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52
tilløbende Tarmslynge; h Fortilløbende
Tarmslynge; i Rectum; le ’Nervestrængen.
Tab. I, Fig. 17. Tversnit af Huden, forstørret, a Cuticula;
b Epitbellag; c Bindevævslag; d
Ringmuskler; e Længdemuskler; / Hudkjertelens
Grunddel; g Dens afrundede Spids; h
Udførselsgangen; i Kjertelens indre
Epi-tbelbeklædning..
— 18. Tversnit af. Snabelens Hud, besat meel
Hager, forstørret, a Cuticula; b
Epithel-laget; c Kjertel; d Kjertelens Epithel; e
Hage.
— 19. Den forreste Del af Snabelen med ’sine’
Hager," forstørret.
— 20. Hager, seet fra forskjellige Sider, for-
størret.
Tab. H, Fig. 7. Endeskjoldet af Aspidosiphon armatum,
forstørret. a Randplader; b Runde, mere
centrale Plader; c -5—6 Ringe besatte med
Chitinplader.
— 8. Det forreste Skjold, forstørret, a Skjol-
. dets Randplader; b Furefi imellem disse;
c De runde, ophøiede Plader.
— 9. Hagerækkerne paa Snabelen, forstørret.
— 10. Hagerne, forstørret.
— 11. Et Stykke Hud af Aspidosiphon armatum,
seet fraoveri, forstørret. a Porer for
Kjertiernes Udførselsgang; b Chitinplader.
— 12. Tversnit af Huden af Aspidosiphon arma-
tum, forstørret, a Cuticula; b Chitinplade;
c Epithellag; d Hudkjertel; e Dens
Udførselsgang ; / Bindevævslag; g
Ringmuskler; li. Længdemuskler.
— 13. Et Stykke Hud af Aspidosiphon armatum,
seet fraoven, stærkt forstørret: et Cuticula;
b Chitinplade; c Aabning for
Hudkjertelens Udførselskanal.
— 14. Den indre Flade af det forreste Skjold
med dets Muskelapparat, forstørret, a
Sidemuskler; b Centrale Muskler; c De
forreste Muskler.
— 21. Stephanostoma Hanseni, naturlig Størrelse.
a Krop; b Bagenden; c Snabelens Grund;
d Den forreste Del af Snabelen; e
Snabelens Hals; / Mundskiven med den
centrale Mundaabning; g Tentakler; h
Anal-äabning.
— 22". Den forreste Ende af Snabelen med
Mundskiven og Tentakelkraven, forstørret, a
Mundskiven; b Mundaabning; c Tentakler; d
De i Grupper siddende Papiller.
testine; g circumvolution passing
backwards; li circumvolution passing forwards;
i rectum; li nervous chord.
Pl. I, fig. 17. Transverse section of skin, magnified: a
cuticle; b epithelial layer; c layer of
connective tissue; d annular muscles; e
longitudinal muscles; / basal portion of tegu-.
inentary gland; g rounded extremity of the
gland; h excretory duct;’ i epithelial tunic
investing inner surface of gland.
— 18. Transverse section of skin of proboscis,
studded with chitinous hooks, magnified:
a cuticle; b epithelial layer; c a gland; d
epithelium of the gland; e hooks.
— 19. Anterior portion of proboscis, with the
hooks, magnified.
— 20. Hooks, viewed in different positions, mag-
nified.
Pl. II, fig. 7. Terminal shield of Aspidosiphon armatum,
magnified: a marginal plates; b
röund-plates, more central in position; rings
covered with chitinous plates.
— 8. Foremost shield, magnified: a the marginal
plates; b furrows between them; c the
round, prominent plates.
— 9. Series of hooks on the proboscis, magnified:
— 10. Two of the hooks, magnified.
— 11. Strip of skin of Aspidosiphon armatum,
viewed from above, magnified: a pores for
the excretory duct of" the gland; b
chitinous plates.
— 12. Transverse section of the skin of Aspido-
siphon armatum, magnified: a cuticle; 6
chitinous plates; c epithelial layer; d
tegumental^ glands; e excretory duct; / layer
of connective tissue; g annular muscles;
h longitudinal muscles.
— 13. A piece of the skin of Aspidosiphon arma-
tum, viewed from above, highly magnified:
a cuticle; b a chitinous plate; c opening
for the excretory canal of the tegumentary
gland.
— 14. Inner surface of foremost shield, . with its
muscular apparatus, magnified: a lateral
muscles; b central muscles; c foremost
muscles.
.— 21. Stephanostoma Hanseni, natural size: a
trunk; b posterior extremity; c base of
proboscis; d anterior portion of proboscis;
e neck of proboscis; / buccal disk with th’e
buccal orifice in the centre; g tentacles;
h anal opening.
— 22. . Anterior’ extremity of proboscis, with the
buccal disk and tentacular collar,
magnified: a buccal disk; b buccal aperture; c
tentacles; d grouped papillae.
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