EIIRANTIATE POLYCHAÜTA OF JAPAN. 



25 



Elytra in 12 pairs borne on segments 2, 3, 

 4, 0, 8, 10, 12, 14, 16, 18, 21 and 24. They 

 are strongly imbricated, membranous but tough, 

 firmly attached. They are generally of an elongate 

 pyriform shape, posteriorly more ovate, attached 

 at a point behind the middle ; with exception of 

 a narrow smooth area at the anterior end, the 

 entire dorsal surface is thickly beset with papil- 

 lae of various configuration, viz., those of a coni- 

 cal shape, those of a similar shape but with a 

 few jagged points on apex, those of a somewhat 

 club-like shape, and those of a globular shape. 

 A fringe of long and strong cilia lines the pos- 

 terior external margin of typical elytra, and 

 nearly encircles the first elytron ; longest 

 cilia with a length equal to about J or ^ the 

 elytron, 

 of p.caeiom 332/1. Habitat : — Sagami Bay, 153 fathoms ; Suruga 



[After J. p. Moore], p^y, 03— 75fathoms ("Albatross"). 



Polynoc 2*leio2^lü ^larenzoUer. 

 PL Xd, figs. 12—14. 

 1879. Polyiioë pleiolepis, ]\rnrenzeller. Südjap. Anuel. p. 6". 



The body, with 30 parapodiated segments, measures about 

 30 mm. ill length and 5 inm. in breadth excluding the bristles, 

 and ta])ers toward ])otli anterior and posterior ends. 



Colour of body grayisli yellow, witli 4 wliitish elevated lines 

 on the dorsum of segments. 



Prosfcomium as long as broad, with a median shallow groove 



