33 



der kun rage ubetydeligt frem. ere 3 Slags: aciculøse Bør- 

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

 meget kortere ydre Tand og med Spidsen ligesom (hekket 

 af en Sætte; haarformige, svagt gule Børster med en Lang 

 bredbræmmet S]iiils. der staar lidt skraat mod Stilken, og 

 endelig meget tynde, farveløse Horster, der i Enden ere 

 udbredte til en vifteformig, tint stribet (foldet?) Membran 

 (Fig. 12). At disse Horster ikke ere infundibuliforme. som 

 Malmgren kakler dem. men meiselformige, som de betegnes 

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

 Ilte Kod. der forresten er udstyret som de foran liggende, 

 tindes indenfor Dorsalcirren en kort Brancbie (Tab. IV, 

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

 indtil de ganske forsvinde ved det 21de Led; Branchier 

 tindes mindst til det 8de Led bagfra, kanske endnu læn- 

 gere. Fodknuderne forresten uforandrede, kun aftagende i 

 Størrelse lige til Analleddet. der er forsynet med to meget 

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

 Forende blaagrøn. Iste Led brunt, de følgende Led med 

 en. jo længere bau. 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 Kor ikke altid er dækket med Conchylie- 

 fragmenter, men oftere tindes dækket med Smaasten som 

 hos den her beskrevne Art. Rørene have hos begge Arter 

 deu samme nadtrykt 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. roii'-hylrga 9 Takker, hos denne Art 

 kun s 'i Tab. IV. Fig. 7), og Tændeme ere hos 0. conchy- 

 lega i det hele lysere, kun langs de takkede Render 

 morktfarvede. skjønt der i denne Henseende tindes mange 

 Modifikationer. 



Glycera capitata. Ørst. 



Af Exemplarer indfangede i Saltstrømmen havde et 

 en tvedelt Bagende med Forlængelse af Tarmkanalen ud i 

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



Den nnrske Nordharsexpedition. G. A. Hausen: Annelida. 



prominence at the base of the pedal protuberance (PI, IV. 

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

 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, spreading 

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

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

 termed by Malmgren, mfundibuliform, but. 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 (PI. IV. fig. 13). Posteriorly, the dorsal 

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

 they disappear altogether. Branchiae occur at least, coun- 

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

 The pedal protuberances, continuing in other respects uni- 

 form, diminish gradually in magnitude out to the anal 

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

 fig. 9). Colour: — The anterior extremity of the head bluish- 

 green ; 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. 



This Onuphis bears most resemblance to 0. conchy- 

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

 with conchilious 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. condiylega 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 teeth in 0. conchylega have 9 jags, in this species 

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

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

 margins, though in this respect numerous modifications are 

 observed. 



Glycera capitata, Ørst. 



Among the 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,. 



