50 AET. II. — A. IZÜKA : 



bricata, but the pigment band at the base of the distal swelhng, 

 as also another faint band situated above that swelling, is black. 

 The transition of the swelling to tlie terminal filament is abrupt, 

 presenting an appearance as if there existed an articulation at the 

 boundary (fig. 6). 



The tentacles and cirri are all entirely smooth. 



The dorsal (fig. 7) and ventral (fig. 8) bristles closely resemble 

 those of H. imbricata. 



The 15 pairs of elytra are all similarly coloured and destitute 

 of marginal fringes. 



Habitat : — Shimushu Is., one of the Kuriles, 4 fathoms (Mr. 

 K. Yendo). 



JlamiofJioë Icnnellifera (Marenz.). 



PI. V, figs. 9—11. 



1879. Poljiioë (? Lauilla) lamellifera, Marenzeller. Siidjap. Amiel., p. 7 ; 

 Tab. I, fig. 5. 



Several examples of this species were obtained at different 

 times in Misaki and vicinity. 



The largest specimen in my hand measures 46 mm. in 

 length, and 12 mm. in breadth including bristles and parapodia ; 

 it consists of 40 segments. The smallest one, consisting of 39 

 segments, is 30 mm. long and 9 mm. wide. 



On the posterior border of each segment, just at the base of 

 each parapodium, there exists a small semicircular lamella 

 directed postero -laterally. This lamella lies posterior and internal 

 to the small ventral (or nephridial) papilla, and extends a little 

 beyond the anterior margin of the succeeding segment. 



The colour of body in living specimens is grayish yellow, 



