EEIÎANTTATE POLYCHAETA OP JAPAN. 87 



length and witli similarly blnnt tip. All tlio tontacles narrnwod 

 at tlio avticnlation near base. 



Elytra tliin, not coverins; the dorsum anteriorly, eonsiderably 

 smallei- than tliose usually seen in that region in other species of 

 tlio groiij). The Hrst elytron is small, rounded ; its surface and 

 margin smooth. The second elytron has along its outer 

 Ix^rder 5 or digitate processes, some of the stems being undivided, 

 others bifid or trifid. The elytra increase in size after the third, 

 and their outer margin is furnished with well-marked papillae. 

 In shape they are irregularly quadrate with straight outer 

 margin. The papillae are in a single I'ow, and commence to exist 

 at the anterior angle in the form of a process or two with tip split 

 into three long digits ; in the succeeding papillae the digits reach 

 four or five in number, and toward the posterior l)order they again 

 diminish in number to three, and finally become a simple process. 



Parapodiinn (in the anterior third of body) has superiorly 

 a branchial process, two ciliated cups on the dorsum, and a process 

 in the Innev angle nnder the brancliia ; the dorsal ramus bears 

 sci'i'atcd setae (fig. 2). Ventral ramus of parapodium bears a group 

 of bifid setae arranged in three series, those of the upper and lower 

 scries htiving longer ti}) than in the middle. Some bristles of the 

 lower series in the anterior third of the body show two segments 

 ill the term il I'll portion. The middle series of bristles present a few 

 spinous rows below fi]) of shaft; the terminal bifid piece moder- 

 ate 'K' e long; it e(l. 



\'eiitr;il eirriis somewhat long, its slightly l)ulhous tip ex- 

 li'iidiiig eoiisiderahly J)eyoiid the setigerous lobe. There are several 

 small papillae in front of and behind the pedicle foi' elytra, and 

 one paiiiiia on the \ciilral margin of the ])arapodium on the iimer 

 si(le ( if cirrus. 



