from the North Sea and adjacent parts. 243 



tlian anteriorly. The dorsum is more convex than tlie 

 ventruni, but the convexity is lost in the caudal region, 

 which is somewhat flat and strap-shaped and terminates in 

 two anal cirri. 



Anteriorly the body has a rich golden-brown colour, 

 which gradually changes to yellowish white posteriorly. 

 The body-wall is thin and transparent, and the simple 

 straight gut with its contents shines through, thus reminding 

 one of the condition prevalent in the posterior region of 

 many of the Eunicidse. 



The proboscis is fairly long, being about one-third the 

 length of the entire animal, and presents a hard and very 

 muscular appearance. It is richly covered witii minute 

 papillae, which, according to the Monograph*, are filiform, 

 with crenated edges. The tip, which is much wider than 

 the base, roughly forms a square, at whose corners is placed 

 a black, spurred, powerful tooth. The teeth are sunk in 

 bulb-like muscular pads, the opening of the proboscis buing 

 where the pads meet in the centre. The organ is pinkish in 

 colour and has many minute transverse striae. 



The feet are slender and appear on the anterior ring of the 

 segment, a condition reversed in Eumenia jeffreysii, where 

 the feet are borne on the posterior ring. They are white in 

 colour and semitransparenf. The example is so small that 

 the anterior feet could not be removed without incurring 

 serious damage to the animal ; however, a lengthy account 

 of them can be had in the Monograph. The feet from the 

 twentieth were found to be quite typical, although the 

 bristles were much more slender than tiiose of the type-series. 

 The specimen was not mature, but in this species epitokous 

 forms appear which have larger bodies, longer and more 

 prominently marked feet, and more attenuate bristles. From 

 observation the animals ripen and shed their sexual products 

 in the montli of July. 



Family Ariciidae. 

 Genus Aeicia, Savigny, 1820. 



Aricla ciivieri, Audouin and Edwards, 1833. 



The distribution of the above family is very uncertain, 

 and several well-ktiown Earoi)ean forms extend to the shores 

 of North America, wliere they have received different names. 

 The members of the family frequent deep or inshore waters. 



* fide 'Monograph,' vol. ii. part ii. p. 480. 



