119 



til 649 F. Navnlig forekom den i ganske enorme Mas- 

 ser paa Stat. 18. Alle Stationer, alene med Undta- 

 gelse af Stat. 363, tilhører den kolde Area. Ogsaa fra 

 det kariske Hav har jeg havt ikke faa Exemplarer til 

 Undersøgelse, indsamlede under Nordenskjolds Expeditioner, 

 og som sædvanlig her paa betydelig grundere Vand end i 

 Nordhavet. 



Udbredning. Arten synes at have en vid Udbred- 

 ning i de arktiske Have. De af Bell undersøgte Exem- 

 plarer var fra arktisk Nordamerika, Wellington-Canalen, og 

 af Miers angives den ogsaa fra Discovery-Bugten. Af 

 Heller anfores den fra Frants Joseph Land og af Hoek 

 fra forskjellige Stationer i Barents Søen. Under „Light- 

 ening : ' Expeditionen toges den i Færø-Shetlands-Renden 

 (Wyville Thompson), og under „Knight Errant"-Expedi- 

 tionen erholdtes denne Art ifølge Hoek saa langt Syd som 

 60° N. B., men paa meget dybt Vand. Endelig anføres 

 den af Hansen fra det kariske Hav. At Arten er en ægte 

 arktisk Form, synes ifølge dens Forekomst utvivlsomt. 



Fam. 5. Ammotheidæ. 



Legemet sammentrængt, mere eller mindre ufuldkom- 

 ment segmenteret. Saxlemmerne smaa og rudimentære, i 

 fuldt udviklet Tilstand uden Chela. Følerne vel udviklede, 

 4— 9-leddede. Falske Fodder tilstede hos begge Kjøn, 

 7 — 10-leddede, uden Endeklo. Gangfødderne med Bikløer. 

 Snabelen tenformig, mere eller mindre bevægeligt forbunden 

 med Huvedsegmentet. 



Bemærkninger. Denne Familie indeholder en Del, 

 fordetmeste meget smaa og undersætsigt byggede Pycnog- 

 onider. der især udmærker sig fra de i det foregaaende 

 omtalte Fonner ved den rudimentære Beskaffenhed af 

 Saxlemmerne og ved Snabelens Bygning, i hvilke Henseen- 

 der de viser mere Lighed med de til følgende Familie, 

 Eurycydidæ, henførte Former. , Familien synes at inde- 

 holde talrige Slægter, hvoraf dog flere er meget ufuldstæn- 

 digt characteriserede. Som utvivlsomt henhørende til nær- 

 værende Familie maa jeg betragte følgende Slægter: Am- 

 mothea, Leach; Tanystylum, Miers; Pariboea, Philippi; 

 Oiceobates, Hesse; Oorhynchus, Hoek; Clothenia, Dohrn og 

 Trygæus, Dohrn. Ogsaa om adskillige andre opførte Slægter 

 kan det med nogenlunde Sikkerhed siges, at de tilhører 

 nærværende Familie; men hvorvidt de i Virkeligheden er 

 distincte, eller om de falder sammen med nogen af de 

 ovenanførte Slægter, lader sig paa Grand af den ufuld- 

 stændige Beskrivelse vanskeligt afgjøre. Saadanne Slægter 

 er: Bohmia, Hoek; Phanodesmus, Costa; Pephredo, Goodsir; 

 Platycelus, Costa; Lecythorhynchus . Bohra. Hos os er 

 Familien kun repræsenteret af en enkelt Slægt. 



of Spitzbergen; depth from 260 to 649 fathoms. Espec- 

 ially did it present itself in quite enormous quantities at 

 Station 1<S. All the Stations, with exception of Stat. 363 

 alone. pertain to the cold area. From the Kara Sea. also, 

 I have bad not a few specimens for investigation. collected 

 during Nordenskj5ld's Expeditions. and. as usual here, in 

 much shallower depths than in the North Atlantic Ocean. 

 Distribution. The speeies appears to have an ex- 

 tensive distribution in the Acrtic seas. The specimens 

 investigateil by Bell were from Arctic North America, 

 Wellington Channel; and it is also remarked by Miers 

 from Discovery Bay. Heller has remarked it from Frants 

 Joseph's Land. and Hoek from several stations in Barents 

 Sea. On the „Lightning" Expedition it was tåken in the 

 Faroe-Shetland channel (Wyville Thompson), and on the 

 „Knight Errant" Expedition it was obtained, according 

 to Hoek, as far south as 60° N. lat. but at a very great 

 depth. Finally, it is remarked by Hansen from the Kara 

 Sea. That the speeies is a genuine Arctic form seems 

 from its occurrence to be indubitable. 



Fam. 5. Ammotheidæ. 



The body compact. more or less imperfectly seg- 

 mented. Chelifori small and rudimentary. in the fully devel- 

 oped state no chela. Palpi well-developed, 4 — 9-jointed. 

 False legs present in both sexes, 7 — 10-jointed, without 

 terminal claw. Ainbulatory legs with auxiliary clåws. 

 Proboscis fusiform, more or less movably connected to the 

 cephalic segment. 



Bemarks. This family includes a number of. chietly 

 very small and stoutlv built Pyenogonids, which especially 

 distinguish themselves from the previously mentioned fonns 

 by the rudimentary nature of the chelifori and the struc- 

 ture of the proboscis, in which respects thev display a 

 greater resemblance to the forms referred to the following 

 family Eurycydidæ. The family appears to include numer- 

 ous genera, of which, however, several are very imperfectly 

 characterized. I must regard the following genera as in- 

 dubitably pertaining to the present family: Ammothea. 

 Leach; Tanystylum, Miers; Pariboea. Philippi; Oiceobates, 

 Hesse; Oorhynchm, Hoek; Clothenia, Dohrn and Tryyu-iin. 

 Dohrn. Also in regard to several other genera which 

 have been established, it may with some degree of certainty 

 be said. that thev pertain to the present family; but 

 whether thev really are distinct, or coincide with any of 

 the above-named genera is difficult to determine owing 

 to the imperfect descriptions supplied. Such genera are: 

 Bohmia. Hoek; Phanodesmus, Costa; Pephredo, Goodsir: 

 Platycelus, Costa; Lecythorhynchus, Bohm. In the northern 

 seas the family is only represented by a single genus. 



