234 AEÏ. II.— A. IZÜKA : 



Dorsal ramus about J the lengtli of the ventral, broadly attached, 

 and not constricted at base ; its terminal parts presenting a some- 

 what triangular outline, one corner of which is directed laterally. 

 Dorsal cirrus broad and leaf -like, arising from the middle of 

 the dorsal border of parapodium, with tip directed dorso- 

 laterally. Dorsal bristles are represented by only two short 

 stout spines (fig. 4). 



Proboscis large, measuring 21 mm. in lengtli and 2 mm. in 

 maximum breadth near the anterior end in fally protruded 

 condition. There are many slight longitudinal folds running 

 fi'om bn se to tip of proboscis ; and on each side of the 

 latter near the buccal segment there are found some 19 Y- 

 shaped black paragnathi (longitudinal series of accessory jaws), 

 the angle of each V being pointed towards the buccal segment. 



Jaws black, opaque, forming a continuous ring just inside a 

 circle of 10 obtuse lobes at the extreme end of fully protruded 

 proboscis. One principal jaw on each side, the right one bearing 

 2 large hooked spines of diffèrent length ; the left bearing in 

 addition 2 smaller spines. In the dorsal interval between the 

 two principal jaws are 16 smaller accessory jaws, each bearing a 

 pair of hooked teeth ; and in the ventral interval between same 

 there are 11 smaller 2-toothed jaws. Papillse somewhat heart-shaped 

 and leaf-like, sparsely distributed in regular rows. 



General colour of body brownish, lighter anteriorly and 

 deeper posteriorly ; in the dor so -lateral corner of each segment, 

 as well as on tips of parapodia, there is developed deep- 

 brownish pigment, which is especially conspicuous on segments 

 of the posterior region. 



Habitat : — Misaki (!) ; Naruto in Prov. Awa (!). 



