u 



AET. TI. E. IZUKA : 



bristles. Number of segments 20. Ventral sm^face smooth, with 

 nephridial papillae in segments 8-25. 



Prostominm slightly wider than long, tliough the continuation 

 of the peaks into the bases of lateral tentacles gives it a some- 

 what elongate appearance. Posterior pair of eyes near the hind 

 end of prostomial lateral surface ; each of them deep black, cir- 

 cular. Anterior pair of eyes larger, elliptical or crescentic, black, 

 situated on the widest part of prostomium. Total length of me- 

 dian tentacle about 5 times that of prostomium, J of the lengtli 

 being made up by the basal piece and f^ ^f same by the fila- 

 mentous tip ; style with a slight subterminal enlargement. 

 Lateral tentacles vary considerably in length, but are longer and 

 decidedly more slender, and the filiform tip longer than the me- 

 dian ; subterminal enlargement scarcely developed. Subtentacles 

 about 3 times the length of prostomium, thickened basally, taper- 

 ing toward the end, which bears a very short terminal fikiment. 



In typical parapodium (10th), the ventral ramus is large, 

 nearly truncate or slightly angulate at the point where the deep 

 brown aciculum protrudes ; ventral margin horizontal ; dorsal 

 margin sloping with a slight curve to the elytrophore. The dorsal 

 ramus a mere lobe on the antero-dorsal face of ventral ramus, 

 supported by a slender aciculum. 



Dorsal bristles forming a large diverging tuft, but their tip 

 scarcely extending beyond the end of ventral ramus, of a pale 

 hay colour, capillary, bipinnate, with alternating lateral processes. 

 Ventral bristles arranged in 3 supra-acicular and 5 subacicular 

 iiorizontal rows, amber -coloured, relatively slender, with unusually 

 long and smooth tip, which, with exception of the dorsaimost bristle, 

 exceeds Uw spinous portion in length ; 4 transverse rows of spikes 

 on the ventralmost bristle, on the dorsaimost. 



