lem disse Celler, dels ved deres Grund findes 1 større 
og mindre Mængde isolerede, storé, kuglerunde eller pære- 
dannede Legémer, der ere 0,026"” brede, bestaa af en tyk, 
gjennemsigtig Membran, have .en stor Kjerne med Kjerne- 
legeme, og et kornet seigt Indhold, der holdes sammen i 
en Klump efter at være presset ud af Legemet, Fig. 10, 
d, d. De runde Legemer have et balvmaaneformigt Indsnit 
> paa den Side, der vender ud mod Cuticula, Fig. 25, a, og 
i dette Indsnit formene vi at have bemærket en rund Aab- 
ning, der stundom var udfyldt af det seige Indhold, Fig. 
10, c, ¢ De aflange pæreformige Legemer have en Udfør- 
selsgang, der gaar op imellem Epithelcellerne og kan for- 
følges lige ud: til Cuticula, Fig. 10, d, d. 
Disse Legemer findes saagodtsom overalt i Huden, 
men i størst Mængde ere de dog paa Mundskiven rundt 
om Tentakelgrunden, hvor de ligge Side om Side. Vi 
anse dem for encellede Kjertler, der afsondre Slim og 
høre Fpithellaget til, ihvorvel vi fandt enkelte hist og her 
i det Epithelet tilgrendsende Bindevæv. Omendskjont 
disse Organer ere, saavidt os bekjendt, enestaaende hos de 
hidtil undersøgte Holothurider, kunne vi dog ikke betvivle, 
at deres Funktion er at forsyne Huden med den Slim, 
hvoraf der findes en saa stor Mengde paa Legemets Over- 
flade. 
Dr. Teuschert har i Huden hos Holothwria tubulosa 
fremstillet aflange Celler imellem Epithelcellerne, hvilke 
han antager for at være Slimkjertler; ogsaa vi have seet 
disse; men have ikke fundet, at de i nogen væsentlig Grad 
adskille sig fra det Epithel, hvor imellem de findes. Og- 
saa Semper” har paavist aflange Celler i Bindevævet, som 
han kalder Slimeeller; disse findes jævnligen i Bindevævs- 
lagene hos Slægterne Trochostoma, Irpa og Kolga; men vi 
kunne ikke antage dem for Kjertler, da de, som vi tid- 
ligere have antydet, ere Bindevævslegemer, der formentlig 
tjene til at opretholde Bindeveevet?. 
Umiddelbart til Bpithelet, men indenfor dette, sto- 
der .Bindevævslaget, der er temmelig bredt, hyalint og 
forsynet med en Mengde Bindeveeyslegemer, Fig. 10, e, e, 
der paa enkelte Steder ligge tæt ved hinanden; de have en 
forskjellig Form, snart ere de ovale med en eller to Ud- 
løbere, snart næsten runde, og snart have de et kornet 
Indhold, og svare da ganske til Sempers Slimeeller. Det 
er ganske mærkeligt, at Bindevævslaget er gjennemgaaende 
hyalint, meget kjærnerigt, uden at være fibrillært, hvilket 
ikke er almindeligt for Holothuridernes Hud, der jo altid 
har et tykkere eller tyndere Lag fibrillært Bindevæv. * 
1 Jenaisehe Zeitschrift, 10 Band, pag. 558. Jena 1876. 
? Reisen im Archipel der Philippinen, 2 Theil, 1 Band, pag. 
Leipzig 1868. ; 
3 Nyt Magazin for Naturvidenskaberne, 24de Bind, pag. 231. Chri- 
stiania 1878. 
165. 
vid tubulosa, among the cells of the epithelium, 
cells, which he conceives to be mucous glands; we have 
“a 52 
Semper,” too, 
termination, tig. 10, 6. Dispersed between the cells and 
at their occur an indefinite of large, 
isolated, globose or pyriform corpuscles, 0.026”” in breadth. 
These corpuscles consist of a -thick diaphanous membrane, 
bases, number 
investing a-large nucleus and a nucleolus, the contents of 
which, a viscid, granulous substance, if squeezed out, will 
adhere together in a lump, fig. 10, d. d. The globular 
corpuscles exhibit a lunate incision on the part facing the 
cuticle, fig. 25, a; and in this incision there would appear 
to be a circular aperture, sometimes filled with the afore- 
said glutinous mass, fig. 10, ¢, ¢. The ovate, pyriform cor- 
puscles are provided with an excretory canal, which, pro- 
tending upwards .between the cells of the epithelium, may 
be traced straight to the cuticle, fig. 10, d, d. 
The skin is almost everywhere studded with these 
corpuscles; they are most numerous however on the buc- 
cal disk, bordering the base of the tentacles, where in- 
deed they approximate, being there placed side by side. 
We regard these corpuscles as secretory unicellular glands 
belonging to the epithelium; a few do, however, occur every 
here and there in the connective tissue adjoming that 
layer. These organs are, we conceive, peculiar to the 
present species, having never, so far as we are aware, 
been observed in any of the known Holothwriide; yet their 
function must assuredly be to furnish the skin “with the 
mucous secretion so copiously diffused over the surface of 
the body. _ oy 
Dr. Teuscher! has figured in the skin of Holothu- 
ovate 
also discerned these cells, but have failed to detect any 
essentially characteristic feature distinguishing them from 
the cells of the epithelium, among which they are dispersed. 
has shown the occurrence of ovate cells 
in the connective tissue, which hé terms mucous cells; they 
are commonly characteristic of the connective tissue in the 
genera Tyochostoma,-Irpa, and Kolga; but we cannot agree 
in deeming them glands, since, as we indicated on a former 
occasion, they must be merely corpuscles of connective 
tissue, to which they are probably in some manner subservient.? 
Adjoining, but within, the epithelium, extends the 
layer of connective tissue, rather broad, hyaline, and fur- 
nished with numerous éorpuscles of connective tissue, fig. 10, 
e, e, which, in places, are crowded together; they vary in form, 
some being ovate and some almost spheroid; others contain a 
granulous substance, and hence are the exact analogue of 
Semper's mucous ells. It is remarkable that the layer of 
connective tissue in this species should be invariably hyaline, 
abounding in corpuscles, without being in the slightest 
degree fibrillous, a feature not hitherto met with in the. 
skin of known Holothwriide, which is always distinguished 
by a layer of fibrillous tissue, more or less thick. 
1 Jenaische Zeitschrift, 10 Band, pag. 558. J@na 1876. 
2 Reisen im Archipel der Philippinen, 2 Theil, 1 Band, pag. 165. 
Leipzig 1868. 
3 Nyt Magazin for Naturvidenskaberne, 24de Bind, pag. 231. Chri- 
stiania 1878. Pr 
