30 AKT. II. — A. IZUKA : 



Remarks : I have obtained this species in abundance between 

 tide-marks and also in depths down to about fathoms at Mi- 

 saki and vicinity. 



The breeding season extends from March to April in Misaki. 

 In matures females the colour of body approaches deep greenish 

 black, while in males it is generally reddish brown. The dorsum 

 of the body is marked with a brown spot on every segment, but 

 sometimes these spots begin to fade away from about the loth 

 segment posteriorly. The colour in living specimens obtained in 

 Aomori Gulf tends to a yellowish brown. 



Polynoë semlerma Moore. 



1903. Polynoë semierma, Moore. Prop. Acad. Nat. Sc. Pliilad. Vol LV. 

 p. 402, PL xxiii, fig. 2. 



This species was described by J. P. Mooke from a specimen 

 with imperfectly preserved prostomium and with all appendages 

 lost except one palpus (subtentacle). I have not obtained a speci- 

 men that could be identified with this species, so that I extract 

 the following characters from Mooee's description. 



Left palpus 4 times as long as width of prostomium, slender, 

 gradually tapering. Eyes very small, circular ; the anterior si- 

 tuated laterally in about middle of the lateral side of prostomium ; 

 the posterior on dorsal side near posterior margin of prostomium. 

 Protruded proboscis with jaws as usual ; papillae on it not pre- 

 served. 



Parapodia long and slender ; ventral ramus conical, terminally 

 divided into pre-anl post-setal lobes, the former larger than the 

 latter ; Ijoth prolonged dorsally ; ventral surface of the ramus 

 studded with short-stalked, large, spherical papillae. Dorsal ramus 



