33 



der kuu rai^e ubetvdeligt frem. ere 3 Sla.us: aciculose Hor- 

 ster af samme Form som i to forreste Led. men med en 

 meget kortere ydre Tand og med Sjiidsen ligesom dækket 

 af en Ha-tte; haarformige. svagt gule Børster med en lang 

 bredbræmmet 8pids. der staar lidt skraat mod Stilken, og 

 endelig meget tynde. farveløse Børster, der i Enden ere 

 iidliredte til en vifteformig. fiut stribet ffoldetV) Membran 

 (Fig. 12). At disse Boi-ster ikke ere infundibulifurme. som 

 Malragren kakler dem. men meiselformige. som de betegnes 

 af Ehlers. sees let. naar man faar dem halvt i Profil. Paa 

 1 1te Fod. der forresten er udstyret som de foran liggende, 

 findes indenfor Dorsalcirren en kort Branchie (Tab. IV, 

 Fig. 13). Dorsalcirrerne blive bagover mindre og mindre, 

 indtil de ganske forsvinde ved det 21de Led; Branchier 

 findes mindst til det 8de Led bagfra. kanske endmi læn- 

 gere. Podknuderne forresten uforandrede, kun aftagende i 

 Størrelse lige til Analleddet. der er forsynet med to meget 

 lange Aualcirrer (Tab. IV, Fig. 9). Farven: Hovedets 

 Forende blaagi-øn. Iste Led brunt, de følgende Led med 

 en. jo længere bag, desto smalere brun Bræm langs fordre 

 Rand: de bagerste Led farveløse: her skinner Tarmen 

 igjennem. 



Denne Onuphis har mest Lighed med 0. conchylega. 

 M. Sårs. hvis Rør ikke altid er dækket med Couchylie- 

 fragmeiiter. men oftere findes dækket med Smaasten som 

 hos den her beskrevne Art. Rørene have hos begge Arter 

 den samme fladtrykt firkantede Form. 0. conchylega har 

 derimod i 2det Par Fodknuder 3 Slags Børster, denne Art 

 kun aciculøse. Kjæverne ere ens af Bygning, men Tæn- 

 derne have hos 0. conchylega 9 Takker, hos denne Art 

 kun 8 (Tab. IV. Fig. 7). og Tænderue ere hos 0. conchy- 

 lega i det hele lysere, kun langs de takkede Render 

 mørktfarvede. skjønt der i denne Henseende findes mange 

 Modifikationer. 



Glycera capitata, Ørst. 



Af Exemplarer iudfangede i Saltstrømmeu havde et 

 en tvedelt Sagende med Forlængelse af Tarmkanalen ud i 

 begge Grene (Tab. V. Fig. 27). 



Den norske Nordiiavsexpedition. G. A. Hsinsen : Aunclula. 



prominence at the base of the jiedal protuberance (Pl. IV. 

 fig. 12). At the summit are seen two cirrhiferous apjien- 

 dages. the lower longer than the upper, and longest on 

 the 3rd segment. The bristles — but slightly projecting — 

 are of three kinds, viz.: — 1) acicular bristles, similar to 

 those on the two anterior segments but with a much shorter 

 outer tooth, and having the point, as it were, covered with 

 a mantlet; 2) capilliform. pale yellow bristles, with an elon- 

 gate, broad-bordered point, inclining towards the pedicle; 

 and 3) exceedingly delicate, colourless bristles, sjn-eading 

 out at the extremity into a finely striate (folded?) flabelli- 

 form membrane (fig. 12). That these bristles are not. as 

 termed by Malmgren. infundibuliforni. liut. as Ehlers calls 

 them, chisel-shaped, is seen at a glance when regarding 

 them obliquely. The 11th foot, in other respects precisely 

 similar to those preceding it. bears, inside the dorsal cirrus, 

 a short branchia (PL IV. fig. 13). Posteriorly., the dorsal 

 cirri become smaller and smaller, till, at the 21st segment. 

 they disappear altogether. Branchiæ occur at least, coun- 

 ting backwards, to the 8th segment, possibly still faither. 

 The pedal protuberances, continuing in other respects uni- 

 form, diminish gradually in magnitude out to the anal 

 orifice, which has two exceedingly long anal ciiTi (PI. IV. 

 fig. 9). Colour: — Tlie anterior extremity of the liead bluish- 

 gi'eeu ; 1st segment brown ; the following segments distinguished 

 by a brown edge along the anterior margin, becoming 

 narrower at each successive segment; the posterior seg- 

 ments colourless. Here the intestine shines through the 

 skin. 



Tins Onuphis bears most resemblance to 0. conchy- 

 lega, M. Sars. in which the tube is not always covered 

 with concliiiious fragments, but frequently with minute 

 pebbles, as is the case with the species here described. In 

 both species the tubes have the same depressed, quadrang- 

 ular form. 0. conchylega is. on the other hand, distinguished 

 by three kinds of bristles on the 2nd pair of pedal protu- 

 berances; this species has only one — the acicular. 

 The maxillæ are in both species similar as to structure; 

 but the teetli in 0. conchylega have 9 jags, in this species 

 only 8 (PI. IV. fig. 7); moreover", the teeth in 0. conchy- 

 lega are lighter in colour, being dark only along the jagged 

 margins, though iu this respect numerous modifications are 

 observed. 



Glycera capitata. Ørst. 



Among tiie specimens of this form brought up at 

 Saltstrømmen, one had the posterior extremity bipartite, 

 with the intestinal canal produced into both branches. 

 (PI. V. fig. 27). 



