EllEANïIATE POLYCIIAETA OF JAPAN. 61 



finely sernilafco, and distinctly bifid tip ; in the region of the 

 enlargement is a half ring of long, fine, comb-like teeth supported 

 on a slight shoulder (fig. 6). Inferior ventral bristles (fig. 7.) 

 provided with shorter, stouter and more strongly hooked and 

 undivided tip. 



Dorsal bristles arranged in an obliquely fan- shaped series ; 

 they are shorter than the ventral, slightly curved ; the more 

 dorsally situated bristles (fig. 4) are slender, slightly curved, 

 thorn-like, without any teeth ; the inferiorly situated dorsal bristles 

 are stronger, and provided with a tooth below tip (fig. 5). 



Both dorsal and ventral bristles are colourless and beautifully 

 transparent. 



Elytra in 15 pairs, borne on segments: 2, 4, 5, 7 



19, 21, 23, 2(j, 2!J, 32. All are in symmetrical pairs, excentrically 

 attached and can be easily detached. They are thin, transparent 

 and colourless, having neither cilia nor papilla?. 



Habitat : — South of Jogashima in Sagami Sea, about 313 

 fathoms (Mr. K. Aoki.) 



Scalisetosus forniosus Moore. 



PI. Xll, ligs. 17—10. 



1903. Scalisetosus forniosus, ]Mooi'e. I'roc. AcjkL Nat. Sc. riiiliid., ^ ol. 

 LA', p. 103. 



Ijody sicuilcr, tapci-ing very slightly toWcU'd the [)osterior iMid ; 

 liMiglh 2 1 — ■:')<) imn., ('(>nsisLing of .')7 — 70 segments; maximum 

 width 2. — ;).2 111111. wifhoiit. and 4.5 — (i mm. wilh, parapodici. 



Prostomiiiiii ahotil as broad as long, marked for its entire 

 leniitli Iiv a nicilian dorsal "I'oonc which widons anteriorlv into a 

 broad aiiil (Icop clrl't s('j)araLiiig ihe rounded frontal peaks; 



