253 
Subordo Rhizocephala. 
Fam. Peltogastridae. 
Gen. Sylon, Kroyer, 1855. 
Danske Vid. Selsk. Forhandl. 
82. Sylon Hymenodorae, G. 0. Sars. 
(PI. XX, Fig. 1(5, 17). 
S ' jlon Hymenodorce, G. 0. Sars, Crustacea & Pycnogonida nova Exp. 
Norv., No. 47. 
Subordo Rhizocephala. 
Fam. Peltogastridae. 
Gen. Sylon, Kroyer, 1855. 
Danske Vid. Selsk. Forhandl. 
92. Sylon Hymenodorae, G. 0. Sars. 
(PI. XX, figs. Ill, 17). 
Sylon Hymenodorae, G. 0. Sars, Crustacea & Pycnogonida nova Exp. 
Norv., No. 47. 
Artscharaeteristik. Legemet ovalt, trindt, lortil plud- 
^ '8 stferkt indsneret, dannende on smal, skjsevt fra selve 
lo ppon udgaaendo noget bugtet. Snabel eller Hals. Hefte- 
s ’*'en onigivet af en hornfarvet forty kket Rand. Genital- 
^gerne temmelig nter sanimen, paa Midten af selve 
10 PPen og paa den Side af samme, der er vendt fra Sna- 
^ en ‘ P’arven blegt kjodrod. Lamgden (incl. Snabelen) 
Specific Character. — Body oval, sac-like, anterior 
part abruptly instricted, forming a slender, somewhat in- 
dexed proboscis, or neck, issuing obliquely from the trunk 
itself. Disc of attachment surrounded by a. horn-coloured, 
inspissated margin. Genital orifices close together, in the 
middle of the body, and on the side turning from the 
proboscis. Colour a lightish pink. Length (including pro- 
boscis) 12’””*. 
Findested. Stat. 52. 
Bem.se rkninger. Bra do Ovrige bekjendte Former er 
1 °ne strax kjendelig ved den eiendommeligt udviklede sna- 
dtormigt forlamgede Forende, der er skarpt afsat fra den 
tVntlige Krop og danner ligesom en Stilk, hvortil denne 
er festet. 
Locality. — Stat. 52. 
Remarks. — From the other known forms, this animal 
may be immediately distinguished by its peculiar, probos- 
cidiform, elongate anterior extremity, sharply defined born 
the trunk proper, and forming, as it were, a peduncle, to 
which the latter is attached. 
Beskrivelse. Legemet er (se PI. XX, Fig. 16 og 17) 
0l h hos de Ovrige Arter af Shegten ovalt, sseklormigt, uden 
r G Kalkafieiringer, men skillor sig nuerkeligt derved, 
Hefteskiven ikke er sessil, men sidder paa Enden af en 
bugtet, snabelformig Forlsengelse, der udgaar i skraa 
Gning fra den forreste Del af selve Kroppen. Hette- 
t' Ven synes at vise den ssedvanlige Bygning og bar en 
J eligt markeret hornfarvet Chitinring. 
Kroppens Hud eller Happen er overalt glat og jevn 
uioget tynd og gjennemsigtig med Undtagelse af det 
!' a ,( 'liormige Parti, hvor den synes at vmre noget stserkere 
c hitiniseret. 
f r . , * hntrent midt paa den Side af Kroppen, der vender 
a ® Da belen sees 2 jevnsides stillede smaa, men tydeligt 
^ 5ende Dorer, som or de Aalminger hvorigjennem Hlggene 
01 re ttere Larverne udfores af Legemet. 
. Kropshulen er saagodtsom ganske tyldt at de volu- 
s Ill( ’ Se -Eggostokke, hvls talrige smaa rpdligt farvede H3g 
hfiier tydeligt igjennem Huden. Imellem de 2 Genital- 
j. 1,1 See ® et lidet kugleformigt, opakt hvidt Legeme, del 
'^ l1 ' ket op mod Huden, delvis loftende denne i Veiret 
( | la du tte Sted. Dette er den uparrede Saedstok, og fra 
tj. Ull( s ^- r *kker sig et noget fortykket, mindre gjennemsig- 
*~ r ® aa hd fortil mod Basis af Snabelen. 
Description. - The body (see PL XX, figs. 16,17) 
is as in the other species of the genus, oval, sac-like, 
without a trace of calcareous deposit, differing however 
remarkably in the disc of attachment not being sessile, but 
placed at the extremity of a long, inflexed, proboscidiform , 
violation, which, taking an oblique direction, issues from the 
foremost part of the body. The disc of attachment would 
appear to exhibit the usual structure, and has a distinctly 
marked horn-coloured chitinous ring. 
The skin of the body, or mantle, is everywhere smooth 
and even, as also very tenuous and translucent, except the 
proboscidiform part, that would seem to be a trifle more 
chitinized. 
About midway down the side of the body that turns 
from the proboscis, are seen, placed side by side, 2 small, 
but distinctly gaping pores - the orifices through which 
the ova, or rather the larvae, are extruded from the body. 
The perivisceral cavity is well-nigh entirely filled with 
the voluminous ovaries, whose numerous, small, reddish- 
coloured eggs shine distinctly through the skin. Between 
th e 2 n-enital pores is observed a small, globular, opaquish- 
white corpuscle, close to the skin, which in part it tends 
to lift This is the spermatic vesicle, whence proceeds an- 
teriorly toward the base of the proboscis a slightly inspis- 
sated, less translucent band. 
