138 



42. Colossendeis proboscidea (Sab.) 

 (Pl. XV, Fig. \, a— d). 



Fhoxichilus proboscideus, Sabine, Suppl. to the Append. of 



Capt. Parry's Voyage, p. CCXXVI. 

 Colossendeis borealis, Jarzynsky, Præm. Cat. Pycnogon., 



Ann. de la Société des Naturalistes de St. Petersbourg. 



ssendeis proboscidea, G. O. Sårs. Prodrom. descript. 



Crust. et Pycnog., etc. p. 368. 

 Anomorhytichus Smithii, Miers, Ann. Mag. Nat. Hist. 1881, 



p. 50, Pl. VII, Fig. 6-8. 

 Colossendeis proboscidea, Hoek, Pycnog. Wil Brarents, 1. c. 



p. 2-2, Pl. II, Fig. 41 — 42. 

 < 'oloséendeis gigantea, Struxberg, Vega-Expeditionens vetensk. 



iakttagelser, Bd. I, p. 708. 

 Colossendeis proboscidea, Hansen, Karahavets Pycnogonider, 



p. 20. 



G. 0. Sårs, Pycnogouidea borealia 



& arctica, No. 42. 



Artscliaracter. Kroppen kort og undersætsig, aflang 

 oval, bredest paa Midten, med tæt sammentrængte Side- 

 fortsatser. Pandedelen triangulær, neppe bredere end 

 Kruppen paa Midten. Halesegraentet meget smalt, cylin- 

 driskt. nedadkrummet. Snabelen af enorm Størrelse, mere 

 end dobbelt saa lang og i sit ydre Parti næsten dobbelt 

 saa tyk som Kroppen, noget buet og successivt udvidet 

 mod Enden, næsten kolleformig. Øieknuden lige opad- 

 rettet, konisk tilspidset. Følernes 3 ydre Led successivt 

 aftagende i Størrelse og tilsammen længere end 7de Led. 

 De falske Fodder, lige udstrakte, længere end Legemet, 

 4de Led kortere end 6te. Gangfødderne forholdsvis robuste, 

 omtrent dobbelt saa lange som Legemet, Tarsalleddet 

 betydelig længere og tykkere end Fodleddet, Endekloen 

 kortere end dette sidste Led. Farven gulrød. Legemets 

 Lrengde 50""". Spandvidde 225""". 



Bemærkninger. Denne gigantiske Form. der danner 

 Typen for 'Slægten, skiller sig fra alle de øvrige bekjendte 

 Arter ved den ualmindelig korte og sammentrængte Krops- 

 form og ved Snabelens excessive Størrelse og eiendommelige 

 kølledannede Form. Ogsaa hvad Fødderne angaar har den 

 et ubetinget mere robust Præg end de øvrige Arter. 



Beskrivelse. Det foreliggende Exemplar. der synes 

 at være en fuldt udviklet Hun, har en Længde fra Spidsen 

 af Snabelen til Enden af Halesegmentet af fulde 50""", og 

 en Spandvidde melle in de udstrakte Gangfødder af ikke 

 mindre end 225""". Den er saaledes ubetinget den største 

 af alle vore nordiske Pycnogonideer. 



Formen maa (se Pl. XV, Fig. 1) idetheletaget siges 

 at være temmelig robust, navnlig hvad selve Kroppen an- 

 gaar, Denne sidste er (se ogsaa Fig.' 1 a, 1 b) af aflang 

 Form, med jevnt convex Bygside og noget affladet Bug- 

 side, samt uden det mindste Spor af nogen Segmentation. 

 Sidefortsatserne, der er kortere end Kroppens Brede paa 

 Midten, er saa tæt sammentrængte, at der knapt er nogen 

 bemærkelige Mellemrum mellem dem. og den centrale Del 



42. Colossendeis proboscidea (Sab.) 



(Pl. XV, fig. 1, a— cl). 



Fkoxichilus proboscideus, Sabine, Suppl. to the Append. of 



Capt. Parry's Voyage, p. CCXXVI. 

 Colossendeis borealis, Jarzynsky, Præm. Cat. Pycnogon. 



Ann. de la Société des Naturalistes de St. Petersbourg. 

 Colossendeis proboscidea, G. 0. Sårs, Prodrom. descript. 



Crust. et Pycnogon. &c. p. 368. 

 Anomorhynchus Smithii, Miers, Ann. Mag. Nat. Hist. 1881. 



p. 50., Pl. VII, figs. 6—8. 

 Colossendeis proboscidea, Hoek, Pycnog. Wil. Brarents, 1. c. 



p. 22, Pl. II, figs. 41—42. 

 Colossendeis gigantea, Stuxberg, Vega-Expeditionens Vetensk. 



iakttagelser. Bd. I, p. 708. 

 Colossendeis proboscidea, Hansen, Karahavets Pycnogonider, 



p. 20. 

 — G. 0. Sårs, Pycnogonidea borealia 



& arctica, No. 42. 



Specific Characters. Trunk short and stout, oblongo- 

 oval, broadest at the middle, with closely crowded lateral 

 processes. Frontal part triangular, scarcely broader than 

 the trunk at the middle. Caudal segment very narrow 

 cylindrical, bent downwards. Proboscis of enormous size, 

 more than twice as long and in its outer part almost 

 twice as thick as the trunk, somewhat arcuate, gradually 

 expanded towards the extremity, almost claviform. Ocular 

 tubercle directed straight upwards, conically pointed. The 

 3 outer Jjoints of the palpi diminishing successively in 

 size, and together longer than the 7th joint. False legs, 

 straightly extended, longer than the body, 4th joint shorter 

 than the 6th one. Ambulatory legs relatively robust, about 

 twice as long as the body, tarsal joint considerably longer 

 and thicker than the propodal joint, terminal claw shorter 

 than that last-named joint. Colour yellow-red. Length of 

 the body 50""". Extent 225""". 



Remarks. This gigantic form, which forms the type 

 of the genus, distinguishes itself from all the other known 

 species, by its uncommonly short and compact trunk, and 

 by the excessive size of the proboscis and its peculiar 

 clavate form. Also in respect of the legs it has a dis- 

 tinctly more robust character than the other species. 



Deseription. The specimen before us, which appears 

 to be a fully developed female, has a length from the 

 point of the proboscis to the extremity of the caudal seg- 

 ment, of quite 50""" and an extent between the extended 

 ambulatory legs, of not less than 225""". It is, thus. 

 indubitably the largest of all our northern Pycnogonids. 



The form (see Pl. XV, fig. 1) must be said to be, 

 on the whole, pretty robust, especially as regards the 

 trunk. This last is (see also figs. 1 a, 1 b) oblongo-oval 

 in form, with an even convex dorsal side and somewhat 

 flattened ventral side, and without the least trace of seg- 

 mentation. The lateral processes, which are shorter than 

 the breadth of the trunk at the middle, are so closely 

 crowded, that there is scarcely any noticeable interval 



