EEEANTIATE POLYCHAETA OF JAPAN. 157 



large, black ; those of the posterior pair with lens, situated close 

 to tlie hind margin of prostomiuni ; those of the anterior pair 

 larger, and elliptical in outline. Tentacles much shorter than 

 J the distance between the two posterior eyes. Palpi as long 

 as prostomiuni. 



First body- segment J as long as prostomiuni. Tentacular 

 cirri non -articulated, the longest reaching to the 5th and the 

 shortest to the 3rd segment. 



Parapodium (the 15th) about as long as high. The dorsal 

 ramus larger than the ventral, which it slightly overlaps an- 

 teriorly ; with two long, pointed, conical superior and inferior 

 ligulae, and a short, slender, presetal lip ; dorsal cirrus very 

 slender, arising from the basal -!|- of superior ligula and ex- 

 tending scarcely beyond tip of same. Ventral ramus with an 

 elongated conical inferior ligula and a slender lip, which di^•ides 

 at the end into a short and broad presetal and a very long and 

 slender postsetal process ; ventral cirrus small and slender, its 

 origin distinctly separated from base of ventral ramus, and its 

 lip not reaching the middle of infcTior ligula. 



Bristles in part with setose, and in part with falcate, end-piece. 



Paragnathi brown, small, conical, the posteriorly situated ones 

 in eacli group somewhat larger : I. 5 in a longitudinal series ; II. 

 ill an oblique elliptical group, in 3 rows (an anterior lateral row of 

 about 4, a middle row of (5, and a posterior internal row of 5) ; III. in 

 a small longitudinally elongated group of about 10 ; lY. in a nearly 

 cii'cular gi'oup of about 20 ; V., VI., VII., VIII. absent. Maxillae 

 with 3 teeth in the basal half, which are separated by a wide 

 interval from a 4th double tooth situated near the terminal fang. 



Habitat ; — Suruga Bay, ßö — 75 fathoms (" Albatross ") ; 

 Sagami Bay (Mr. K. Aoki). 



