EKKANTIATE POLYCHAETA OF JAPAN. 199 



bears two anal cirri. The animal is of a sandy or grayish-green 

 hue, more darkly pigmented on the edges of the lamellae. 



Proboscis in extrusion with six rows of large tubercles an- 

 teriorly and numerous rows of smaller conical papillao posteriorly. 



Dorsal cirri much developed superiorly, so as to be almost 

 rectangular ; ventral cirri ovate-elliptical, turned upwards in the 

 middle segments ; setigerous lobe bifid ; shaft of bristles with 

 enlarged spinigerous tip, the blade long and serrated. 



Habitat : — Suruga Bay, 63 — 75 fathoms (" Albatross ") ; and 

 Misaki (!). 



Genus Carohia Quatréfages. 



Prostomium with four tentacles, anteriormost segment free 

 from prostomium. Four pairs of tentacular cirri : three pairs 

 on first segment, or on first and second segments, and one pair 

 on the next following. 



Carohia castanea Marenz. 



PI. XXI, fig. 3. 



1879. Carobia castanea, Marenzeller. Südjap. Amiel., p. 19, Taf. Ill, 



Fig. 2. 

 1905. Carobia castanea, Willey. lîej^xjrt on the Peaii Oyster Fislieiy, 



Snppl. Kept. XXX, p, 262. 



Tliis species may be distinguished from other Japanese 

 Phyllodocidao ])y its deep red colour. 



Prostoniiuiu uu-hcd, as long as broad, with narrow anterior 

 border. Maximum breadth in tlie middle of prostomium. Behind 

 that line of greatest breadtli lies the anterior margin of a pair 

 of large, oval and black eyes. Both pairs of tentacles conical. 



