- udbredt Netværk med store Masker. 
Paa Expeditionen blev der kun fundet det ene Exem- 
plar, som vi har havt til vor Undersøgelse. Paa dette 
Exemplar var Huden brusten, og endel af Tarmkanålen 
udfalden; men da Dyret var temmelig stort og godt con- 
serveret, kunde lagttagelserne dog anstilles med temmelig 
Nøiagtighed. Hvad vi nedenfor levere, er følgelig kun 
nogle Tillæg og Bemærkninger til Dr. Théels Afhandling 
over hans Myriotrochus Rinku; thi det har destoværre ikke 
været os muligt at erholde Huxley's Arbeide over Chirodota 
brevis. 
Legemet er cylindrisk, noget smalere i den bagerste 
Ende, 60”” langt, 15”” bredt paa det Tykkeste. Huden, 
der er glat, gjennemsigtig, saa de indre Dele sees, er for- 
nemmelig paa Rygsiden besat med smaa Hjul, der som 
hvide, glindsende Punkter sees med blotte Ømme. 12 finger- 
formig forgrenede Tentakler, der vel kan trækkes ind i 
deres egen Stilk, men ikke ind i Kroppen, saa at de ganske 
skjules. 
Huden bestaar af en glasklar, strukturløs Overhud 
(Cuticula), der dækker Epithellaget, som «dannes af Oylin- 
derceller. Indenfor dette er et temmelig bredt Lag hyalint 
Bindeveey, hvori findes en stor Mængde forgrenede Binde- 
vævslegemer, indeholdende en større eller mindre Kjerne, 
omgivet af Protoplasma, fuldkommen lig dem, som vi have 
omtalt hos Myr. Rinku, Fig. 5, a.  Udløberne korrespon- 
dere hyppig med hverandre, saa derved fremkommer et 
Denne Anordning af 
Biidevævslegemerne har ikke saa ganske lidet tilfælles med 
det saakaldte Slimvæv hos høiere Dyr. 
: Det hyaline Bindevæv gaar over 1 et tydeligt udpræget 
fibrillært, hvori Fibrene ligge lagvis, Fig. 5, 6, b, med 
mellemliggende Lag hyalint Bindevæv, Fig. 5, c,c. Det 
er væsentlig i dette de ovenomtalte forgrenede Bindeværs- 
celler findes; men de saaes ogsaa — dog meget sparsomt 
— 1 de fibrillære Lag. Disse danne tilsammen et næsten 
dobbelt saa bredt Belte, som det hyaline Bindevæyslag. 
Det fibrillære Bindevæv støder umiddelbart til Ringmusk- 
lerne, der ikke afbrydes af Længdemusklerne eller Radial- 
nerverne, men gaa rundt hele Kroppen. 
' 
De 5 Længdemuskler, der fortil fæste sig paa den 
udvendige hule Flade af Radialstykkernes Processer, og 
bagtil omkring Analaabningen, ere enkle og bundne til 
. Ringmusklerne ved Bimdevæv. Hele Muskellaget er beklædt 
af Peritoneum med et flimrende Bpithelovertræk. Fra 
dette, især fortil ved Kalkringen, findes de af Théel om- 
talte Legemer, der rage frit ind i Kropshulheden. Foruden 
de af ham afbildede to Former findes der ogsaa flere 
andre, der nærme sig noget de af os nævnte hos Myr. 
On the Expedition, one individual only was met with, 
which we have had submitted to us for examination. The 
skin of this specimen was cracked in places, and part of 
the intestinal canal had dropped out; the animal being 
however rather a fine specimen, and in a good state of pre- 
servation, comparatively accurate observations could not- 
withstanding be instituted.’ A few additional data, supple- 
mentary of Dr. Théel’s Memoir on his Myriotrochus Fink, 
is therefore all we purpose furnishing here; for Professor 
Huxley's treatise on Chivodota brevis was unfortunately not 
to be had in any of our libraries. 
The body is cylindric, a trifle slenderer at the poste- 
rior extremity, and measures 60”” in length, its greatest 
thickness being 15””. The skin, which is smooth, and so 
transparent that the inner organs can be distinctly seen 
through it, exhibits, more especially on the dorsal surface, 
numerous small rotated corpuscles, visible to the naked eye 
as white, lustrous pomts. The animal is furnished with 12 
digitated tentacula, which admit of being retracted within 
their own stem, but not into the body, so as wholly to 
conceal them. 
The skin 
ticle, .covering 
consists of a crystalline, structureless cu- 
the epithelial layer, which is composed of 
cylindric cells. Underneath the latter extends a rather 
broad layer of hyaline connective tissue, throughout which 
are dispersed large numbers of ramosé corpuscles .of connec- 
tive tissue, each with a nucleus. varying in magnitude, sur- 
rounded by protoplasma, exactly similar to those we noticed 
in our deseription of Myr. Rinki, fig: 5, a. The ramifications 
frequently correspond, each with éach, thus forming an 
extensive large-meshed network. This arrangement of the 
corpuscles of connective tissue has not a little in common 
with the mucous tissue, as it is called, in animals of 
higher organization. 
The hyaline connective tissue coalesces with another, 
exceedingly fibrillous, the fibrils being disposed in layers, 
fig. 5, b, b, with imterjacent layers of hyaline connec- 
tive tissue, fig. 5, c,c. It is chiefly the latter m which 
occur the ramose cells of connective tissue described above ; 
but they were also observed — though in very limited numbers 
— in the fibrillous layers. These constitute together a 
membranous belt, nearly twice as broad as the hyaline 
layer of connective tissue. , The fibrillous tissue is con- 
tiguous with the. annular muscles, which are not intersected 
by the longitudinal muscles or by the radial nerves, but 
eo right round the body. 
The 5 longitudinal muscles, which, anteriorly, are 
attached to the outer hollowed surface of the processes 
issuing from the radial plates, and, posteriorly, to the 
margin of the analopening, are simple, and webbed to the 
annular muscles by connective tissue. Over the whole of 
the muscular layer extends the peritoneum, invested with 
a ciliated epithelial tunic. Here, anteriorly in particular, 
near the calcareous ring, begin to occur the corpuscles 
noticed by Dr. Théel, which project freely into the peri- 
