208 AET. II. — A. IZUKA *. 



Parapodium in ventral aspect half as long as the breadth of the 

 segment. Anterior lobe longer than the posterior, its end rounded ; 

 anterior end of posterior lobe conical. Dorsal cirrus cordate 

 with sharply pointed tip and broad base in anterior segments, but 

 in posterior parts of body its shape becomes lanceolate. Ventral 

 cirrus cordate, much smaller than the dorsal, with rounded tip ; 

 somewhat broader than high, but posteriorly it becomes lanceolate 

 like the dorsal cirrus. 



Bristles compound, about 32 in a bundle ; upper end of 

 shaft distinctly serrated, but without large spines ; setose end- 

 piece with distinct serration in basal parts. 



Habitat : — " South Japan " (Maeenzellee) ; Sagami Bay. 



Genus JVotopJii/llnni Oersted 



(non Schmarda). 



Body linear, gently tapering at both extremities ; dorsum 

 convex, ventral surface flattened and grooved. Two very large 

 eyes. Tentacles five : four anterior and one median. Tentacular 

 cirri on two segments, four on each side, the two anterior pairs 

 shorter than the two posterior pairs. Dorsal ramus of parapodium 

 little differentiated, still with an acicula and a few simple bristles 

 besides supporting a large irregularly reniform dorsal cirrus. The 

 series of dorsal cirri imbricate, almost covering the dorsum 

 and parapodia. Ventral ramus of parapodium has a much 

 smaller, vertical, and somewhat reniform lamellar cirrus, and also 

 an acicula together with numerous bristles, the shaft of which 

 is curved distally and ends in a dilatation provided with a series 

 of spikes that guard the base of tlie long sabre-shaped terminal 

 blade minutely serrated on the edge. The ventral border of 



