Tab. X, Fig. 
Tab. XI, Fig. 
: plader 
10. 
1 
12. 
13. 
14. 
Lo 
18. 
il), 
. Ankyroderma Jeffreysu, 
. Stenkanalen 
gjennembrudte 
krone at Trochostoma 
boreale, forstørrede. 
De elliptiske vinrøde Kalklegemer af 
Tr. boreale, stærkt forstørrede. 
Rundagtige, gule Kalklegemer af Tr. 
borcale, stærkt forstørrede. 
med 
Ankyroderma Jeffreys i naturlig Stør- 
relse. 
Kroppens forreste Ende med Mundski- 
ven, seet en face, forstørret. a den 
glatte og lidt hvælvede mdre Del af 
Mundskiven; b de rørformige Forlæn- 
gelser paa den ydre Del af Mundskiven; 
c Tentaklerne 1 de aflange Gruber; d 
Cromitnipemillent 
Et Stykke af Dyrets bagerste Kop, 
forstørret. I Huden sees stjerneformige 
Legemer. 
aabnet efter 
Rygfladen, lidt forstørret. a Tvermusk- 
ler, samt de i Huden i Grupper leirede 
runde elliptiske  vinrøde 
Legemer; b Længdemuskler; c Rectum; 
d Kloaken, fra hvis forreste Del udgaa 
Tarmappendices; e det venstre Tarm- 
appendix; f det høire Tarmappendix; 
g Polis Blære; h Kjonsorganet; 7 Sten- 
kanalen med Madreporpladen. 
smaa, eller 
med Madreporpladen af 
Ankyroderma Jeffreysii, 
forstørret. da Kalknet, 
b Kanalen, der her deler sig 
seet fraoven, 
der omgiver 
Kanalen: 
”Å WO). 
Samme Figur, seet fra Undersiden. 
Stenkanalen med den begyndende Madre- 
porplade hos et yngre Individ. 
Et Stykke Hud, forstørret; af et ældre 
Dyrs bagerste Ende, hvori sees de smaa, . 
runde eller aflange vinrøde Kalklege- 
der danne ligesom et sammenhæn- 
Lag, under hvilket 
Kalkplader 
udløbere og Krone. 
mer, 
gende lagttages 
med Side- 
Et Stykke Hud, hvori sees de forskjel- 
lige Kalklegemer, forstørret. 
5 spatelformige Kalkstave, fra hvis 
Midte hæver sig et Anker, ‘og imellem 
hvilke sees vinrøde, forskjelligformede 
Kalklegemer, forstørrede. a Spatelens 
Skaft; b dens Blad; c Ankerstokkens 
Basis; d. Ankerkloen med tre Takker 
paa dens ydre Rand. 
92 
Pl. XI, fig. 
10 
18. 
19. 
The elliptic, calcareous corpuscles, 
disk, front aspect; magnified: 
form, with corollæ, occurring, in Trocho- 
stoma boreale; magnitied. 
of a 
vinous red, in Tr. boreale, highly magnified. 
Yellow, roundish calcareous corpuscles 
in Tr. boreale, highly magnified. * 
Ankyroderma Jeffreysti, natural size. 
of body with oral 
@ smooth 
and slightly arcuate inner portion of 
oral disk; 6 tubular prolations on outer 
portion of oral disk; ¢ tentacles in. the 
oblong cavities; d genital papilla. 
Anterior extremity 
Part of posterior extremity of body, 
magnitied. In. the skin are seen stellate 
corpuscles. 
Ankyroderma Jeffreysii, opened dorsally; 
slightly magnified: @ transverse muscles, 
and the small — round or elliptic — 
of a vinous red, that occur 
in the skin; 0 longitudinal ‘muscles: C 
rectum; d cloacum with intestinal appen- 
corpuscles, 
dices protending from anterior portion; 
e left intestinal appendix; / right. 
g vesicle of Poh; h 
organ; 7 sand canal with madre- 
in- 
testinal appendix: 
generative 
porie, body. 
Sand canal with madreporic body in 
Ankyrodermæ Jeffreys, viewed from 
magnified: å calcareous network 
surrounding the canal; b the 
it divides dichotomously. 
above, 
canal where 
Same parts viewed from beneath. 
Sand canal with incipient madreporic 
body in a young specimen: 
Strip of skin (magnified) from posterior. 
extremity of a mature specimen, show- 
ing the small — round or elliptic — 
calcareous corpuscles, of a vinous red, 
that constitute an almost continuous 
layer, under appear perforate 
calcareous plates with lateral offshoots 
and corollæ. 
A piece of the skin, 
which 
in which are shown 
' the different calcareous corpuscles, mag- 
nified. 
Five spatulate caleareous rods, from the 
middle of which spring as many anchor- 
shaped prolations, and between which 
are seen the calcareous corpuscles of 
different form and vinous red in colour; 
magnified: a shaft of spatula; 6 expan- 
sion of spatula; c base of the anchor; 
d fluke of the anchor with three cogged 
teeth on outer margin. 
