lOG AET. II. — A. IZUKA : 



Bristles in 4 kinds, of wliicli two are coarse nncini. Com- 

 pound uneini confined to anteriormost 4 parapodia ; tlieir appendix 

 curved, bifid, the terminal process large and hooked, the acces- 

 sory process much smaller, both included in a guard. From the 

 5th parapodium posteriorly, simple uneini replace the compound 

 uneini just described. They are yellow, stout, nearly straight, 

 subterminally slightly swollen, the end provided with two 

 processes, of which the proximal is the larger ; guard obliquely 

 fan- shaped and striated ; stem rather coarsely striated. Slender 

 and pointed bristles occur in all parapodia except the first. The 

 4tli kind of bristles begins to appear in the 2nd parapodium. 

 They have a slender stem terminating with a delicate funnel-shaped 

 enlargement with crenulated margin. 



Habitat : — Sagami Bay, about 310 fathoms (Mr. K. Aoki) ; 

 Suruga Bay, 167 fathoms (" Albatross ") ; Sagami Bay 153 fathoms 

 ("Albatross"). 



Oniiphis holohranchiafn Marenz. 

 PL Xr, figs. 10—12. 



1879. Onnpliis lioîobranchiata, Marenzeller. Siidjap. Aimel. L, p. 24 ; 



T.-if. IV, fig. 1. 

 1903. Onupliis liolobrancliiata, Crosslaiid. Marine Fauna of Zanzibar 



and Brit. East Africa. Proc. Zool. Soo. London. Vol. IL, p. 135. 



The colouration of the living animal is characteristic. Funda- 

 mentally it is of a light flesh-tint ventrally and a light yellow- 

 Ijrown dorsally witli metallic iridescence, but a small area in the 

 middle of each segment is white. The dorsal surface, however, 

 as far down as the 30th segment, is largely covered with mark- 

 ings of a rather dark purple-brown colour. These markings are 

 most numerous and closely placed at tlie l)ase of parapodia, witli 



