314 LBIOOHONE (CLYMENE) EBIENSIS. 



tip, where they extend forward to the apex, and they vanish in specimens long preserved 

 in spirit. Similar groups of eyes are observed in the aberrant Branchiomaldane Vincentii 

 of Langerhans, 1 as lately described by Dr. Ashworth. 2 



The mouth opens in the usual position— ventral and posterior to the frontal process. 

 The body is of considerable length, viz. 5 to 6 in., rounded, with a distinct mid-ventral 

 ridge, which is continued backward to the edge of the anal funnel, and in one example has 

 twenty-two bristled segments and four devoid of bristles posteriorly. The first bristled 

 segment is about a third longer than the cephalic lobe in a good preparation, and bears 

 about a fifth from its anterior border a small tuft of bristles and ventrally three hooks, 

 the crowns of which are less elaborately formed than in the posterior hooks and are devoid 

 of gular bristles. The second segment is more elongated, and, like some of the segments 

 which follow, is distinguished by an anterior whitish glandular region, the bristles and 

 hooks being at the posterior border thereof, viz. about the anterior fourth of the 

 segment. The two succeeding segments (third and fourth) are similar, but the fifth and 

 sixth are somewhat shorter and thicker — all, however, in the preparation showing the free 

 fold of the anterior border, which in a manner ensheaths the posterior end of the preced- 

 ing segment. The third segment has a tuft of bristles and four hooks, the tips of which 

 are also rudimentary and the throat devoid of gular bristles. The 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. Behind the foregoing a change in the arrangement of the 

 segment-junctions occurs since the densely whitish glandular region of the eighth segment 

 passes slightly forward on the seventh ventrally, thus the free margin so characteristic 

 of the preceding segments is lost. The anterior border of this curved white region, 

 however, really marks the segment-junction, though in the 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 much expanded, but its edge is perfectly smooth, and the anal cone is in 

 the centre. The whole somewhat resembles the anal funnel of Theel's Praxilla polaris. 

 De St. Joseph describes the anal segment as sometimes long, sometimes short, but such 

 would appear to be due to injury and regeneration. 



The stronger bristles (Plate CIX, fig. 10) have stout shafts and finely tapered, slightly 

 curved tips with distinct wings. De St. Joseph describes the shorter and more slender 

 bristles as pinnate. This has not yet been seen in the preparations. ■ 



The hooks (Plate CIX, figs. 10 a and 10 b) are remarkable for their comparatively 

 straight shafts, only a slight curvature being present ; for the rather indistinct shoulder, 



1 f JNTova Acta Acad. Leop.-Car./ Bd. xlii, no. 3, p. 116, figs. 21a, etc. 



2 ( Proc. Roy. Soc. Edinb.,' vol. xxxii, p. 62, with plate, 1912. 



