spalter, der danne saavel Længde- som 
Tverkanaler. Lige ved den indre Rand af det fibrillære 
Bindevæv, eller der, hvor dette støder med det 
hyaline, findes i en enkelt Række, men Side om Side, 
Længdekanalerne, Fig. 36, b. 39, d. 
ere ikke lige vide; enkelte ere trangere end andre, og af 
sammen 
Disse Længdekanaler 
og til er en meget vid placeret imellem to eller flere trange, 
Fig. 39, e. 
lerne et listeformigt Fremspring, 
Det fibrillære Bindevæv danner i Længdekana- 
der mere eller 
mindre ind 1 Kanalen, Fig. 39, e. 40, d, ja ikke sjeldent 
forlænger dette Fremspring sig helt igjennem denne, hvor- 
rager 
ved den deles, og saaledes fremkomme de mindre Kanaler, 
der da intet Fremspring have, Fig. 39,d. Men ret hyppigt 
sees to saadanne Fremspring at rage temmelig langt ind i 
Lengdekanalen, der da sædvanligvis er meget vid.  Længde- 
musklerne ere fæstede ikke alene paa disse Bindevævslister 
men ogsaa paa Kanalens Sidevægge, Fig. 39, f. 40, f, og 
bestaa af temmelig stærke Fibre, hvorved Længdekanalen 
kan forkortes. Man ser Virkningen af disse Længdemuskler 
meget godt udvendigt paa Coenenchymet, hvor Kanalerne 
vise sig 1 fine Bugtninger langs hele Stilken; lettest iagt- 
paa dennes bulbøse Del. Længdekanalerne 
hele indre Flade beklædte med et Epithel, 
der bestaar af runde Celler med en klar, gjennemsigtig 
Membran og en rund Kjerne omgiven af fine, næsten klare 
Protoplasmakorn. Cellerne ere 0,008”” og Kjernen 0,002””, 
Fig. 40, g. Det hyaline Bindevævslag er meget bredt og 
danner et Net af Tverkanaler, der lobe i alle Retninger 
og give Coenenchymet sin svampede Karakter, Fig. 36, c. 
39, g. 40, h. 
af en stor Mengde fine Ernæringskanaler, som forgrene sig 
tages de dog 
ere paa deres 
Dette hyaline Bindevæv er gjennemtrængt 
nucleus was tinged green, and finally, in a few; a distinet 
excretory duct, whose aperture was funnel shaped (fig. 38, c), 
was seen. These glands are everywhere found, not only 
on the stalk, but, as we shall subsequently see, also, in 
incredible numbers on the polyps, and the thick gelatinous 
mucous, which in the live state enclosed these parts, becomes 
therefore easily explainable. The contents of the ectoderm 
cells are, partly, tinged brown, but the colour is variable 
in intensity, so that, for instance, at the bulbous part, it 
appears deeper than in the remainder of the stem. 
As far as we are aware, there have not, hitherto, 
been found, mucous glands in the Pennatulide, although, 
nearly all sea-pens feel slimy when taken out of the sea; 
but, in none, have we observed such a thick gelatinous 
covering as in Umbellula encrinus; and, it was therefore 
to be expected that special organs for this secretion would 
be found. It may probably happen, hereafter, that by the 
application of iodine green, mucous glands will be found 
in many Penatulidæ; because, it is not likely that these 
organs are found, exclusively, in Umbellula encrinus. 
Inside the 
fibrillous connective-tissue, in which spindle-formed 
ectoderm, there is a layer of compact 
con- 
nective-tissue bodies having a nucleus, are found, whose pro- 
longations, partly, correspond with one another (fig. 37 c, 
39 c, 40 c). This fibrillous connective-tissue abuts, on a 
very broad, hyaloid layer of connective-tissue, that occu- 
pies the whole of the remaining portion of the sarcosoma, 
and, in which larger and smaller fissures oceur, which form 
both, longitudinal and transversal canals. Exactly at the 
inner margin of the fibrillous connective-tissue, or, at the 
point where it unites with the hyaloid tissue, a single 
series of longitudinal canals placed side by side, is found 
(figs. 36, b, 39, d). These longitudinal canals are not 
uniformly wide; some are narrower than others; and, now 
and then, a situated between two 
The fibrillous connective 
tissue forms, a fillet-formed prominence in the longitudinal 
very wide one is or 
more narrow ones (fig. 39, e). 
canals, which projects more or less into the canal (figs. 
39, e, 40, d); indeed, this prominence prolongs itself, not 
infrequently, quite through the canal, which thus becomes 
the smaller canals which 
then, no prominence (fig. 39, d). Most frequently, however, 
two such prominences are observed, to extend pretty far into 
divided, and produces have 
the longitudinal canal, which, then, is generally very wide. 
The longitudinal muscles are attached, not only to these 
connective-tissue fillets, but, also, to the lateral walls of 
the canal (figs. 39, f 40 f); and consist, of rather strong 
fibres, by means of which, the longitudinal canals may be 
shortened. The effect of these longitudinal muscles is very 
well seen, externally, on the sarcosoma, where the canals 
appear in fine windings along the entire stem; they are, 
however, most easily, seen on the bulbous part of the 
stem. The entire inner surface of the longitudinal canals, 
is covered with an epithelium, consisting of round cells, 
having a clear transparent membrane, and containing a 
round nucleus, surrounded by minute, almost clear, proto- 
plasmic grains. The cells are 0,008” in width, and the 
