232 ART. II. A. IZÜKA : 



4 tentacles on tip. Anteriorly situated uniramous parapodia 

 with compound bristles ; posteriorly situated biramous parapodia 

 with simple bristles on dorsal ramus and compound ones on 

 ventral ramus. Anal cirri 2. Proboscis in extrusion long, with a 

 ring of dissimilar chitinous jaws inside the anterior margin ; 

 jaw-gland absent. 



Genus Goniada Aud. et M.-Edw. 



Body -segments divided into square fields in median re- 

 gion of dorsal and ventral surfaces. Uniramous parapodia 

 with 2 anterior ligulse ; biramous parapodia with 2 anterior 

 iigula3 on ventral ramus ; simple bristles on dorsal ramus, either 

 very fine or short and stout. Proboscis anteriorly enlarged, 

 with a row of V-shaped chitinous jaws on each side. 



Goniada japonica n. sp. 



PI. XXIII, figs. 1—6. 



A large and complete specimen, consisting of 327 segments, 

 measures 225 mm. in length, and 2.5 mm. in breadth including 

 parapodia and 1.5 mm. excluding same in 40th segment; 

 maximum breadth attained in about 150th segment, 3.5 mm. with 

 and 2.5 mm. without parapodia. 



Body consisting of the anterior region 52 mm. long and 

 comprising 76 segments, and of the posterior region comprising 

 251 segments, of which the two anteriormost segments are 

 transitional in form. 



Prostomium (fig. 1) long, conical, slightly depressed ; the length 



