L' 7 



Polynoe arctica. a. sp. 

 stat. 223, 224, i?:;t. 



Kroppen temmelig lived. 36 Led. 1T> Par Eh trer. 

 der dække hele Ryggen. Hovedlappen (Tab. III. Fig. 1) 

 Doget længere end bred, udtrukket i to afstumpede Spidser. 

 Tentakelbasis meget tyk; Tentakelen selv tynd, omtrent 3 

 Gange saa lang som Hovedet. Pålperne af samme Længde, 

 middels tykke, besatte med 6 Kader smaa Papiller. An- 

 tennerne omtrent halvt saa lange som Tentakelen. Tenta- 

 kelcirrerne at' samme Længde som Pålperne. Disse ligesom 

 Tentakelen og Antennerne med en liden spindeltbrmig Op- 

 drivning nedenfor Spidsen og med en brun Ring omkring 

 samme, besatte med meget korte og ikke meget talrige 

 Oilier. Dorsalcirreme af samme Form. men med ulige tal- 

 rikere og bængere Oilier, række kun ubetydeligt udenfor 

 Enden at' Børsterne. Skællene (Tab. III. Fig. 2) langs 

 ydre Rand tæt cilierede; Oilier tindes ogsaa spredte langs 

 bagre Rand og over den ydre Del af Fladen. Skællene 

 forresten besatte meil talrige. tætstaaende. smaa. runde og 

 koniske, haarde Kunder over hele Fladen undtagen langs 

 indre fordre Rand. Knuderne ere farveløse eller gult far- 

 vede, mod den bagre og ydre Rand blive de mere spar- 

 somme, men storre og mestendels brunt til sortfarvede. og 

 ved den bagre Rand rindes desuden 3 — -1 store, koniske, 

 haarde Knuder. og langs den ydre cilierede Rand nogle 

 storre lysgule Knuder. Disse storre Knuder have dels en 

 glat, afrundet Spids, dels er denne spaltet i talrige mindre 

 Knuder. 



Fodkimderne (Tab. III. Fig. 3) ere delte i to tem- 

 melig jævnstore og spidse Børsteknuder: Yentralcirren ræk- 

 ker hen til Spidsen af Fodknuden : de dorsale Børster 

 noget kortere og tykkere end de ventrale (Tab. III. Fig. 

 3). begge tværtandede. de ventrale med enkel Spids (Tab. 

 III. Fig. 4 og 5). 



Polynoe assimilis, n. sp. 



Stat. 363. 



Kroppen fladtrykt. 34 Led. 15 Par Elytrer. Hoved- 

 lappen fortil stærkt indskaareil. noget længere end bred 

 (Tab. I. Fig. 22). Tentakelbasis temmelig tyk. Tentakelen 

 selv tynd. omtrent 2 Gange saa lang som Hovedet; Pål- 

 perne runde, glatte, lidt længere end Tentakelen. Tentakel- 

 cirrerne af Længde som Tentakelen. Antennerne halvt saa 

 lange som denne. De tyude Tilhæng tæt cilierede. Ely- 

 trerne af vanlig Form. overalt besatte med smaa haarde 



Polynoe arctica, n. sp. 



Stats. 223. 224. 237. 



The body comparatively broad; 36 segments. 15 pairs 

 of elytra' covering the whole of the back. The lube of 

 the head (PI. 111. tig. 1). somewhat longer than broad, 

 produced in two obtuse points. Base of tentacle ex- 

 ceedingly thick, the tentacle itself slender, about 3 times as 

 lung as the head. The palps of the same length, mode- 

 rately thick, and furnished with (i rows of minute papillæ. 

 The antenna' about half as long as the tentacle. The ten- 

 tacular cirri equal in length to the palps. The latter, as 

 also the tentacle and the antennae, which are furnished 

 with exceedingly short and not very numerous cilia, have a 

 small fusiform process, encircled by a brown ring projec- 

 ting from below the point. The dorsal cirri, similar in 

 form, but with longer and far greater numbers of cilia, 

 project but very little beyond the extremities of the bris- 

 tles. The scales (PI. III. tig. 2) densely ciliated along the 

 outer margin: cilia occur, too. sparingly dispersed, along 

 the posterior margin, and over the outer portion of the 

 surface. The scales covered, besides, over the whole sur- 

 face, except along the inner anterior margin, with numbers 

 of small, hard, closely set. round and conic, nodules. These 

 nodules are either colourless or yellow, towards the outer 

 posterior margin more sparingly distributed, but larger, 

 and mostly brown or black; on the posterior margin occur, 

 too. 3 or 4 large, conic, hard nodules, and along the outer 

 ciliated margin a few more, light-yellow in colour and com- 

 paratively large. The latter have either a smooth, rounded 

 or a cleft, bipartite point. Many smaller nodules. 



The pedal protuberances (PI. Ill, tig. 3) are divided 

 into two acuminate bristle-bearing nodules: the ventral 

 cirrus reaches to the summit of the ventral protuberances; 

 the dorsal bristles somewhat shorter and thicker than the 

 ventral (PI. III. tig. 3); both transversely serrate, the ven- 

 tral with simple points (PI. Ill, figs. 4. 5). 



Polynoe assimilis, n. sp. 



Stat. 363. 



Body depressed; 34 segments. 15 pairs of elytræ. 

 The lobe of the head somewhat longer than broad; ante- 

 riorly, very emarginate (PL I. tig. 22). Base of tentacle 

 comparatively thick; the tentacle itself slender, about 

 twice the length of the head : the palps round, smooth, a 

 trifle longer than the tentacle. The tentacular cirri of the 

 same length as the tentacle: the antennæ 'half as long. The 

 slender appendages densely ciliated. The elytræ of the usual 



. 4* 



