et blødt Parti udåd og bagtil for Stilken: dette Parti er 

 altid indsunket ander det øvrige Niveau. 



Polynoe aspera. n. sp. Stat. 48. 



LængdeD ca. 2.5°" Bredden 8— i*'"'", med Horster. 

 15 Par Elytrer, der dække hele Ryggen. Kroppen flad- 

 trykt. jævnt afsmalnende bagtil. Eovedlappen omtrenl lige 

 lang som bred, adtrukket i to temmelig lange Spidser; bagre 

 Par Øine belt bag paa Issen, forreste omtrent midl paa 

 Bovedets ydre Rand (T. 11. Fig. 11). Palperne tykke, 

 runde, glatte. Tentakelen og Tentakelcirerrne omtrent 

 jævnlange med dem. tint cilierede ligesom de korte An- 

 tenner, der udspringe under Tentakelens Basis, ogDorsalcir- 

 rerne. der række noget udenfor Børsterne. Skjellene fol- 

 det blotte Øie glatte; under Lupen sees fine smaa Punkter 

 paa Fladen og en Krands a t' korte, tynde Cilier lan.es den 

 bagre og ydre Rand. Ved stærkere Forstørrelse ser man 

 først tydeligt de haarde Papiller, der dække hele Fladen 

 undtagen enStribe langs den indre fordre Band; de ere smaa 

 spidse, koniske Fremragninger, der mod den bagre Rand 

 for en større Del tiltage i Størrelse, enkelte al' dem ganske 

 betydeligt iT. II. Fig. 14 å 15); foruden i Randen (tættest 

 udåd) tindes ogsaa Oilier spredte mellem de haarde Papil- 

 ler indover Fladen (T. 11. Fig. 15) Fodknuderne ere delte 

 i to temmelig spidst uddragne Børsteknuder (T. II, Fig. 

 12). Børsterne ere middels lange og smækre, de dorsale 

 noget kortere og tykkere end de ventrale, begge Sorter 

 som vanligt tværtandede, de ventrale dels med hel. dels 

 med svagt todelt Spids (T. II. Fig. 13). Farven: Skjællene 

 niere jævnt eller ujævnt bruntfarvede paa deres bagre 

 Del; samtlige Hovedets Tilhæng bruntfarvede undtagen i 

 Spidsen, der er farveløs. Leddenes Dorsalfladef med brune 

 Baand. stærkest farvede udåd til Siderne. 



Denne Form er af Théel ' fundet i det Ka riske 

 Mi. og af mig selv i 1876 ved Moldøen nordenfor Florø. 



Af Théel er ikke angi vet Våndets Temperatur fol- 

 de forskjellige Stationer: og for Moldøens Vedkommende 

 er Våndets Temperatur ikke maalt; men da Dyret fandtes 

 paa 100 — 150 Favnes Dyb i en Fjord, der løber ud i 

 Havet mellem Bremanger og Vaagsøen, er der ueppe Grand 

 til at antage, at Temperaturen her har været under 0° 

 P. aspera er saaledes ogsaa et Exempel paa et Dyr. der 

 lever baade i den varme og kolde Area. Da jeg i 1878 

 skrallede paa akkurat de samme Lokaliteter ved Moldøen 

 som i 1 -S 7 « > . landt jeg hverken dette Dyr eller Heri' andre. 



each of these organs has a soft section, extending out from 



and posterior to the pedicle; and this part is invariably 



depressed, or rather sunk, below the level of the surrounding 

 surface. 



Polynoe aspera, n. sp. Stat. 48. 



The body, depressed and tapering posteriorly, with 



15 pairs of elytra' covering the whole of the hack. Extreme 



length about 2.5™, breadth from 8 to '.»""". including 



the bristles. The lobe of the head, about as long as broad, 

 produced anteriorly each way into ^comparatively Long poin- 

 ted extremities. The posterior pair of eyes far behind on the 

 crown, the anterior as near as may be in the middle of 

 the outer margin of the head (PL II. tig. 11). The palps 

 thick, round, and smooth; the tentacle and the tentacular 

 cirri, about equalling them in length, are finely ciliated, as 

 also the short antenna', springing from beneath the base 

 of the tentacle, and the dorsal' cirri, protending a little 

 beyond the points of the bristles. To the naked eye, 

 scales, or elytra-, smooth: under a lens, their surface is 

 found to lie dotted with minute points, and a cincture of short. 

 delicate cilia appears encircling the posterior and outer 

 margin. Kot till highly magnified do the hard papillae which 

 cover the entire sm-face. saving a strip along the inner 

 margin, become distinctly obvious; they consist of minute 

 acuminate protuberances, increasing in magnitude to- 

 wards the posterior margin, many of them considerably 

 (PI. II. figs. 14. 15). Exclusive of those along the 

 margin (densest outwards), are seen other cilia, dispersed 

 between the hard papillae inwards over the surface, PI. II, 

 fig. 15. The pedal protuberances occur as two compara- 

 tively acuminate bristle-bearing warts. PL II. tig 12. The 

 bristles of moderate length, and slender, the dorsal ones 

 somewhat shorter and thicker than the ventral ; both, how- 

 ever, transversely denticulated, and the ventral termina- 

 ting in a point, sometimes simple, sometimes slightly cleft 

 (PI. EI, tig. 13). The colour of the scales on their posterior 

 portion a more or less uniform brown; the appendages 

 of the. head all brown, except at the points, which are co- 

 lourless. The dorsal surface of the segments marked with 

 brown bands, deepest in colour towards the sides. 



This form has been found by Théel x in the Kara 

 Sea. and by myself off Moldøen, north of Florø. 



Théel does not state the temperature of the water at the 

 different observing-stations; as regards Moldø indeed, it was 

 not taken: hut the animal having been captured at a 

 depth of Bin — L50 fathoms, in a fjord disemboguing into 

 the sea between Bremanger and Yaagso. the temperature 

 can hardly have been lower than U". Hence P. aspera 

 furnishes an instance of an animal inhabiting both areas, 

 the warm and the cold. When dredging off Moldøen 

 in 1878. in precisely the same localities as • in 187G, I 

 met with neither this Annelid nor several other ani- 



Hj. Théel, I. e. 1 'ag. 10. 



Hj. Théel, I. c, p. 1". 



