from the ,\nrt/i Set au<l culjticent parts. 247 



No mention of tins species is ina<l(' hy Iziika or dm wiilci- 

 of tlic * Cliallt'ii;,'cr ' Kej)ort, altli()iii;li the i^'cmis Kumenia 

 lia.s one rcpresi-ntative among the ' Challen;;ei- ' worms, viz. 

 Kunien'ut reticulata, which ditfers from Theel'a Eumenin 

 longisetosa in that the dorsal himellaR commence at th*^ 

 fifteenth instead of at tlie tentli foot. Eumenia jcffnnisu 

 extends to Norway, and Dr. (iwyn Ji-HVeys dredged it'otf 

 the llel)rides and the Shethuid Isles; bnt there is reason to 

 helieve that it ahonnds in more northern hititudes. 



The head is bluntly conical in shape, contracted in appear- 

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

 Tlie body is maggot-like, deep reddish l)rown in colour, 

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

 represented by dorsal and ventral pads, from which the bristles 

 l)roject. The bristles are long, linear, and translucent; while 

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

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

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

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

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

 of small papilla?, which give the animal a rough, wartv 

 appearance. 



Although the animal is short, tiie gut, wiien exposed, is 

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

 ■whore the sacculations occur. The guf-wall is very thin, and 

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

 which differs in ai)pcarance from the dark green-coloured 

 fjEcal packets found in lljalinaxla tubico/a<iud other Eunicidje. 

 The mouth opens into a buccal cavity, which leads into 

 a short but fairly wide (jesophagus, which, 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 tlic 

 posterior region of the gut, yet often having extensions iu 

 the anterior end. This mass was composed of ova iu some 

 cases and in others of spermatozoa, which were aggrofrated 

 together to form spermatophores, wliich were almost as large 

 as the ova, but whieii did not jiossess zonaj. In the anterior 

 region the gut is moored in jjosition by tive or six niosenteries, 

 which are very thit\ and which stretcli 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 huge bilobed br.iin, which givesoifa ventral 



17* 



