Onchnesoma glaciale, n. sp. 
Tab. I, Fig. 15—20. 
Legemets hele Lærigde paa de største Exemplarer er 
omtrent 105””, 
Kroppen er 35”” lang, 
2”m bred, cylindrisk, glat, 
elindsende, med en næsten tapformig Bagende og en vand- 
klar Hud, der paa den bagerste Kropsende er yderst spar- 
somt besat med meget smaa uregelmæssig stillede Papiller, 
198, 15, 184 
Snabelen er omtrent dobbelt saa lang" som Kroppen, 
ender knopformig med den runde Mundaabning i Midten, 
Fig. 151, Den forreste Fjerdedél af Snabelen er for- 
synet med mange regelmæssige, temmelig tætstaaende Ræk- 
ker Hager, der tage deres Begyndelse strax bagenfor Mund- 
aabningen og ere kun lidet krummede, Fig. 19. 
Hagernes Basaldel er fra 0,040—0,060”” bred og 
deres Hoide er fra 0;045—0,064™", Fig, 18, 20. De ere 
bleg gulbrune, hule, have en næsten trekantet Basis og en 
mod Huden vendende Spids, forsynet med en fin Aabning, 
Fig. 18, 19. Den hule Grunddel optager for en Del Hud- 
kjertelen. 
Analaabningen er rund, noget foran Snabelgrunden, 
Fig. 16, a, og lidt bagenfor den sees en 
mentalorganet. 
Aabning for Seg- 
Den vandklare Hud hår en bred Cuticula, som er fin- 
stribet og hvis Linier lobe kredsformig om Dyrets Legeme, 
Fig. 17, a, 18, a; indenfor Qverhuden er Epithellaget, der 
er smalt og dannes af en Række cylindriske Celler, Fig. 
, b, 18, b, der med et yderst smalt Bmdeveysstratum, 
Fig. c, ere bundne til Muskelhuden, som bestaar af de 
sædvanlige to Lag, Ring- og Længdemuskler, 
sig ved Hjælp af Bindevæv 
186), Inne, 0, ah & 
som hver for 
danner en sammenhængende 
I Fpithellaget findes en Mængde temmelig store 
Kjertler, der have en noget konisk Figur, og hvis brede 
Del hviler paa det smale Bindeveeyslag, saa at det ser ud, 
som om den støder umiddelbart til Rimgmuskelhuden, Fig. 
17, f, 18,c. Den smalere, noget afrundede Del rager langt 
op i den klare Cuticula, Fig. 17, g, hvor den ender i Ud- 
førselsgangen, som aabner sig næsten tragtformig paa Hu- 
dens Overflade, Fig. 17. h. Disse Kjertler dannes af en 
Kapsel, der egentlig er en Fortsættelse 'af det smale Binde- 
vævslag, og som indvendig er beklædt med Celler, Fig. 17, 
2, 18, d; Kjertlerne ere opfyldte af en seig Vædske. 
Der er kun en Retractor, som udspringer fra Midten 
af Kroppen med en noget bred Rod, der paa enkelte Exem- 
plarer havde et lidet Indsnit, Fig. 16, b; den smalner da 
strax af og løber fortil langs Bugfladen til Mundaabningen, 
‘Onchnesoma glaciale, n. sp. 
PI. I, figs. 15—20. 
The whole length of the 80 in the largest speci- 
mens about 105””, Trunk 35”” long, 2”” broad, eylindrie, 
smooth, lustrous, the posterior extremity having mueh the 
shape of a faucet. 
Skin ‘hyaline, at the maskene extremity of the trunk 
very spafingly furnished with minute, 
papilla, figs. 15, 151. 
The proboscis, about twice as long 
nodular at the terminal extremity, with the round buccal 
aperture in the middle, fig. 15. The anterior fourth of 
the proboscis is furnished with numerous regular, compar- 
atively closely arranged series of chitinous hooks, but 
slightly bent, which take their origin a little posterior to the 
buccal aperture, fig. 1% 
‘The basal portion of these ungueal spiculæ, or hooks, 
measures from 0,049” to 0.060”” in breadth; their height 
is from 0.0457” to 0.064”, figs. 18, 20. They are hollow, 
and pale yellowy-brown in colour; the base is almost tri- 
angular, and the point, turned towards the skin, furnished 
with a minute orifice, figs. 18, 19. The hollow basal por- 
tion is partly occupied by the tegumentary gland.: 
Anal opening round, plaeed a little anterior to the 
base of the proboscis, fig. 16. @; and about the same distance 
posterior to it is seen a small opening, or pore, for the 
segmental organ. 
The hyaline skin has a broad, finely striated cuticle, 
the striæ completely encircling the body of the animal, figs. 
17, a; 18, a. Underneath the cuticle extends the epi- 
thelial layer, which is narrow, and built up of a series of 
cylindric cells, figs. 17, 0; 18,0, webbed by an exceedingly 
narrow stratum of connective tissue, fig. 17; c, to the mus- 
cular integument, consisting of the two ordinary layers of 
annular and longitudinal muscles, each of which constitutes 
by means of Mg tissue a continuous Caen 
covering, fig. 17, d, e. 
Tee the epithelial layer are disper sil a number 
of comparatively large glands, somewhat conical in form, 
the broad portion of which, resting on the narrow layer of 
connective tissue, gives them the appearance of being in 
direct contact with the annular muscular integument. figs. 
17, f; 18, c. The narrow, somewhat rounded part pro- 
jects far up into the cuticle, fig. 17, g. where it terminates 
in the excretory canal, which disembogues through an.almost 
funnel-shaped opening on the surface of the skin, fig. 17, h. 
These glands consist of a capsule, which, strictly, is a con- 
tinuation of the narrow layer of connective tissue, invested 
on its inner surface with cells, figs. 17. 7; 18, d: the glands . 
contain a viscous fluid. 
There is only one retractor, springing from the nfiddle 
of the body, with a broadish root, which in some of the 
specimens had a slight incision, fig. 16, b; it immediately 
begins to taper, the ventral surface 
irregularly scattered 
as the trunk, 
protending along as 
