228 AKT. II. — A. IZUKA : 



inner or dorsal side. BranchiaB continue to occur to the posterior 

 end of body, without decreasiug in size. 



Dorsal cirrus with cirriphore arising from the posterior part 

 of dorsal bristle-papilla. The cirriphore is bluish in colour ; the 

 style ferruginous and tapering towards the extremity, which ex- 

 tends nearly to tip of bristles. 



Yentral cirrus very short, but of a similar structure as the 

 dorsal. 



Dorsal bristles form a curved row with the convexity directed 

 forwards, and consist of two kinds, viz., stout bristles with grooved 

 and serrated tip (PI. XXIl, fig. 0) and longer ones with taperiiig 

 and curved tip (fig. 7). Yentral bristles few in number and 

 comparatively short, but strongly developed (fig. 8) ; the tip 

 strongly curved, and marked with a series of fine stria) in the 

 opaque or whitish parts. 



Acicula in both dorsal and ventral rami of parapodium 

 is peculiarly expanded at tip, the expansion differing in form 

 with dorsal and ventral aciculge. In the former it is of an 

 elongate shape, while in the latter it is larger though shorter 

 (fig. 9). 



Anus is a large elliptical opening, the maximum diameter of 

 which lies in the median line of body. It occupies several 

 segments at the posterior end of body. Internally, the mucous 

 membrane forms a prominent mass, occasionally showing ruga? 

 in somewhat radial arrangement. The large size of anus 

 may indicate certain peculiarity in the digestive function. In the 

 intestinal canal were found fragments of small crustaceans, gener- 

 ally mixed with some brownish -purple debris. Cirri and valves 

 of Lepas were also found among the contents. 



Habitat : — Off Misaki, on a large floating timber, on wliicli a 



