ERE AN TI ATE POLYCHAETA OF JAPAN. 33 



32, 34, 44, 45, 40, 48, 50, 51, 53, 54, 5ß, 57, 58, 60, 62, 63, 



64 ; all of a more or less elliptical shape. In the anterior parts 

 they imbricate so as to cover the dorsum entirely ; in the middle 

 parts they leave on the latter rhomboidal spaces bare between 

 them ; and in the posterior parts they leave a median longitudinal 

 streak continaonsly uncovered. Dorsal surface as well as margin 

 of elytra quite smooth ; the former mottled with brown (fig. 7) ; 

 the attachment indicated by a small elliptical white spot, quite 

 laterally situated. 



Typical parapodium (fig. 8) long ; dorsal ramus represent- 

 ed by a small conical papilla with an aciculum, provided with one 

 (rarely two) minute and sharply pointed bristle with 1 2 rows of sub- 

 terminal spikes (fig. 9). Ventral ramus somewhat conical, slanting 

 ventrally ; its end divided into pro-and post-setal lobes, of which 

 the former is longer than the latter. Ventral bristles (fig. 10) 

 about 10 in number, with smooth, comparatively long terminal 

 portion, and with 2 accessory spurs in addition to 9 combs. 



Dorsal cirrus with distinct cirriphore, extending beyond tip of 

 bristles ; the style gradually tapering distally to subtermtinal bulb, 

 the basal half of which is brown, and Avhich again tapers into 

 terminal filament. Brown pigment of dorsal cirri becomes lighter 

 and lighter posteriorly on body, finally to become completely lost. 



Ventral cirrus with short cirriphore, extending slightly beyond 

 ventral base oî ventral bristles. The first ventral cirrus is peculiar 

 in that it is direr-ted straight forward along side of mouth and is 

 of the same form and c;)l(^nr as lateral tentacles, though shorter. 



Habitat :— Misaki (!). 



