EREANTIAïE POLYCHAETA OF JArAN. 2/ 



with a deep black 8pot on the inner side of the whitish scar at 

 the attachment to elytrophore. Outer and posterior margins with 

 numerous long filiform papillae. The papillae on the upper sur- 

 face are of three kinds; the first and the smallest kind is conical 

 and about as high as broad ; the second, found along the 

 posterior border of elytron, is long and cylindrical with numerous 

 largo spines ; the third consists of very large forms densely co- 

 vered with very small spines, but there are several intermediate 

 forms between the second and the third kind. 



Habitat : — Yenoshima (Marenzeller) ; J^agami Bay (!). 



Folynoë vexillavia (Moore). 



PI. I, fig. 2 ; PL III, figs. 12—14. 



1903. Lepidonotas (Hylosynda) vexilbiiius, Moore. Pioc. Acad. Nat. 

 Sc. Pliilad. Vol. LV, p. 415. 



A large specimen, consisting of o7 segments, of which 35 

 are setigerous, measures 42.0 mm. in length, 4.5 mm. in maximum 

 breadth of body at about the 10th segment, 7.5 mm. including 

 the parapodia and 10.0 mm. between tips of bristles. 



Prostomium slightly wider than long. Eyes circular ; anterior 

 pair larger than the posterior, situated close to lateral margins at 

 widest part of prostomium ; posterior eyes on postero-lateral cur- 

 vature of same. 



Ccratophore of median tentacle about § as long as prosto- 

 mium, wliite with a very conspicuous, circular, light-brown spot 

 nearly covering the dorsum of the basal half ; style scarcely 3 

 times as long as i)rostomium, with a subterminal bulb and a de- 

 licate terminal lilaiucnt wliich makes u}) distal -J of the entire 

 length ; dark-browuish at base, distally gradually fading into 



