udgaa Prolongationer af Bindevæv imellem Nervefibrillerne, 
hvilke ere forsynede med Bindevævslegemer i stor Mengde. 
Man har her aabenbart et Perineurium svarende til det 
hos de høiere Dyr. 
Nervestrængen er sammensat af Nervefibriller i dens 
centrale Dele; og 1 dens Peripheri, altsaa nærmest Skeden, 
er et celluløst Lag, hvis enkelte Celler vare lidt aflange og 
forsynede med en Kjerne, uden at det var muligt at iagt- 
tage noget Protoplasmaindhold. 
Uagtet Centralnervestrængen ligger særdeles nær Le- 
gemets ydre Flade, synes den dog at være godt beskyttet 
mod ydre Indvirkninger ved det stærke Bindevævslag, som 
omgiver den, ved den tykke Bindevævsskede og endelig ved 
dennes mange Prolongationer imellem Fibrillerne. 
Fra Centralnervestrængen udgaa mange Grene til Hud 
og Muskler. Naar den er kommen fortil imod Svælget deler 
den sig i to Grene, der slaa sig omkring Spiserøret og 
danne derved Svælgringen, som er indesluttet i en Binde- 
vævsskede. 
Kjønnet er adskilt. Ælggestokkene ligge en paa hver 
Side af Endetarmen, ere langstrakte med bladformige Ind- 
skjæringer, Fig. 2, 7, og have en temmelig tyk, fast Ud- 
førselsgang, Fig. 2, k, der ligger overfladisk paa Rygsiden, 
tager sin Begyndelse et lidet Stykke bagenfor Æggestokkens 
frie afrundede Ende, Fig. 2, /, og aabner sig udad strax 
ovenfor Appendicet, Fig. 2, k. 
Paa hele Bugsidens Midtparti er et stærkt, bredt 
Mesenterium, der binder Æggestokken til Kropsvæggens 
indre Flade. Dette Mesenterium strækker sig langt fortil, 
bliver smalere og ender omtrent der, hvor Kropshulhedens 
bagerste Trediedel tager sin Begyndelse. 
Æggestokken dannes af en stor Mengde aflange, 
blæreformige Legemer med deres Udførselsgange, der aabne 
sig 1 den store Udførselskanal, hvis Lumen er temmelig 
vidt. Blærerne bestaa af en tynd Bindevævshud, der paa 
den indre Flade har et kjernerigt Epithel, hvori Æggene 
udvikle sig, og paa hvis ydre Flade saaes spredte Muskel- 
fibre, beklædte af Peritoneum. 
Udførselsgangene havde et meget stærkere Bindevævs- 
lag; Hpithelet, som beklæder den indre Flade, bestod af 
Cylinderceller, og paa Bindevævets ydre Flade var en rigere 
Mengde Muskelfibre. 
I mange af Blærerne vare næsten fuldt udviklede 
Æg, i andre vare Æg i tidligere Stadier, og i atter andre 
saaes ingen Æg, men kun Epithelbeklædningen. 
Hvad nu Hannens Kjønsorganer betræffer, saa kunne 
vi ikke meddele noget Væsentligt derom; thi Testiklerne 
paa det Exemplar, vi undersøgte, vare temmelig beskadi- 
gede; vi bleve dog overbeviste om, at vi havde med en Han 
at gjøre, saasom en Mængde ret vel vedligeholdte Sperma- 
tozoer med deres korte Haler iagttoges. 
\ 
produced filaments of connective tissue pass between the 
neryous fibrils, which are abundantly furnished with cor- 
puscles of connective tissue. We have here indubitably a 
true perineurvum, the analogue of that organ in more 
highly developed animals. 
The centre of the nervous chord consists of nervous 
fibrils, whereas the peripheral part, or that nearest the 
sheath, is a cellular layer, the cells composing it being 
slightly oblong in form, and furnished with a nucleus; we 
failed however to detect .any protoplasmatic contents. 
Although the central nervous chord protends in close 
proximity to the outer surface of the body, it would never- 
theless appear to be sufficiently well protected, viz. by the 
strong layer of connective tissue that surrounds it, by its 
thick membranous sheath, and by the numerous filaments 
produced from the latter between the fibrils. 
The central nervous chord sends off a great many 
branches to the skin and the muscles. Anteriorly, a short 
distance from the gullet, it divides into two branches, 
which, winding round the esophagus, form the pharyngeal 
ring, sheathed in connective tissye. 
The sexes separate. The ovaries — one on either 
side of the rectum — are elongate in form, with petaloid 
incisions, fig. 2,7, and have a firm-textured and comparatively 
thick eferent duct, fig. 2, k, protending close to the sur- 
face on the dorsal side; it takes its origin a little posterior 
to the free rounded extremity of the ovary, fig. 2, 0, and 
opens externally, immediately above the appendix, fig. 2, k. 
The medial portion of the ventral surface is wholly 
invested with a broad and strong mesentery, which webs 
the ovaries to the inner surface of the wall of the body. 
This mesentery, reaching a considerable distance forwards, 
gradually narrows, and terminates at the commencement of 
the posterior third of the perivisceral cavity. 
The ovary is built up of numbers of elliptical, vesicu- 
lar corpuscles, each with an eferent duct, opening into 
the great excretory canal, the lumen of which is compar- 
atively wide. The vesicles consist of thin connective tis- 
sue, haying its inner surface covered by nucleal epithe- 
lium, wherein the ova develop, and on the outer surface of 
which were seen isolated muscular fibres, invested with a 
peritoneal tunic. 
The eferent ducts had a much stronger layer of 
connective tissue; the epithelium clothing the inner sur- 
face, consisted of cylindrical cells; and on the outer surface 
of the connective tissue, the number of muscular fibres, too, 
was greater. 
Many of the vesicles contained almost fully mature 
ova; in some, the egg was in various stages of development; 
others exhibited no traces whatever of ova, being quite empty :. 
nothing was seen but the epithelial covering. 
As regards the generative organs in the male, we 
have nothing essential to communicate, since the testes 
in the specimen examined had been much injured; we felt 
convinced, however, that the individual in question was a 
male, having observed a considerable number of spermato- 
zoa, with their short caudæ, comparatively perfect. 
