42 



AET. II.— A. IZUKA 



lying at the posterior border and nearer each other than the 

 anterior pair, each of which occupies the lateral prominence at about 

 the middle of prostomium. A well-marked median 

 groove divides the broad prostomium into two lateral 

 halves. Median tentacle small, subulate ; lateral ten- 

 tacles somewhat shorter, but the ceratophore slightly 

 longer than that of the median tentacle. Subtentacles 

 small, situated inferiorly, and external to lateral 

 tentacle, shorter than tlie median tentacle, smootli, 

 nearly cylindrical except at the blunt conical 

 extremity, wliich has a few brownish pigment just 

 above the distal narrowing. 



Tentacular and dorsal cirri simple, smooth, 

 filiform. Cirriphore or dorsal cirri greatly enlarged, 

 forming a tumid mass. Ventral cirri very short, 

 subulate, not reaching tip of parapodium. 



Proboscis with 9 papillae on each lip. Two elon- 

 gate papillao on each side at about the middle of pro- 

 truded proboscis. Jaws amber-coloured, slender, sharp. 



Elytra in 12 pairs, pale, rather thick, friable, 

 without any cilia or processes, beautifully though not 

 regularly reticulated, the margin alone granular. 



Farapodia in about 23 pairs, their fleshy part 

 largely developed. Dorsal ramus a soft, conical and 

 minutely granular elevation, wholly devoid of bristles. 



Ventral ramus much developed, forming a long, 

 sliglitly tapering process with bifid tip ; bearing one 

 Ventral bristle of q^ two loug, stifl", light amber- colourcd bristles. 



Folynoëlla levisetosa 



[After Mcintosh.] Tip of most bristlcs slightly bent from injury, 



' ' thence proximally the bristle gradually thickens to 



