^50 ART. II. — A. IZÜKA : 



conical (fig. 13) or oval- shaped ; basal region of jaws somewhat 

 triangular with a long rod-like prolongation. 



Habitat : — Chepissani in Sakhalin Island (Prof. I. Ijima). 



Genus Memipodus Qtrfg. 



Prostomium many-ringed ; segments 3 -ringed ; parapodium 

 uniramous, with a long anterior and a round posterior ligula ; 

 bristles compound ; branchiae absent. Proboscis short, more or 

 less barrel- shaped, with 4 similar jaws ; jaw gland present. 



Hemipodits yenonrensis n. sp. 



PL XXIII, figs. 14—15. 



This species was collected by myself first at Nagahama 

 in the Gulf of Yenoura, Prov. Suruga, on January 8th, 1898 ; 

 and afterwards it has become known to me that it exists also 

 in Misaki and in Ujina. 



Colour in living specimens yellowish white, with light brownish 

 pigments at tip of parapodia. Specimens preserved in alcohol 

 appear yellowish brown. 



Body consisting of 140 — 150 segments, 45 — 60 mm. long ; 

 maximum breadth 2.5 mm. excluding parapodia and 3.5 mm. 

 including them. 



Prostomium conical, 15 -ringed, the length about twice the 

 width at basal part. The 4 tentacles long, about one -half 'the 

 length of prostomium, indistinctly divided into 8 or 9 rings. 

 Segments 3 -ringed. 



Parapodium short ; its anterior ligula may be divided into a 

 broad proximal and a lanceolate distal portion (fig. 14) ; posterior 



