Gatty Marine Laboratory, St. Andreics. 99 



section of tlic rim. Viewed antcro-posteriorly the anterior 

 or cephalic region is narrower than the second or buccal 

 part, and in lateral view the same condition exists, for the 

 nionth is prominent, three folds characterizing the outline 

 behind the median fronttil process. 



The body is nearly cylindrical behind the cephalic plate 

 (having been preserved in its tube), with the exception of 

 the slight postericu' diminntion toward the caudal funnel. 

 Nineteen bristled segments appear to be present and 

 appirently only one unarmed ring posteriorly. The 

 anterior eight are richly supplied with glands, those 

 following, especially the j)Osterior ten, being less so, the 

 Avail being more or less translucent. The median ventral 

 streak is faintly indicated, indeed, in the posterior fragment, 

 it is not easy to di~tingui>h the dorsal from the ventral 

 surface at first sight, though on sul)seqnent minute in- 

 spection a slight ridge is seen on the ventral aspect of the 

 funnel. The most characteristic feature about the body is 

 the flattened raoniliform condition of the last nine bristled 

 segments, M'hich are narrow and vase-shaped, the wide end 

 being posterior. So far as observed, no other British 

 ^Mahlanid presents a similar conformation. Behind the 

 foregoing are two rings, the funnel arising with a bro",d 

 base from the second, and showing a slight constriction 

 before reaching the rim, thus giving the outline of a dice- 

 box to the fimnel. Six of ihe subulate cirri of the funnel 

 are alike and moderately long, the scAentli or mid-ventral 

 being a very little longer, tliough externally the caudal 

 funnel seems to be long; the anal aperture is in the centre 

 of a shallow distal cup and has no cone. 



The bristles are in two groups, pale yellow stronger forms 

 nearly straight and with tapered tips and wings, and slender 

 bristles with very fine attenuate tips, appiirently smooth. 

 The first three segments liuve rather long spines, shghtly 

 curved striated organs, with a conical tip which may liave 

 a slight constriction below it. The fourth foot has a row of 

 hooks with somewhat long curved shafts, a bold shoulder, 

 bevond which is the constriction of the short neck, which 

 curves backward and enlai'ges to the crown. The great fang 

 leaves the neck at a little less than a right angle, and four 

 teeth at least occur on the crown behind it, though it has not 

 yet reached full height. There are no gular bristles. The 

 neck is obliquely and boldy striated, and an opaque region of 

 the shaft behind the shoulder is probably likewise striated. 



The typical hook is characterized by its comparatively 

 short curved shaft, high crown, and the broad strongly 



7* 



