EKllANÏIATE l'OLYClIAEïA OF JAPAN. 11 



Polfjnoë ijhriai ii. sp. 



PL m, figs. 5—6. 



This form npproachos Polijno'è gijmnonota Marenz. very closely, 

 but careful examination reveals points of difference sufficiently 

 warranting its specitic distinction. 



The general colour of body is much lighter than in the species 

 referred to, while the parallel transverse lines occuring near the 

 posterior border of segments arc of a light brownish colour instead 

 of being reddish. 



Prostomiujn almost white, with two pairs of deep brown 

 eyes ; tentacles, tentacular cirri and subtentacles are all of a 

 l)urplisli hue. 



Ventral cirri much shorter than in Folyno'c gijuinonota ; each 

 with a very faint brownish band suri'ounding it at about the middle 

 of its length. 



Ventral bristles (tig. 5) are of a much lighter yellow in colour 

 and ai'e more slender, with the terminal portion more strongly 

 curved than in Polynoc (jyinnonoia. 



As in that species the elytra are present in 12 pairs, but their 

 colouration is (|uite different. While their anterior parts are almost 

 white (lig. (i), the reddisii brown coloured posterior parts show 

 lighter coloured small spots scattered all over. The middle parts 

 show some irregulai'Iy d ist ri bated brownish pigment spots, and the 

 point of attiiclnnciit is indicated only liy an ill-dehned oval white 

 spot, wliieli ill one part is in direct continuation with the white 

 area. 



Two cxa,tni>Ics oT this now species were collected and pre- 

 served in formalin by I'rof. 1. Ijdia in Sakhalin in the summer 

 of 1900. 



