137 
Fam. 7. Pasithoidse. 
Ki'oppen usegmenteret, med kort Pandedel. Snabelen 
ualinindelig stor, ikke bevsegeligt forbunden med Kroppen. 
Saxlemmer ganske mangle tide hos det fuldt udviklede Dyr. 
Folere og falske Fodder vel udviklede, begge 10-leddede 
og faestede tset sammen ind under Pandedelen. 
Bemserkninger. Den Slsegt, hvorefter nasrvserende 
Familie er bemevnt, Pasithoe Goodsir, er vistnok endnu 
kun meget ufuldstsendigt kjendt, men synes mig dog ved 
den fuldstaendige Mangel af Saxlemmer og de vel udvik- 
lede Fplere at maatte stilles nsermest ved Slffigten Colos- 
sendeis, Jarzvnsky, og sammen med denne at danne en 
egen Familie, der aabenbart slutter sig temmelig mer til 
de 2 foregaaende Familier. 
Gen. 14. Colossendeis, Jarzynsky. 1870. 
Slsegtscharaeter. Legemet robust eller smaekkert, 
med forboldsvis korte Sidefortsatser og liden Pandedel, 
uden Hals. Halesegmentot meget smalt og skarpt be- 
grsendset fra Kroppen. 0ieknuden tilspidset, uden tyde- 
lige 0ine. Snabelen af anselig Storrelse, Enden afstumpet, 
3-lappet, ikke afsmalnende. Folerne smaekre, uden tydelige 
Haar. De falske Fodder stserkt forlsengede, 4de og 6te 
Led lsengst, de 4 sidste bevsebnede med Here Rsekker af 
samiuentrykte Tomer, Endekloen tydelig. Gangfodderne 
stserkt forlsengede, de 3 Hofteled korte og at ens Udseende, 
Endepartiet smalt, cyliudriskt, Tarsalleddet lsengere end 
Fodleddet, det sidste simpelt, uden Torner i Inderkanten, 
Endekloen sylformig. uden Bikloer. 
Bemserkninger. Nservserende Slsegt er opstillet af 
den russiske Zoolog Jarzynsky for den af Sabine som 
Phoxichilus proboscideus beskrevne kolossale arktiske Pyc- 
nogonide. Hertil kunde jeg i Aaret 1876 foie en meget 
distinct nv Art fra Nordhavs-Expeditionen, C. angusta, og 
i sit Arbeide over Challenger Expeditionens . Pycnogonideer 
liar Hoek opfort ikke mindre end 9 forskjellige herhen 
horende Arter, hovedsagligt fra det syd-atlantiske Hav, 
hvoraf en, C. gigas, opnaar en end mere kolossal Storrelse 
end dens Slsegtning i Norden. For Tiden kjender man 
saaledes iadt ikke mindre end 11 til denne Slsegt horende 
Arter. Som Slsegtsnavnet antyder, er det isser den enorme 
TTdvikling af Snabelen. der giver disse Dyr sit saeregne 
Prseg. Fra Slsegten Pasithoe er de herhen horende Arter 
desuden let kjendelige ved sine stserkt forlsengede Gang- 
fodder og ved den simple Bygning af disses Endeparti. 
Fam. 7. Pasithoidae. 
Trunk unsegmented, with short frontal part. Proboscis 
uncommonly large, not flexibly connected to the trunk. 
Chelifori quite absent in the fully developed animal. Palpi 
and false legs well developed, both 10-jointed and secured 
close together in below the frontal part. 
Remarks. The genus, from which the present family 
is named, Pasithoe, Goodsir, is certainly, as yet, only very 
imperfectly known, but, still, it appears to me, from the 
perfect absence of chelifori and the well developed palpi, 
that it must be placed next to the genus Colossendeis, 
Jarzynsky, and along with it form a family by itself, which 
evidently approximates very closely to the 2 preceding 
families. 
Gen. 14. Colossendeis, Jarzynsky. 1870. 
Generic Characters. Body robust or slender, with 
relatively short lateral processes and small frontal part, 
no neck. Caudal segment very narrow and sharply defined 
from the trunk. Ocular tubercle pointed, without distinct 
eyes. Proboscis of respectable size, the extremity blunted, 
tri-lobate, not tapered. Palpi slender, without distinct 
setae False legs greatly elongated, the 4th and 6th joints 
longest, the 4 last armed with several series of crowded 
spines, terminal claw distinct. Ambulatory legs greatly 
elongated, the 3 coxal joints short, and similar in appear- 
ance, terminal part narrow, cylindrical, tarsal joint longer 
than the propodal joint, the last-named plain, without 
spines on the inner margin, terminal claw awl-shaped, with- 
out auxiliary claw. 
Remarks. The present genus was established by the 
Russian Zoologist. Jarzynsky. to include the colossal Arctic 
Pycnogonid described by Sabine as Phoxichilus probosci- 
deus. To this form I was able, in 1876, to add a very 
distinct new species C. angusta from the North Atlantic 
Expedition, and Hoek has, in his work upon the Pyc- 
nogonids of the ..Challenger 11 Expedition, described no less 
than 9 different species pertaining to the same genus, princip- 
ally from the South Atlantic Ocean, of which one C. gigas 
attains a still more colossal size than its relative in the 
North. At present, therefore, we are acquainted with not 
less than 11 species pertaining to this genus. As the 
generic designation indicates, it is the enormous develop- 
ment of the proboscis especially, that imparts to those 
animals their special character. The species of this genus 
are, besides, easily distinguished from the genus Pasithoe, 
by their greatly elongated ambulatory legs and by the 
simple structure of the terminal part of the latter. 
Den norske Nordhavsexpedition. G. O. Sars: Pyenogonidea. 
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