226 



ABT, II. A. OF JAPAN : 



Genus Amiyhinome Bruguière. 



"Body elongate. Prostomium with 3 tentacles, 4 eyes, and a 

 more or less folded caruncle which covers 2-3 segments ; sub- 

 tt ncles 2. Parapodium biramous, the rami very distinct, some- 

 tiuies with hairs. Branchiae arborescent, the branches and 

 branchlets very numerous. 



AmpJiinonie rostrata (Pallas). 

 PI. I, fig. 3 ; PL XXII, figs, ß— 9. 



1766. Aplirodita rostrata, Pallas. Misc. Zool., p. 106. 

 1885. Ampliinorae rostrata, McTntosli. " Challenger " Hep. Anuel., p. 

 21, PL I, fig. 7 ; PI. IV, fig. 1 ; PL Ia, fig. 16. 



By good fortune the anther found several living specimens of 

 the present species on a fl.oating timber on sea near the Misaki 

 Marine Laboratory, July 19th, 1905. 



In the living animals the entire body is of a bluish-black 

 colour, while the tentacles, cirri and branchiae are deep red. 

 When preserved in alcohol, the colour of body changes into a 

 peculiar slate-blue, and that of tentacles, cirri and branchiae into 

 a ferruginous hue. 



Body elongate and somewhat tetragonal in cross-section. 

 Measurements and number of body-segments in three large ex- 

 amples are as foUows : — 



Lfcngtli 



IVIaximnm breadth in- 

 cliKÜng parapodiii 



Maximum breadth ex- 

 cluding parapodia 



Number of segments 



113 mm. 



98 mm. 

 85 mm. 



14 mm. 

 11 mm. 

 10 mm. 



10 mm. 

 8 mm. 

 7 mm. 



54 

 53 

 53 



