from the North Sea and adjacent parts. 171 



According to Professor M'lntosli (1900, p. 297) the cilia 

 along the outer edge of the scale end in probe-points, the 

 majority ot which are shown in his text-tigure to have 

 puinted tips. In the present specimens the free ends of the 

 cilia show rather a blunted or rounded condition. The 

 suiface of the scale is covered with small tubercles. 



I'he bristles are of two types only. The dorsal setse are 

 long, end bluntly, and are spinous for nearly their complete 

 length. The ventral setse are graceful ; the naked terminal 

 region is large and hooked, and is tapered gradually until it 

 curves to a line point. The ventral line of this region is 

 slightly convex, differing thus from the same part of the 

 ventral bristle of ]£. nodosa. The bristles of the first foot 

 ])artake of the same characters as the bristles of the succeeding 

 segments, the ventral being rehitively more slender. 



One of the posterior dorsal cirri of one specimen has a 

 bifid tip, which condition is no doubt an abnormality. 



This species seems to be found only in deep and cold 

 water. All records of it so far confine it to the Faroe 

 Channel. 



Genus Lagisca, Malmgren, 1865. 

 Lagisca Jloccosay Savigny, 1820. 



This annelid is obtainable at all points off British shores, 

 and in some parts is very common. In the present collec- 

 tion fragments are more numerous than complete specimens. 

 iS^evertheless it is easily possible to establish the fact that, 

 of the total number of complete specimens and fragments, 

 GO per cent, are of the variety mentioned by M'lntosh 

 (1900, p. 302). The characteristic serving to distinguish the 

 variety from the normal specimen of L.floccosa is the con- 

 dition of the tip of the dorsal bristle. Ordinarily the dorsal 

 bristle has a sharply pointed tip; the variety shows a blunted 

 and shortened tip. In several of the examples a form of 

 dorsal bristle intermediate between that of the normal and 

 that of the variety occurs. The tip of the bristle is in this 

 case not so elongated as in the normal form or so blunted as 

 in the variety. Its shape is quite distinct from that men- 

 tioned by M'lntosh and figured (1900, p. 302, pi. xxxviii. 

 fig. o) by him from a specimen obtained by the ' Porcupine ' 

 Expedition (1S69-70). 



It is unfortunate that none of the specimens or fragments 

 possess a single scale. It may have been possible to correlate 

 variation in the dorsal bristles with variation in the shape, 

 number of tubercles, or coloration of the scales. 



