118 AET. II. A. IZUKA : 



tentacles long, reaching to 10th or 11th segment, and annulatcd 

 at wide intervals. Inner lateral tentacles about | as long as the 

 median, annnlated at short intervals ; the last feature more evident 

 in the outer lateral tentacles. 



Peristomium comparatively short. Tentacular cirri extend 

 considerably beyond its anterior margin. 



Branchiae are represented on each side by a minute process 

 on the Srd parapodium, and on the 10th by 6 filaments of 

 a moderate length. On the 20tli parapodium, the branchia has 

 8 filaments arising from a main stem at nearly equal distances. 

 On the oOth parapodium there are 7 filaments, on the 40th 3 ; 

 and finally on the 50tli no branchia. 



Setose bristles long, tapering to fine extremity, without 

 distinct wing but with flattened and serrated tip. Compound 

 bristles with a short terminal piece (fig. 12), the end of the 

 shaft somewhat enlarged, serrated along the convex side of the 

 curve. Posterior hook presents a single, large, strong fang with a 

 curved terminal process. 



Dental apparatus pale brownish, with several darker and 

 lighter colored bands. Maxillae moderately arched ; the left great 

 dental plate with 7 teeth, the right with 8 ; the left lateral paired 

 plate with 10 teeth, the left unpaired with 8, both sets of teeth 

 being comparatively small; the right lateral plate with about 12 

 small teeth. An accessory plate on the side of each paired 

 plate. 



Habitat : — Kanagawa in Prov. Musashi ; Misaki (!) ; " Off 

 Kobe, 8-58 fathoms " (" Challenger "). 



