Gallij Marine Laboratory, St. Andrews. 07 



bristles and vcntrally three hooks, the crowns of wliich 

 are k?ss ehiborately tbrnuul than in the posterior hooks and 

 are devoid of j^nlar l)ristles. Tlie second segment is more 

 olon<^:ited, and, like some of tiie sc;;ments which follow, is 

 distinji^uishcd by an anterior whitish glandnlar rej^jion, the 

 bristles and hooks being at the posterior border of the latter, 

 viz. about the anterior fourth of the segment. The two 

 succeeding segments (third and fourtli) are similar, but the 

 fifth and sixtli are somewhat shorter aiul thi(;ker — all, how- 

 ever, in the ])reparation showing the free fold of the anterior 

 border, which in a manner ensheaths the posterior end of the 

 preceding segment. The third segment has atu:t of bristles 

 and four hooks, the tips of which are also rudimentary, and 

 the throat devoid of gular bristles. 'J'he fourth, on the 

 other hand, has a considerable number of hooks, viz. nineteen 

 or twenty, with normal crowns and a tuft of gular bristles. 

 The seventh has also the free and densely white glandular 

 anterior margin, intensified by the dark hue of the region 

 behind, and the bristles and hooks are similarly placed. 

 13ehind the foregoing a change iu the structure of the 

 segment-junction occurs, since the densely whitish glandular 

 region of the eighth segment passes slightly forward on the 

 seventh vcntrally, so that the free margin so characteristic of 

 the preceding segments is lost. The anterior border of this 

 curved wliite region, liowever, really marks the segment- 

 junction, though in a specimen from Jersey this feature is 

 not so distinct as in the others, probably from less perfect 

 preservation. The foot of the eighth segment with its 

 bristles and hooks is situated posteriorly, and thus a change 

 in the position of the organs is inaugurated, the segment- 

 junctions immediately succeeding the bristle tufts from the 

 ninth inclusive. The last five or six bristled segments are 

 considerably elongated. The posterior end appears to be 

 composed of six segments, four of which have slight glandular 

 elevations to indicate the position of the bristle-tufts and 

 hooks of the other segments, for they are absent in these. 

 The terminal rim or funnel is mucb expanded, but its edge 

 is perfectly smooth, and the anal cone is in the centre. The 

 whole somewhat resembles the anal funnel of The^d's Praxilla 

 polaris. 



The stronger bristles have stout shafts and finely tapered, 

 slightly curved tips, with distinct wings. The hooks are 

 remarkable for their comparatively straight shafts (only a 

 slight curvature being present), for the rather indistinct 

 shoulder, for the shortness of the main fang which comes off 

 nearly at a right angle to the neck, which increases in 

 Ann. cfc .1%. .V. Hist. Ser. 8. Vol. xi. 7 



