et blodt Parti lulad ov: liaiitil .for Stilken; ilette Parti t^'i' 

 altid imlsuiiket muler det ovrige Niveau. 



Polynoe aspera. n. sj). Stat. 48. 



Læugden ca. 2.5"» Bredden 8 — i)""", med Børster. 

 15 Par Elytrer, der dwkke hele Ryggen. Kroppen iiad- 

 trykt, jævnt afsmaluende bagtil. Hovedlappen omtrent lige 

 lang som bred. udtrukket i to temmelig lauge Spidser; bagre 

 Par Øine helt bag paa Issen, forreste omtrent midt paa 

 Hovedets ydre Rand (T. II, Fig. 11). Palperne tykke, 

 nmde. glatte. Tentakelen og Teutakelcirerrne omtrent 

 jævnlange med dem. tint cilierede ligesom de korte An- 

 tenner, der udspringe under Tentakelens Basis, og Dorsalcir- 

 rerne. der række noget udenfor Børsterne. Skjellene for 

 det blotte Øie glatte ; under Lupen sees fine smaa Punkter • 

 paa Fhiden og en Krands af korte, tyude Cilier langs den 

 bagre og ydre Rand. Ved stærkere Forstørrelse ser man 

 først tydeligt de haarde Papiller, der dække hele Fladen 

 undtagen en Stribe langs den indre fordre Rand ; de ere smaa 

 spidse. koniske Fremragninger, der mod den bagre Rand 

 tor en større Del tiltage i Størrelse, enkelte af dem ganske 

 betydeligt fT. II. Fig. 14 & ln): foruden i Randen (tættest 

 udåd) tindes ogsaa Cilier spredte melleni de haarde Papil- 

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

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

 12). Børsterne ere middels lauge 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: Skjælleue 

 mere jævnt eller ujævnt bruutfarvede paa deres bagre 

 Del; samtlige Hovedets TiUueng bruutfarvede undtagen i 

 Spidsen. der er farvelos. Leddenes 1 )orsaltiader med brune 

 Ba and, stærkest farvede udåd til Siderne. 



Denne Form er af Théel ' fundet i det Kariske 

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



Af Théel er ikke angivet Våndets Temperatur for 

 de forskjellige Stationer; og for Moldøeus Vedkommende 

 er Våndets Temperatur ikke maalt; men da Dyret fandtes 

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

 Havet mellem Bremanger og Vaagsøen. er der neppe Gruutl 

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

 P. aspera er saaledes ogsaa et Exempel jiaa et Dyr, der 

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

 skrabede paa akkurat de samme Lokaliteter ved Moldøen 

 som i 1876, fandt jeg- hverken dette Dyr eller Uere a.nilre. 



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

 and posterior to the pedicle; and this part is invariably 



depressed 

 surface. 



or rather sunk, below the level of the surrounding 



Polynoe aspera, n. sp. Stat. .48. 



The body, depressed and tapering posteriorly, with 

 15 pairs of elytræ covering the whole of the back. Extreme 

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

 the l)ristles. The lobe of the head, about as long as broad, 

 produced anteriorly each way into 2 comparatively long poin- 

 ted extremities. The postei-ior 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 antennæ. springing from beneath the base 

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

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

 scales, or elytræ, smooth; under a lens, their surface is 

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

 delicate' ciha appears encircling the posterior and outer 

 margin. Not till highly magnified do the hard papilla' which 

 cover the' entire surface, .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, tigs. 14, 15). Exclusive of those along the 

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

 between the hard papillæ inwards over the surface, PL II, 

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

 tively acuminate bristle-bearing warts, PI. 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 

 (PL II, fig. 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 ' in the Kai'a 

 Sea, a.nd by myself off Moldoen. noi-tli of Kloro. 



Théel does not state the temperature of the water at the 

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

 not taken; but the animal having been cai)tured at a 

 depth of 100 — 150 fathoms, in a fjord disemboguing into 

 the sea between Bremanger and Vaagso. the temperature 

 can hardly have been lower than 0". 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 1876. I 

 met with neither this Annelid nor several other aui- 



H.i. Théel. I. c. Pas-, m. 



' Hj. Théel, 



III. 



