ah THE, ie) 
tay, June ate dl 
2 
bo 
OU 
bo 
di 
ree 
- traktorer. 
. Tversnit af. Huden, forstørret. 
Snabelens forreste Ende med Mundskiven 
og Tentakler. seet fra Siden, forstørret. 
a Store Tentakelerupper; 6 Enkelte Ten- 
takler imellem de store Grupper. 
Et Stykke af Snabelens Hud, seet '”fra- 
oven, for at vise Papillerne, forstørret. 
Tversnit af Huden, forstørret. .a Cuticula: 
b Iudsynkninger 1 Cuticula, 1 hvis Bund 
Hudkjertlernes Udforselsgang aabner sig; 
c Hpithellaget; d Hudkjertel; e Ring- 
muskler: f Længdemuskler. 
. Et Stykke af det nævnte Tversnit, stærkt. 
forstørret. a Cuticula; b Fordybning i 
samme. 1 hvis Bund Udførselsgangen for 
Hudkjertelen aabner sig; c Epithellaget: 
d Kjertelens Grunddel; e Kjertelens Spids: 
Jf Udtorselskanalen; g Epithelet, som be- 
klæder Kjertelens mdre Flade: h Binde- 
vævslaget. 
Stephanostoma Hanseni, 
gen; noget forstørret. 
Tarmen; *c Spindelmuskelens bagerste og 
forreste Ende; d Spindelmuskelen; e Rec- 
aabnet fra Ryg- 
a Spisereret; b 
tum; f Et Blodkar paa Spiserøret: g Det 
kontraktile Kar med blmde,- frit- 
hængende Ende: h Rygretraktor; 7 Seg- 
mentalorgan; fø Nervestræng;: 7 Bugretrak- 
tor: m Indtrukken Snabel. 
sin 
Et Segmentalorgan, forstørret. 
‘ovale tragtformige Aabning. 
a Den 
Nervestrængen med dens Svælgring, for- 
størret. a Nervestrængen med Sidegrene ; 
b Svælgringen; c Ryggangliet (Hjernen). 
Priapulus typicus, i naturlig Størrelse. 
a Nervestrængen. 
Den samme aabnet fra Ryggen. 
dens Længdemuskler; > Enkelte Længde- 
muskler, der gaa over i Tilhænget; c 
Mundhulen med Tandapparatet; d Ind- 
snøring paa NSpiserøret, hvorved Folden. 
påa den indre Flade dannes; e Længde- 
folder, paa Npiserørets indre Flade; /f 
'Spiserørets Overgang i Tarmen; g Tver- 
folder paa Tarmens indre Flade: h Rec- 
tum: 7 Alggestokken; / Dens Udførsels- 
gang; 1 Udførselsgangens Begyndelse ; m 
De lange Retraktorer;.” De korte Re- 
a Cuti- 
cula med Chitinpapillerne; b Epithellaget; 
c Bindeveyslaget; d Ringmusklerne; e 
Længdemusklerne med deres Skede; f Mu- 
«Den norske Nordhavsexpedition. Danielssen og Koren: Gephyrea. 
ao Hu 
Pl 
— 
Ir! 
=p) 
gio) 
| 
bo 
Or 
Anterior extremity of proboscis, with the 
buccal disk and the tentacles, side-aspect, 
magnified: å large groups of tentacles; b 
isolated tentacles dispersed between the 
large groups. 
Strip of skin of proboscis, figured as seen 
from «above, to show the papille, magnified. 
Transverse ‘section of skin, magnified: a 
cuticle; ) depressions in the cuticle, through 
the bottom of which opens the excretory 
duct. of the tegumentary glands; c epithe- 
lial layer; d tegumentary gland; e annular 
muscles; f longitudinal muscles. 
Part of the same transyerse section, highly 
magnified: å cuticle; b one of the depres- 
sions therein, through the bottom of which 
opens the excretory duct of the tegument- 
ary glands; c epithelial layer: d basal por- 
tion ‘of the gland; e extremity of the gland; 
jf excretory canal; +g epithelium investing 
the inner surface of the eland; h layer of 
connective tissue. 
Stephanostoma Hansen, viewed through the 
batk, slightly magnified: a æsophagus; b 
intestine; ¢ posterior and anterior extrem- * 
‘ities of fusiform muscle; d fusiform muscle; 
e rectum; f a blood-vessel of the cesopha-' 
gus; g the contractile vessel, with its cecal 
free depending extremity; h the dorsal re- 
tractor; i segmental organ; fø nervous 
chord: I the ventral retractor; mm probo- 
scis, invaginated. 
The segmental organ, magnified: a its oval, 
funnel-shaped opening. , 
its » pharyngeal 
ring, magnified: å nervous chord with sub- 
The nervous chord, with 
sidiary branchés; 6 pharyngeal ring; c dor- 
sal ganglion (brain). — 
Priapulus typicus, natural size: a, nervous 
chord. Ge 
Same animal, opened dorsally: a long- 
itudinal muscles of the skin; b isolated 
longitudinal muscles. passing into the ap- 
pendix; ¢ cavity of the mouth, with dental 
apparatus; d constriction of the cesophagus, 
producing a fold on’ the inner surface of 
the organ; e longitudinal folds on inner 
surface of esophagus; f passage of the 
oesophagus into the intestine; g transverse 
folds on inner surface of imtestine; Å rec- 
tum; 7 the ovary; Å its 'eferent duct; / 
origin of eferent ‘duct; m the long retrae- 
tors; m the short retractors, 
Transverse section ‘of skin, magnified: a 
cuticle; with chitinous papillæ; b epithelial 
layer; c layer of éonnective tissue; d annu- 
lar muscles;. .e longitudinal muscles, with 
S 
