EßKANTIAlE POLYCHAETA OF JAPAN. 231 



somewhat pinnately and tlms form a bush of filaments. 



Simple dorsal cirrns small and filiform, arising on the inner 

 or dorsal side of the bnncli of dorsal bristles, slightly exceeding 

 branchial filaments in length. xVrticulated dorsal cirrus, arising 

 just posterior to the bunch of dorsal bristles and lateral to 

 branchial tuft, consists of a stout cylindrical cirriphore and of a 

 long slender style, the tip of which reaches nearly to tip of 

 bristles. The ventral cirrus is short, not reaching to tip of ventral 

 bristle-tuft in the anteriorly placed few segments ; in the middle 

 parts of body it is about J as long as the bristle-tuft. It is at- 

 tached to the posterior side of the ventral border of parapodium. 



Dorsal bristles form a slightly curved row, with the convexity 

 directed forward. Each is long and bifurcated, having the tip 

 shaped as shown in PI. XXII, fig. 10. Ventral bristles form a 

 vertical row, and are less numerous than in the dorsal row ; and 

 compared with the dorsal bristle, they are more slender and make 

 wider angles at bifurcations (fig. 11). 



Anus, a large round opening, lies in the anterior § of the 

 26th parapodiated segment. The large size of the anal opening 

 may be; in relation with tlie circumstance that a pretty large 

 fragment of a gasteropod shell (a small Purpura) is contained 

 just within it. 



Habitat : — Naha in Okinawashima, one of the Loo-Choo Is- 

 lands 



Family Goniadidae. 



13o(ly long, slender, slightly depressed ; consisting of nu- 

 merous segments, partly with uniramous and partly with bira- 

 mous paraix)dia. I'rostomium small, conical, annulated, with 



