EKEANTIATE POLYCHAETA OF JAPAN. 187 



sisting of 19 segments besides the anterior eye-bearing and tlie 

 posterior anal segment. The body is much flattened ; length 2.4 

 mm. ; maximum breadth at about the 8th segment, 1.0 mm. 

 including tlie parapodia. An accumulation of sexual element 

 (spermatozoa) fills up nearly the entire space of the body- 

 cavity as well as its extensions into parapodia. The attachment 

 of tlie buds to the mother individual is effected by a short 

 pedicle at the anterior extremity, just in front of the eye-bearing 

 segment. 



Habitat : — The unique specimen was found crawling upon a 

 block of stone brought up from a depth of about 7 fathoms, off 

 the western coast of Jögashima, Misaki (!). 



Genus Syllis Savigny, 



Prostom ium with three tentacles ; tentacular cirri in two pairs, 

 all nioniliform. Palpi separate throughout. Body more or less 

 elongate, witli distinct segments. Opening of pharynx (proboscis) 

 with papilla3 only ; armature of same a single antero-dorsal tooth. 

 Proventriculus short, two T-sliaped glands behind. Parapodia 

 with moniliform dorsal and filiform or pinniform ventral cirri. 

 Bristles falcate witli sliort terminal-piece ending with a single hook, 

 or simple. Anal segment with two elongated cirri. 



Eepi'üdiictiou normal, oi' by alternation of generations. 

 Sexual individuals furnished only with two tentacles, and devoid 

 of tentacular ciii'i. Sexes similar. 



Sf/Uis ramosrt Mcintosh. 

 PI. XX, iigs. 7—8. 



Ls7'.). Syllis ramos.1, ]\JcTiitosli. Jonr. Linn. Soc. Loudon (ZooL), Vol. 

 XIV, p. 720. 



