Annelids from the Danmark Expedition. 413 



front eyes, which are somewhat larger than the posterior, He more 

 to the side on the boundary hne of the dorsal surface of the cepha- 

 lic lobe towards the sides. The median antenna is almost of the 

 same length as the palps and ends, like these and the tentacular 

 cirri, in a short, thread-like filament ; the paired antennae are as nearly 

 as possible double as long as the unpaired antenna's basal part and 

 decrease evenly in thickness towards the point. The unpaired antenna 

 and the tentacular cirri are sparsely beset with small, scattered cilia, 



The elytra are partly of a triangular form with rounded corners, 

 partly more elongated, reniform to egg-shaped. The surface is denselj' 

 beset with small, conical bodies with a broad base; between these 

 are long, pointed spines, which under a stronger magnifying power 

 show an extremely fine, often slightly curved point. Along the 

 posterior and outer margins of the elytra are a few scattered cilia. 

 The arrangement of the spines is not the same in all the elytra; on 

 the anterior they are to a great extent evenly scattered over the 

 whole surface of the elytron, yet in such a way that they are largest 

 and densest towards the posterior margin, as is shown in fig. 5. In 

 the elytra further back they are restricted more to the middle, where 

 they are arranged, as Moore 1. с p. 268 writes, "notably in a broad 

 irregular band, which passes across the middle of the scale in its 

 long direction". In the specimen of the Danmark Expedition, how- 

 ever, it has not been possible to follow this condition in the elytra 

 further back, as most of the el3'tra are wanting and almost all those 

 present have fallen olY and lie loose in the bottle. 



The notopodial part of the parapodium is much less prominent 

 than the neuropodial, which forms a vertical leaf with rounded 

 margin and running out in the niddle into a sharply marked, cirrus- 

 like prominence surrounding the ventral acicle. The dorsal cirrus 

 is fairly long with long end-filament and thinly beset with cilia. 



The bristles of the dorsum have the usual sword shape with 

 transverse rows of spines, which increase evenly in length from the 

 tip of the bristle downwards and again become successively smaller 

 towards the basal part of the bristle. The uppermost dorsal bristles 

 (most dorsal) are more strongly bent than the others; those in the 

 middle are the straightest. — The ventral bristles are slender, with 

 long shaft, beset with very long spines; the point of the bristle is 

 somewhat strongly curved, with a long tooth under the point which 

 bends somewhat outwards, away from the point of the bristle. The 

 most ventral of these bristles have a comparatively short terminal 

 leaf and seem all to have no tooth under the point ; those nearest the 

 notopodium have a long, narrow terminal leaf and their point is alnost 

 straight (fig. 19). 



XLV. 30 



