ei;i;axtiate tolychaeta of japan. 107 



tlio except ion oi" tbo lirst 3 or 4. On cither öide of the white 

 ceutnil nifirks are slender transverse lines, present in three pairs 

 to each scanne lit. 



The l)u(ly nieasin'es iiboiit 00 mm. in length, comprising 

 altout 1 'JO segments, and 4 mm, in breadth excluding bristles and 

 para[)0(lia. 



Prostomiiim colourless, ])iit witli a violet spot in the middle 

 biie. The median tentacle reaches to 7th segment ; the inner 

 lateral is a little shorter, its basal joint being, however, a little 

 longer than, that of the median tentacle. The basal joint of outer 

 lateral tentacle is longer than tliat of the inner paired one ; the 

 styles nearly equal in length to the basal joint, stout, scarcely 

 reaching I the length of inner tentacle. The short and thick 

 frontal tentacles about as long as the prostomium itself; the 

 stouter pal[)i are somewliat longer. Eyes 2, situated outside the 

 inner i)aired tentacle. 



Peristomium ;> times as broad as long, with 2 tentacular cirri 

 OÏ about the lengtli of the segmeJit. 



Each parapodium provided with a single l)ranchial liJanient. 



First 4 ])airs of para podia with a conical posterior and a 

 siiKill jingcrdüvc anterior lobe each, and also with a well-developed 

 \cnhal ciiTus. bVom the '»th parajnxliuni ])ostcriorly the ventral 

 cirrus and tli<' anlciioi' lobe are not observed. The branchial 

 lilanicnl inci'cascs in length })osteriorly, so that in the oOth 

 scgnionf. llic lip.^ n\' branchiae on l)oth sides of the body cross 

 each ol'ier n\r\- (lie Mie(liaii line of I he dorsal surface. 



I'ri>(les in I kinil>: l>lly. I he eempound liristles with a large 

 an^l ;i ^niall leelh below the terminal fang (tig. 11,); 2]idly, the 

 >iniple ;iiii| gnni'deij bristle ; iirdly. the line pectinate lu'istlc ; and 

 Il hi), a lar-e hoi'k with -J large eui'ved teeth (lig. 1 2). 



