Blodkar. Hos Hamingia have vi ikke iagttaget noget saa- 
dant Kar, uagtet vi have ved vellykkede Tversnit havt An- 
ledning til at skjænke dette Punkt vor fulde Opmærk- 
somhed. 
Generationsorganerne. 
Vi have tidligere omtalt to Æggebeholdere (Uteri), 
der have deres Leie i den forreste Del af Kropshulheden, 
Fig. 16, h, h. De ere ægformige, 7”” lange, 4”” brede; 
enhver af dem er forsynet med en Udførselskanal, Fig. 16, 
2, 17, a, som er rund, 3”” lang, omtrent 1”” tyk, og som 
gaar ud igjennem de tidligere beskrevne krumbøiede Pa- 
piller paa Bugfladen, i hvis Spids den aabner sig. - 
Foruden Udførselskanalen har enhver Æggebeholder 
en tragtformig Kanal, der ligger over Udforselsgangen, 
hvortil den er fastvoxet 1 en Strekning af omtrent 2””, 
Fig. 16, &. 17, b; men bliver fri idet den bøier sig indad 
og nedad imod Bugfladen, Fig. 16, 1, 17, c, og udvider sig 
nu saaledes, at den frie Ende danner Tragtens brede Del, 
Fig. 16, m, 17, d. Denne frie Ende, hvis Rand er ind- 
skaaren, foldet og besat med Cilier, Fig. 17, e, danner Ind- 
gangen til Kanalen, som fører ind til Æggebeholderens 
Hulhed. Hele Tragtens indre Flade, ligesom Kanalen, er 
beklædt med et flimrende Epithel. [gjennem Tragten føres 
de i Kropshulheden svømmende Æg ind i Æggebeholderne, 
der vare fuldproppede af fuldt udviklede Æg, Fig. 16, h,h. 
Saavel Udførselskanalen, som Tragten med dens Ind- 
førselsgang bestaar af et fast Bindevævslag, hvis indre mod 
Lumenet vendende Flade er beklædt med et cilierende Fpi- 
thel; men hvis ydre Flade støder til en meget stærk Mu- 
skelhud, der bestaar af Længde- og Ringfibre, hvilke strække 
sig udover selve Æggesækkene, der dannes af en temmelig 
fast, men næsten vandklar Bindevæysmembran, gjennem- 
krydset af Muskelfibre. Saavel Alggeseekkene, som de med 
dem i Forbindelse staaende Kanaler ere udvendig beklædte 
med Peritoneum. 
og 
ÆAggebeholderne ere fæstede til Bugfladen ved enkelte 
tynde, temmelig lange Bindevævstraade; forresten hænge de 
frit i Kropshulheden. 
Æggestokken er fæstet til en Feld af Bugmesenteriet, 
Fig. 16, n, n, er smal, fladtrykt-baandformig, og strækker 
sig fra den yderste Ende af Rectum, hvortil den fæster 
sig, til noget foran Midten af Kropshulbeden; den følger 
Centralnervestrængen, som den næsten ganske skjuler, Fig. 
16. 
Æggene udvikle sig i Follikelgrupper; saaledes fand- 
tes i den forreste Del af Æggestokken nogle isolerede Fol- 
likler, Fig. 16, 0, 0, hvori det begyndende Æg med Kim- 
blære og Kimflæk fandtes, — fuldkommen lig den Udvik- 
lingsmaade, der for endel er antydet af Lacaze-Duthiers; 
in a blood-vessel. In Hamingia, we failed to detect any 
such vessel, notwithstanding we were happy in our trans- 
verse sections of the chord, and took advantage of the 
opportunity afforded to give this point our full attention. 
Generative .Organs. 
We have previously had occasion to mention two ova- 
rian pouches (uteri), placed in the anterior portion of the 
perivisceral cavity, fig. 16, h, h. They are ovate in form, 
77 long, 4” broad, and furnished each with an eferent 
duct, fig. 16,7; 17, a, which is round, 3”” long, and about 
1”” thick; it passes out through the arcuated papillæ on 
the ventral surface, previously described, at the point of 
which: it opens. 
Exclusive of this eferent duct, 
funnel-shaped canal, protending above the genital duct, 
with which it is connate for about 2””, figs. 16, k; 
17, 1, becoming however free as it curves inward and 
downward in the direction of the ventral surface, figs. 16, 
1; 17, 6, and then expanding in such wise, that the free 
extremity constitutes the broad part, or mouth, as it were, 
of the funnel, figs. 16, m; 17, d. This free extremity 
which has the margin folded, incised, and furnished with 
cilia, fig. 17, e, constitutes the entrance to the canal lead- 
ing to the uterine cavity. The whole inner surface alike 
of the funnel-shaped opening and of the canal itself, is in- 
vested with vibratile epithelium; and through this opening 
it is, that the egg floating im the perivisceral cavity is 
exuded into the uteri, which in the specimen examined 
each uterus has a 
- were distended with fully mature ova, fig. 16, h, h. 
Both the eferent duct and the funnel-shaped canal, 
with its entrance-passage, are built up of a firm-textured 
layer of connective tissue, the inner surface of which, facing 
the lumen, is clothed with ciliated epithelium; its outer 
surface adjoins an exceedingly strong muscular membrane, 
composed of longitudinal and annular fibres, protending out 
beyond. the uterine pouches, the walls of which consist of 
comparatively firm-textured, but almost hyaline connective 
tissue, intersected by muscular fibres. The uterine pouches, 
and the ducts and canals with which they are connected, 
have, investing them externally, a peritoneal tunic. 
The uteri are webbed to the ventral surface by a 
few slender and comparatively long filaments of connective 
tissue; for the rest, they depend freely in the perivisceral 
cavity. 
The ovary, attached to a fold of the ventral mesen- 
tery, fig. 16, n, n, is narrow, depressed, riband-shaped, and 
protends from the outer extremity of the rectum, whereto 
it is webbed, a little anterior to the middle of the peri- 
visceral cavity, and accompanies the central nervous chord, 
almost entirely concealing it, fig. 16. 
The ova develop in follicular groups; in the an- 
terior part of the ovary were seen, for instance, a few 
isolated follicles, fig. 16, 0, 0, containing rudimentary ova, 
with a germinal vesicle and a germinal speck, — their 
mode of development being that in part suggested by 
