partiet af Bugfladen; men er paa den øvrige Del af Krop- 
pen betydelig smalere. KG 
Fra den ydre Flade af Bindevævslaget paa lane 
udgaa Chitinpigge, Fig. 4, 5, der ere’ cylindriske. hule med 
en noget bredere Grunddel, Fig. 4, a. 5, a, og en lidt 
krumbøiet, smalere tilspidset fri Ende, Fig. 4, b. 5, b, for- 
synet med en fin rund Aabning. Indvendig ere de be- 
klædte med) Epithel, F ig. 4, ¢, 5.'c, der forlænger sig op 
imod Spidsen, og udvendig ere de forsynede med en Skede, 
Te, 2 å 8 d, som er Fortsættelsen af Cuticula, der her 
er uden Chitinpapiller. 
Ved Grunden af enhver Pig, og omfattet af denne, 
sees. en næsten rund, temmelig stor Kjertel. Fig. AG Då, 
der bestaar af en Bindevæysmembran. beklædt 
med runde Celler, Fig. 4, f, 5. f, og fra hvis hvælvede 
Del udgaar Udførselsgangen, Fig. 4, g. der løber op igjen- 
nem Piggens Hulhed, Fig. 4, h, 5, g, og munder ud just 
der, hvor dennes Epithelbekledning ophører, Fig. 4. 2, 5, h. 
Kjertelens Indhold var en seig, kornet, vandklar Masse, 
som vi et Par Gange saa i Piggens Aabning. 
indvendig 
, Paa indvendige Flade af Piggens Skede, ved 
dennes Grund, insererer sig mange Muskelfibre, Fig. 4. k, 
5, 7, der have en skraa Retning nedenfra opad, indenfra 
udad. og som ere Grene af Ringmusklerne, Fig. 4, 1. 
den 
Umiddelbart til Bindevæyslagets indre Flade støder 
5 | 2 3 
Muskellaget, der dannes af Ring- og Længdemuskler. 
Ie, 8 GA distinkt adskilte fra 
- hverandre, staa tættere sammen i Glans, 
rige Kropsdel, og ligge 
Længdemusklerne, 
Ringmusklerne, ere 
end paa den øv- 
nærmest Corium. 
Fig. 2. a. ligge indenfor Ringmusk- 
lerne, ere stærkere end disse og udgjøre 25 1 Glans; 
dele sig i to paa det Sted, hvor denne gaar over i Krop- 
pen, saaledes at denne Del af Legemet bliver forsynet med 50. 
-»+ I ethvert af de haleformige Appendices derimod er 
der kun 14 Tængdemuskler, Fig. ?, b, der ere Fortsættel- 
ser frå enkelte af Kroppens saaledes. at hver 
ddie eller 4de Længdemuskel afgiver en til Appendicet.- 
men 
i Regelen 
Saavel Ring- som Længdemusklerne ere omgivne af 
en temmelig. fast Bindeveevsskede,. hvori spindelformige 
Bindevæyslegemer ere leirede. Enhver af disse . Muskler 
er sammensat af mange Bundter, 12—20, Fig. 3, f, der 
hver for sig er omgivet af en egen tynd Bindevævsmem- 
bran, Fig. 3, g, ligesom der imellem Bundterne er et med. 
Kjerner forsynet Bindeyeey, som egentlig er en Fortsættelse 
af den fælles Skede. 
Fibriller, som ere stribede paa skraa. 
ganske eiendommeligt Udseende, 
en By (do 
Paa store Exemplarer med  udspændt Hud er denne 
gittret og ligner Sipunculushuden. Den indyendige Flade 
af Kropshulheden beklædes af et flimrende Peritoneum, der 
væsentlig bestaar af Bindevæv. 
Muskelfibre. 
de faa et 
naar de ere overskaarne. 
hvorved 
hvor 
TI enhver Bundt er der en. Mengde: 
sees enkeltløbende 
_ viscid, 
each from each, 
. of fibrils, transversely striate, 
vous chord, accordingly ‘in the middle of the ventral sur- 
face: elsewhere on the body it is much narrower. 
From the outer surface of the layer of connective tissue 
on the glans (proboscis), spring a number of chitinous spikes, 
figs. 4, 5, cylindrical in form, hollow, broadest at base, 
figs. 4, a; 5,.a, and with a slightly curved, acumirtate free: 
extremity, figs. 4, b; 5 b, in which is seen a minute cir- 
cular opening. Internally, these spikes’ are invested with 
epithelium, figs. 4, c; 5 c, produced towards the point; exX- 
ternally, they ‘are furnished with a sheath, figs. 4, d; 5 d, 
the continuation of the cuticle, which is destitute. tte ot © 
chitinous papillæ. 
In the hollow of every spike, at Ane base, is seen an 
almost round, comparatively large gland, figs. 4, e; 5 e, 
composed of connective tissue, covered internally with 
round cells, figs. 4, f; 5 f; and from the arcuate portion 
of these issues the excretory canal, fig. 4, g, which, passing 
up through the hollow of the spike, figs. 4, h; 5, g, disem- 
bogues exactly: where the epithelial integument of the lat- 
ter terminates, figs. 4, 7; 5, h. The gland’ contained a 
granulous, pellucid substance, which we observed: 
once or twice in the aperture at ‘the nee extremity of the 
spikes. 
On the inner surface of. the sheath, 
inserted numerous muscular fibres, figs. 4, Å; 5, 2, protend- 
ing obliquely — upwards from below, outwards from within; 
they are branches of the annular muscles, fig. 4, I. 
Contiguous to the surface of the connective 
membrane, extends the muscular layer, composed of annular 
at its base. are 
inner 
and löngitudinal muscles. 
oF a are distinctly separate, 
more closely arranged in the glans than 
elsewhere throughout the trunk, and adjoin the ‘corium.’ 
The longitudinal muscles, fig. 2, a, lymg underneath the 
are stronger than the latter. They number 
25 in the glans, dividing dichotomously where that organ 
meets the trunk, which is furnished therefore with 50. 
Each of the caudiform appendages has only 14 longi- 
tudinal muscles, fig. 2, 0, continuations of those in the 
trunk, every 3rd or:4th of which is as a rule produced to 
an appendix. 
Both the annular and the nl museles are 
invested with a sheath of comparatively firm connective tis- 
sue, throughout which are dispersed fusiform corpuscles of 
connective tissue, fig. 3, a. These muscles are all of them 
built up of numerous fascicles, from 12 to 20, fig. Sh Ho 
each enveloped in a separate covering of thin connective tissue, 
fig. 3, g; and in between the fascicles extends, too, a layer 
The annular muscles. fig. 
annular muscles, 
. of nucleal connective tissue, which, in a strict sense, is a contin- 
In each faséicle are numbers 
which gives them, on being 
cut through, a most characteristic appearance, fig. 3..h. . 
In large examples, the skin, when distended, is tes- 
selated. and resembles the skin in Sipunculus.. The inner 
surface of the perivisceral ‘cavity is invested with a ciliated 
peritoneum, consisting chiefly of connective tissue, in whieh 
protend isolated namusenlet fibres. 
uation of the common sheath. 
