Tab. I, Fig. 14. 
18900, JOG 
Fig. 
15. 
16. 
bo 
Zooidestribens Begyndelse, forstørret. 
vk, Ventralkanalen; dk, Dorsalkanalen ; 
Ik, Lateralkanalerne. a, et Septum, 
der fæster sig paa Axeskeden; 0, et 
lignende Septum, der viser Delingen 1 
Sarcosomaet; c¢, Sarcosomaets  ydre 
Epithel; d, Zooidens Svælgrand; e, Zooi- 
dens Septulum; /, Gastralfilamentet ; 
g, Axeskeden, indenfor hvilken. Axen. 
Et Tversnit længere nede paa Stilken, 
forstørret. vk, Ventralkanal; dk, Dor- 
salkanal. «a, ydre Bindevæv; 0, Binde- 
vævsforlængelse; c, _ Laengdemuskler ; 
d, indre Bindevæv; e, Zooidens Mund- 
aabning; f, Zooidens Svælgrand, ragende 
ind i Sidekanalen; g, stilkede Gene- 
rationskapsler; mh, Axeskeden. 
Tversnit af Axens halve Diameter med 
Cuticula ; 
b, koncentriske Lag; ¢, radiære Fibre. 
sin Skede, forstørret. a, 
Tversnit af Axen med dens Skede, for- 
storret. ad, Ernæringskanaler i Skedens 
Veg; 0b, radiære Fibre; 
Lag 
d, det indre Lag af samme. 
c, det ydre 
af den elliptiske Centralstraeng ; 
Diibenia borealis, torstorret. 
Et Stykke af den samme, seet fra Bugen, 
forstorret. / 
Et Stykke af den samme, seet fra Ryg- 
gen, forstorret. 
Et Stykke af den samme, seet fra Ryg- 
gen, stærkere forstørret. a, den nederste 
Ende af Kalkpladen; 0, Membranen, 
der binder Kalkspiklerne sammen. 
En Polyp, opskaaren efter Længden, for- 
storret. a, Kalkspikelen paa Kroppen; 
b, Kalkspiklerne paa Tentaklerne. 
Polypkroppens Spikel, stærkt forstørret. 
En Spikel fra Tentaklerne, stærkt for- 
størret. 
Cladiscus Köllikert, forstørret. 
Et Stykke af den samme, seet fra Bu- 
gen, stærkere forstørret. da, Zooider. 
En Rekke Zooider, stærkt forstørret. 
a, Mundaabning; 0, Gastralfilament. 
74 
PI. 
IT, 
=n 
Se 
ER 
de 
15. 
16. 
bo 
(00) 
10. 
below the commencement of the zooidal 
stripe; magnified. vk, 'The ventral 
canal. dk, The dorsal canal. Jk, The 
lateral canals. a, A septum, adherent 
to the sheath of the axis. 6, A similar 
septum, exhibiting the division in the 
sarcosoma. ¢, The outer epithelium 
of the sarcosoma. d, Margin of the 
gullet of the zooid. e, Septulum of 
f, The gastral filament. 
g, The sheath of the axis, inside of 
which is the axis. 
Sectional aspect of the stem, lower 
down than the last named; magnified. 
vk, The ventral canal. dk, The dorsal 
External connective-tissue. 
b, Connective-tissue prolongation. c, Longi- 
tudinal muscles. 
the zooid. 
canal. | a, 
d, Internal connective- 
e, The zooid’s oral aperture. 
Jf, Margin of the gullet of the zooid 
projecting into the lateral canal. g. Ped- 
h, The 
tissue. 
unculated generative capsules. 
sheath of the axis. 
of the semi-diameter 
of the axis, with it’s sheath; magnified. 
a, Cuticula, b, Concentric layers. c, Radi- 
ating fibres. 
Sectional aspect 
Sectional aspect of the axis, with it’s 
sheath; magnified. da, Nutrient canals 
in the wallofthe sheath. 06, Radiating 
c, The exterior layer of the 
elliptic central cord. 
fibres. 
d, The interior 
layer of the same. 
Aspect of Diibenia borealis; magnified. 
Ventral aspect of a portion of the same ; 
magnified. . 
Dorsal aspect of a portion of the same; 
maenified. 
Dorsal aspect of a portion of the same; 
still more magnified. a, The inferior 
extremity of the calcareous plate. b, The 
membrane which binds the calcareous 
spicule together. 
Aspect of a polyp, disected longitudin- 
ally; magnified. da, The calcareous spic- 
ule on the body. 6, The calcareous 
spicules on the tentacles. 
Aspect of the spicule of the body of the 
polyp; greatly magnified. 
Aspect of a spicule of the tentacles; 
greatly magnified. 
Aspect of Cladiscus Kéllikert; magnitied. 
Ventral aspect of a portion of the same ; 
much magnified. a, Zooids. 
A series of zooids; greatly magnified. 
a, The oral aperture. 0, Gastral fil- 
ament. 
~Y 
