74 AET. II. — A. IZUKA I 



a". Eyes pedunculate ; dorsum covered with thin felt ; ventral bristles 

 semi-pinnate Laetmatonice. 



Genus Aphrodita L. 



Eyes sessile ; tlie fifteen pairs of elytra are concealed by a 

 thick felt of matted simple hairs ; ventral setae simple, not barbed 

 or toothed. 



Aphrodita japoïiiea Marenz. 



PL IX, figs. 1—3. 



1897. Aphrodita japonica, Marenzeller. Siidjap. Annel. I, p. 3, Taf. T, 



fig. 2. 

 1903. Aphrodita japonica, Moore. Proc. Acad. Nat. Sei. Philad. Vol. 



LV, p. 420. 



Of the four examples placed at my disposal, the largest 

 measures 7(S mm. in length, and 30 mm. in breadth including 

 parapodia, consisting of 42 parapodiated segments ; and the small- 

 est 28 mm. in length, 14th in breadth, with 36 segments ; dorso- 

 ventral thickness 20 mm. and 9 mm. respectively. 



Dorsum entirely covered by a thick felt of darkgray colour ; 

 and among; wliich the strong dorsal setae are almost hidden. 



Elytra in 15 pairs, hidden beneath the dorsal felt, and they 

 are imbricated in the median line. Outer and liinder parts of 

 elytra provided with short rounded papillae. 



Dorsal surface of body very finely granulated, and the ventral 

 surface also provided w^ith granules, 



Prostomium ovate ; its greatest width, which lies nearer to the 

 anterior border than to the posterior, about equal to the length, 

 and posteriorly it tapers to a width of about one -third of the 

 maximum. Two minute but distinct eyes on each side, of which 



