ERRANTIATE TOLYCHAETA OF JAPAN. 57 



Habitat : — On a Holotliurian, obtained in tlie Uraga Channel, 

 (loptli abont 257 fathoms (Prof. Mitsukuei). 



Harniothoë stnagawaensîs n. sp. 



PI. VI, figs. 8—12. 



A single example obtained near Shinagawa, measuring 

 23 mm. in lengtli, and 4 mm. in breadtli (11 mm. including the 

 bristles). It consists of 38 segments. 



The body is pinkisli yellow, which colour, after preservation 

 in alcohol, changed into a straw yellow. 



Prostomium broader than long ; its anterior margin divided 

 into two lateral, evenly rounded, lobes. Anterior eyes large, pro- 

 vided with a distinct lens, situated on lateral sides of ocular 

 lobes. Posterior eyes placed at the postero -lateral corner of 

 prostomium, about § the diamater of the anterior. Lateral ten- 

 tacular ceratophores short and stout, shorter than broad ; styles 

 also short, tapering to a fine point ; total length of the tentacle 

 about equal to that of prostomium. 



Median tentacular ceratophore smaller tlian the lateral ; its 

 style slender, extending somewliat beyond tip of the latter. Sub- 

 tentacles large, 2% times as long as prostomium, tapering 

 gradually to a fine point. 



Dorsal tentacular cirri slender, 3 times as long as the breadth 

 of prostomium ; tlic style occupies about J of the entire lengtli. 

 A'cnlral tciitacular cirri shortoi' than the dorsal. x\ 11 these organs 

 are smooth. 



Paraped ill in (Tig. ^) long, divided into a large ventral and a 

 small dorsal ramus; the former provided on the anterior side 

 with 1\vo long, ('(^nical processes, of which the dorsal is slightly 



