indeslutter en Kjærne, som er indhyllet i en kornet Masse. 
Vi antage disse Legemer for encellede Slimkjertler, . 
der har sin særskilte Udførselsgang, som løber imellem Epi- 
thelcellerne for at udmunde paa Kroppens Overflade. Flere 
af disse Kjertler vare tomme, og da saaes Kjærnen meget 
tydeligt. 
Det hyaline Bindevævslag støder umiddelbart til Mu- 
skelhuden (Ring- og Lengdemuskler). 
Ringmusklerne, Fig. 9, f, gaa paa den forreste og 
bagerste Ende rundt Kroppen uden Afbrydelse, imedens de 
paa Midten af Legemet ere afbrudte af Radialnerverne og 
Længdemusklerne, og danne altsaa her Tværmuskler. Mu- 
skelbundterne ere temmelig brede og sammenbundne med 
et gjennemsigtigt Bindevev. Ringmusklerne danne paa den 
bagerste Ende en stærk Sphincter, der omgiver Anal- 
aabningen. 
Længdemusklerne ere fortil fæstede paa Radialstyk- 
kerne, strax bag Nerveudløbet, bagtil gaa de henimod 
Analaabningen, hvor de fæste sig paa selve Sphincter, idet 
enkelte Fibre udbrede sig paa denne. Muskelhuden er be- 
klædt af Peritoneum med sit flimrende Epithel. 
Fra Peritoneum udgaa paa den forreste Del af Krops- 
hulheden mange yderst smaa Legemer af forskjellig Form, 
der henge frit i Hulheden. Nogle ere korte, stilkløse, dels 
næsten kuglerunde, dels mere aflange og ere fra 0.009 — 
0.0127” lange og 0.005—0.009”” brede, Tab. VI, Fig. 10; 
andre ere meget mere langstrakte, stilkede. tildels eylinder- 
formede -med en bladdannet Yderende, Fig. 11, og ere fra 
0.084—0.069”” lange og 0.008—0.0047” brede. Alle disse 
Legemer bestaa af en tynd Hud, som beklædes af Epithel, 
hvis Celler ligge her meget spredte, Fig. 10, a, a, og ere 
de for Synaptiderne særegne Organer, hvis Function i lang 
Tid har været meget gaadefuld, og som endnu ikke er 
ganske opklaret. | 
Vore Undersøgelser af disse Organer ere foretagne 
paa Spiritusexemplarer, og kan forsaavidt være mangelfulde. 
Ved imidlertid at sammenligne dem med Leydigs, anstillede 
paa levende Exemplarer af Synapta digitata, og ved at 
sammenstille dem med Ludvigs Beskrivelse over *Vimper- 
- cellen” hos Comatulaerne, ere vi komne til den For- 
mening, at de som mere udviklede Flimmerorganer tjene 
til at sætte Kropsvædsken i end stærkere Bevægelse. Saa- 
vidt vore Undersøgelser strække, kunne vi med Bestemthed 
sige, at de ikke staa 1 Forbindelse med Kar, men ere fæ- 
stede ved. Bindevæv til Kropsvæggen, og have en afsluttet 
Hulbed, hvilket er overensstemmende med Johannes Miillers 
og Sempers lagttagelser. 
I det hyaline Bindevæv ere to Slags Kalkhjul leirede 
rundt hele Kroppen, og det paa en saadan Maade, at de 
0.0067” in length and 0.0087” in breadth, consist of a 
thin translucent membrané, mvesting a nucleus enveloped 
by a granulous substance. 
We regard these corpuscles as unicellular mucous glands, 
furnished with an excretory duct extending between the 
epithelial cells and opening on the surface of the body. 
Several of these glands were empty, and the nucleus could 
in that case be distinctly seen. 
The hyaline layer of connective tissue is connate with 
the muscular integument (annular and longitudinal muscles). 
The annular muscles, fig. 9, . ip encircle the body 
without interruption at the anterior and posterior extre- 
mities; in the middle, however, they are mtersected by the 
radial nerves and longitudinal muscles, forming here accor- 
dingly transverse muscles. The muscular fascicles are rather 
broad and webbed together by transparent connective tissue. 
At the posterior extremity, the annular muscles unite to 
form a powerful sphincter, surrounding the anal aperture. 
 Anteriorly, the longitudinal muscles are attached to 
the radial segments of the calcareous ring, immediately 
posterior to the point at which the nerves originate; po- 
steriorly, they proceed to the anal aperture, where they 
are attached to the sphincter, over which several of their 
fibres extend. The muscular membrane is covered by the 
peritoneum with its vibratile epithelial layer. 
From the peritoneum, on the anterior portion of the 
perivisceral cavity, extend numerous exceedingly minute 
corpuscles of divers forms, which project freely in the said 
cavity. Some of these corpuscles, measuring from 0.0097” 
to OOl2n7 ein length, andy irom 01005 to O;002zzarin 
breadth, Pl. VI, fig. 10, are short, non-pedunculate, and in 
form either almost globular or more or less oval; others, 
measuring from 0.0847” to 0.069”" in length, and from 
0:008”” to 0.0047” in breadth, fig. 11, are much more 
elongate, pedunculate, and in part cylindric with a foliace- 
ous extremity. All these corpuscles consist of a thin mem- 
brane, covered with epithelium, in which the cells lie 
far apart, fig. 10, a, a, and constitute organs peculiar 
to the Synaptide, whose function was long a puzzle to 
zoologists,, and the nature of. which is not yet satisfac- 
torily determined. 
Unfortunately, we haye had none but spirit-specimens 
in which to examine these organs; but, on comparing our 
results with those of Leydig, from observations instituted 
on living examples of Synapta digitata, and with Ludvig's 
description of the *vimper cell” in the Comatule, we are 
decidedly of opinion that, as vibratile organs in a more 
advanced stage of development, these cells serve to give 
increased rapidity of motion to the fluid circulating in the 
perivisceral cavity. Assuming our observations to be correct, 
we can safely affirm, that the organs m question have no con- 
nexion whatever with any kind of vessels, being attached’ 
by a membrane to the wall of the body, and haying a 
cavity, which is borne out by Millers and Semper’s in- 
vestigations. | 
Round the whole of the body two kinds of wheel-shaped 
spicules are embedded in the hyaline connective tissue, 
