26 AET. II. — A. IZUKA : 



and with somewhat convex lateral margins. Ccratophores of 

 lateral tentacles a little longer than half the length of prostomium 

 proper, but a little shorter than the broad massive ceratopliore of 

 median tentacle. Anterior eyes placed in the middle of the 

 lateral margin of prostomium ; smaller posterior eyes near the 

 posterior border of same and nearer to the median line than the 

 anterior ones. Median tentacle a little longer than twice the 

 length of prostomium, and like the lateral ones provided with a 

 black subterminal bulb and a terminal filament. Lateral tentacles 

 longer than prostomium or half the length of median tentacle. 

 Subtentacles thick, densely covered with conical papillae, not so 

 long as the median tentacle, but twice as long as prostomium. 



Dorsal tentacular cirri longer than lateral tentacles, but 

 shorter than the median ; similar in colour and structure to the 

 tentacles. Tentacles, tentacular cirri and dorsal cirri are all en- 

 tirely smooth. 



Dorsal cirrus with the tip extending a little beyond that of 

 bristles ; ventral cirrus reaching to about the base of ventral 

 bundle of bristles. 



Dorsal bristles light yellowish, in length equal to about ^ that 

 of ventral bristles, tapering gradually from base to tip, finely 

 serrated. Ventral bristles dark yellow, about 17 in number, with 

 7 — 10 series of sj)ikes. 



Nephridial papillae may be found from the 8th segment. 



Elytra in 15 pairs borne on segments 2, 4, 5, 7 23, 



25, 27, 29 ; entirely covering the dorsum. They are roundish in 

 the anterior segments, oval more posteriorly, and finally kidney- 

 shaped. Their dorsal surface appears granulars ; the anterior 

 covered parts as well as the inner margin hyaline ; colour of the 

 remaining parts grayish with numerous patches of dark pigments, 



