from the North Sea and adjacent parts. 247 



No mention of tliis species is made by Izuka or tlie wrifer 

 of the 'Challenger' Keport, aUhouo-h the genus Eumenia 

 has one representative among the ' Challenger ' worms viz. 

 Eumenia reticulata, which differs from TiieePs Eumenia 

 longisetosa in that the dorsal lamella! commence at the 

 fifteenth instead of at the tenth foot. Eumenia jeffreysii 

 extends to Norway, and Dr. Gwyn Jeffreys dredged it off 

 the Hebrides and the Shetland Isles ; but there is reason to 

 believe that it abounds in more northern latitudes. 



Tiie head is bluntly conical in siiape, contracted in appear, 

 ance, and has a slight median groove, but bears no tentacles. 

 The body is maggot-like, deep reddish brown in colour, 

 which is often deeper in hue at the ends, and the feet are 

 represented by dorsal and ventral pads, from which the bristles 

 project. The bristles are long, linear, and translucent; while 

 the spines which support the feet are stout and strong, althouoh 

 fairly short. There are no anal cirri, while those on the teet, 

 if present, are rudimentary. Each segment has three rinos, 

 of which the posterior, bearing the feet, is the most pro- 

 nounced. Each ring, moreover, is formed by an aggregation 

 of small papillse, which give the animal a rough, wartv 

 appearance. 



Although the animal is short, the gut, when exposed, is 

 fairly long, sacculated in appearance, and is of great width 

 where the sacculations occur. The gut- wall is very thin, and 

 the gut-contents can be easily seen as a yellowish-green mass 

 which differs in appearance from the dark green-coloured 

 fsecal packets found in Hyalinoscia tubicola a.nd other Eunicida3. 

 The mouth opens into a buccal cavity, which leads into 

 a short but fairly wide oesophagus, whicli, in turn, enters a 

 muscular stomach cubical in shape. From the posterior end 

 of the stomach the gut extends to the anus, which is a promi- 

 nent aperture at the tip of the tail. In several of the examples 

 there was a large reddish-coloured mass surrounding tlie 

 posterior region of the gut, yet often having extensions in 

 tlie anterior end. This mass was composed of ova in some 

 cases and in others of spermatozoa, which were agaieoated 

 together to form spermatophores, which were almost as lar"e 

 as the ova, but which did not possess zonaj. In the anterior 

 region the gut is moored in position by five or six mesenteries, 

 which are very thin and which stretcU from the wall of the 

 gut to the body-wall. There may also be one or two at the 

 posterior end. A rich supply of blood-vessels and nerves 

 extends along the whole alimentary canal. 



The nervous system of this species is very well developed. 

 There is a fairly large bilobed brain, which gives off a ventral 



17* 



