9 r» 



Fig. 16). Palperue. med 6 Papillerader, omtrent 4 Gauge 

 længere end Hovedet; Tentakelbasis tyk. Tentakelen selv 

 tynd, ikke fuldt saa lang som Palperne: Tentakelcirreme 

 af Tentakelens Længde; Anteiinerne af Hovedets Længde. 

 Disse tynde Hovedtilhæng have en spindelformig Opdrivning 

 nedenfor den tynde Spids og ere glatte, medens Dorsal- 

 cirrerne. der rage noget udenfor Børsterne og have Form 

 som Hovedtilhængene,. ere tæt cilierede. Skællene ere 

 samtlige, ogsaa første Par. aflangt nyreformige, besatte ved 

 den bagre Rand med 2 eller 3 store koniske mørke Papil- 

 ler og langs ydre Rand med 5 — 8 lysegule (Tab. I. Fig. 17). 

 Under Lupen opdager man sinaa haarde Knuder over hele 

 Fladen af Skællet undtagen langs indre fordre Rand. Disse 

 smaa Knuder ere kalvkugleformige eller noget aflange og' 

 dels mørkebrune, dels lysegule, medens de store Papiller i 

 Randen ere koniske og i Spidsen delte i et Bundt korte, 

 jevntykke Takker (Tal). I. Fig. L8). Langs ydre Rand en 

 Rad af tætstaaende. temmelig korte Oilier, der ogsaa åndes 

 sparsomt langs bagre Rand samt indover den ydre bagre 

 Del af Fladen. Fødderne med kort. tyk Dorsalknude og 

 temmelig langt fremragende Ventralknude. samt med en 

 kort Ventralcirre. der ikke naar hen til Spidsen af Fod- 

 knuden (Tab. I. Fig. 19).- De dorsale Børster noget kor- 

 tere end, men omtrent ligesaa tykke som de ventrale Bør- 

 ster, der have en udelt Spids og ere noget grovere tver- 

 taudede end de dorsale, der ere meget tæt og fint landede 

 (Tab. I, Fig. 20 og 21). Farven paa Skællene er brun 

 midt paa den bagre Del af Fladen og gaar til begge Sider 

 over i lysegult. Kroppen er farveløs. Paa Dorsalcirrerne 

 og de tynde Hovedtilhæng et brunt Baand nedenfor 

 Spidsen. 



Den norske Nordhavsexpedition. G. A. Hansen: Annelida, 



broad. The posterior pair of eyes on the crown, the an- 

 terior pair in the middle of the outer margin. PI. I. fig. 16. 

 The palps, with 6 rows of papillæ. about 4 times as long 

 as the head; base of tentacle thick, the tentacle itself 

 slender, not quite so long as the palps; the tentacular cirri 

 of. the same length as the tentacle, the antennæ as the 

 bead. These delicate appendages are distinguished by a 

 fusiform swelling below the slender extremity; they have a 

 smooth surface, whereas the dorsal cirri, of the same form 

 as the said appendages, and projecting a little beyond the 

 bristles, are densely ciliated. The scales (including the first 

 pair) are all ovato-renifonn. furnished down the posterior 

 margin with 2 or 3 large, conical, dark-coloured papillæ. 

 and along the outer margin, with from 5 to 8 of a lightish 

 yellow (PI. I, fig. 17). Viewed through a lens, the entire 

 surface of the scales, excepting only the inner anterior 

 margin, is found to be covered with minute hard protube- 

 rances. These minute protuberances are in form either 

 semi-globose or somewhat oblong, and in colour partly 

 dark-brown, partly light-yellow; whereas the large papillæ 

 on the margin are conical, and divided at the point, which 

 consists of a fascicle of short spikes, uniform in thickness 

 (PI. I. fig. 18). Along the outer margin is seen a series 

 of closely set. comparatively short cilia, which occur, too. 

 sparingly distributed, along the posterior margin, and. ex- 

 tending inwards, also over the outer posterior portion of the 

 surface. The parapodia have short, thick dorsal and com- 

 paratively long ventral protuberances, together with a short 

 ventral cirrus, which does not reach to the extremity of 

 the pedal protuberance (PI. I. fig. 19). The dorsal bristles 

 somewhat shorter than, but nearly equal in thickness to, the 

 ventral, which have the points simple, and are much more 

 coarsely dentated than the dorsal, the latter being exceed- 



4 



