334 EUCLYMENE. 



The typical hook, as at the eighth segment (Plate CX, fig. 5 d), has a remarkably high 

 crown, and neck and shaft are nearly equal in length. The shaft dilates from the base 

 up to the shoulder, then the neck is constricted off, and again dilates to the toothed 

 hatchet-shaped crown, which, with its six or seven teeth, rises high above the main fang, 

 which makes less than a right angle with the neck, and has a distinct indentation of 

 the throat beneath it, opposite which, on the side of the hook or at the notch in the throat, 

 a comparatively short tuft of gular bristles on each side slopes upward and forward 

 instead of curving gently outward and bending round the tip of the great fang as ordinarily 

 seen under a cover-glass. The neck is obliquely striated, and longitudinal strias occur at 

 the upper end of the shaft. Posteriorly little change takes place in the structure of the 

 hook, the proportions of shaft and neck being nearly the same, but in the last row the 

 number of teeth above the crown is greater. For comparison the hooks of Axiothella 

 catenala are shown in Plate OX, fig. 4 a. 



The tube appears to be free, and to be composed of sand, minute fragments of shells, 

 Foraminifera, and secretion. 



This species in 1868 was confounded with Axiothella catenala, Malmgren, and hence 

 the description of the apparent differences between them, as indicated in a former paper. 1 

 Malmgren's description and figure of Axiothella catenala are excellent. It comes near 

 Heteroclymene and Pseudocli/mene, but agrees with neither. 



Genus OXXIV. — Euclymene, Verrill, 1900. 



Cephalic region with glands; nuchal organ somewhat long; distinct cephalic rim. 

 Proboscis with flat papillae. No collar. Anterior segments of body with conspicuous 

 glandular belts. Segment with collar absent. The somewhat large hooks of segments 

 1 to 3 more or less modified, with gular bristles. Feet of the eighth bristled segment 

 posterior to the middle. Behind the unarmed segments are a prominent ring and a vase- 

 shaped anal region. Ventral cirrus of the latter is longest, the upper cirri shorter. Anal 

 cone lies in a funnel-like cavity. Anterior bristles with wings, and some with a terminal 

 pencil. The posterior have narrow wings and smooth tips. Tube free, straight, and 

 somewhat thick. 



Synonym. 

 1913. Euclymene (A), Mcintosh. Ann. Nat. Hist., ser. 8, vol. xi ; p. 117. 



Two fragments, viz. a funnel and a segment of a form apparently a .Euclymene, 

 were dredged in the ' Porcupine ' Expedition of 1869, in 370 fathoms in muddy sand, off 

 Ireland. The funnel, which may belong to a species different from the other fragment, has 

 thirty-four cirri, that opposite the ventral ridge being about double the length of the 

 others. All are conical, flattened cirri. The rim is only slightly wider than the base, and 

 no contraction occurs in the middle. The basal rim, from which the funnel arises, is sloped, 

 and a single unarmed segment is attached to it. 



1 ' Trans. Eoy. Soc, Edinb./ vol. xxv, p. 420. 



