141 
Colossendeis angusta, G. 0. Sars, Pycnogonidea borealia & 
arctica, No. 43. 
Artscharacter. Legemet nieget smalt, linemrt, med 
forholdsvis korte og viflt adskilte Sidefortsatser; Pande- 
delen noget udvidet, triangular. Halesegmentet smalt 
cylindriskt, */ 3 saa langt som Kroppen. Snabelen lige for- 
tilrettet, neppe bredere, men noget laengere end Kroppen, 
cylindrisk, lidt fortykket paa Midten. Gieknuden stserkt 
ophoiet, dannende et koniskt tilspidset, noget foroverboiet 
Fremspring. Fplerne staerkt forlrengede, 3die Led storst, 
8de Led smrdeles kort, skjrnvt afskaaret i Enden, de 2 
ydre Led omtrent af ens Laengde. De falske Fodder, lige 
udstrakte, 1 / 2 Gang lmngere end Legemet, 4de og Gte Led 
af ens Lscngde. Gangfodderne sserdeles spinkle og torken- 
gede, nmsten 3 Gauge lamgerc end Legemet, det indbyrdes 
Forhold af Leddene omtrent som bos foregaaende Art; 
dog Forskjellen mellem Tarsal- og Fodleddet mindre, og 
Endekloen betydelig lmngere. Farven tagstensrpd. Lege- 
mets Lsengde 19'""’; Spandvidde 123”"". 
Bemserkninger. Nservserende Art er let kjendelig 
fra foregaaende ved den langt smsekrere Kropsform, den 
smale cylindriske Snabel og de vidt adskilte Sidefortsatser. 
Derimod kommer den saa smrdeles nser en af Hoek Ira 
Challenger-Expeditionen beskreven Form, C. gracilis, at jeg 
vilde have vseret tilboielig til at identificere begge med 
hinanden, bvis ikke denne sidste Forms Forekomst (i det 
antarktiske Hav) ganske synes at maatte forbyde en saa- 
dan Identification. 
Beskrivelse. De under Expeditionen tagne Exem- 
plarer har alle omtrent en Laengde af 19’””* og en Spand- 
vidde af 123 mm . Denne Form opnaar saaledes en ret 
anselig Storrelse, skjondt den i saa Henseende staar langt 
tilbage for foregaaende Art. 
Legemets Form er (se PI. XV, Fig. 2), i Modsait- 
ning til bvad Tilfmldet er hos foregaaende Art, sserdeles 
spinkel, baade bvad selve Kroppen og Lemmerne angaar. 
Da Integumenterne er af betydelig Fastbed, faar det hele 
Legeme ved Siden af sin spinkle Form ogsaa en eiendom- 
melig Stivbed i alle Dele. 
Selve Kroppen (Fig. 2 a, 2 b, 2 c) er at sinal cylin- 
drisk Form, fuldkommen lige, og, som bos foregaaende 
Art, uden ethvert Spor af Segmentering. Sidefortsatserne 
er forholdsvis koi’te, neppe kengere end Kroppen er bred, 
men — ligeledes ganske i Modssetning til hvad liltmldet 
er hos C. proboscidea — skilte ved meget brede Mellem- 
rum. Pandedelen er ganske kort, af triangulser Form og 
noget bredere end den ovrige Krop, uden imidlertid at 
vmre skilt fra samme ved nogen egentlig Hals. Haleseg- 
mentet, der som hos foregaaende Art er skarpt afsat fra 
Kroppen, er sserdeles smalt, horizontalt bagudrettet og 
af cylindrisk Form, eller ganske lidt fortykket i sit ydre 
Parti. 
Kroppens Overbade er ganske glat, uden Spor at 
Haar eller Torner. Under Mikroskopet viser de keder- 
Colossendeis angusta, G. 0. Sars, Pycnogonidea borealia & 
arctica, No. 43. 
Specific Characters. Body very narrow, linear, with 
relatively short and widely separated lateral processes , 
frontal part somewhat expanded, triangular. Caudal seg- 
ment narrow, cylindrical, l /s of the length ol the trunk. 
Proboscis directed straight forward, scarcely broader, but 
somewhat longer than the trunk, cylindrical, slightly tume- 
fieated at the middle. Ocular tubercle strongly protuberant, 
forming a conical acute prominence bent somewhat forward. 
Palpi greatly elongated, the 3rd joint largest, the 8th joint 
particularly short, obliquely truncated at the extremity, 
the 2 outer joints about equal in length. False legs, 
straightly extended, 1 /. 2 longer than the body, the 4th and 
‘6th joints equal in length. Ambulatory legs particularly 
slender and elongated, almost 3 times longer than the body, 
the mutual relations of the joints about the same as in the 
preceding species; but the difference between the tarsal and 
propodal joints is less and the terminal claw is consider- 
ably longer. Colour brick-red. Length of the body 19*™. 
Extent 123”"". 
Remarks. The present species is easily distinguished 
from the preceding one, by its far more slender shape 
of body, the narrow cylindrical proboscis and the widely 
separated lateral processes. On the other hand, it ap- 
proximates so very closely to i . gracilis , a form descubed 
by Hoek from the Challenger Expedition, that I would 
have been disposed to identify them with each other if 
the occurrence of the last-named form (in the Antai ctic 
Ocean) did not appear to forbid such an identification. 
Description. The specimens obtained dining the 
Expedition have all a length of about 1 9 and an extent 
of 123 m “. This form attains, thus, quite a respectable size, 
although, in this respect, it falls far behind the preceding 
species. 
The shape of the body (see PI. XV, fig. 2) is, in 
opposition to what is the case in the preceding species, 
particularly slender, both as regards the trunk and the # 
limbs. As the integuments have a considerable consistency 
the entire body obtains, in addition to its slender form, 
also, a peculiar rigidity in all its parts. 
The trunk itself (fig. 2 a, 2 b, 2 c) is narrow, cyl- 
indric in form, perfectly straight and, as in the preceding 
species, is without the slightest trace of segmentation. The 
lateral processes are relatively short, scarcely longer than 
the trunk is broad, but - also quite in opposition to what 
is the case in G. proboscidea — separated by very broad 
interspaces. The frontal part is quite short, triangular in 
form, and somewhat broader than the rest of the trunk, 
without, however, being separated from it by any real 
neck. The caudal segment which, as in the preceding 
species, is sharply defined from the trunk, is particularly 
narrow, horizontally directed backwards and cyliudric in 
form, or quite slightly tumeficated in its outer portion. 
The surface of the trunk is quite smooth, without 
trace of setae or aculei. Under the microscope the coriace- 
