ERRANTIATE POLYCHAETA OF JAPAN. 217 



ramus sinuous provided witli a small terminal and a short 

 inferior lamella, with a small papilla at the inner superior border 

 of the terminal lamella. Ventral cirrus large and conical. Com- 

 pound bristles brownish, comparatively short, distinctly curved in 

 the dilated parts beyond the shaft, with serrated edge. Barred 

 bristles tapering to fine tip. 



Rcmarlis : — Typical parapodium of the species is distinguished 

 from that of Nephthys caeca (0. F. Müller) by the fact that the 

 dorsal lamella is smaller and more rounded, its greatest vertical 

 diameter being nearly in the middle and its long axis being 

 directed dorsally (upwards) instead of obliquely outwards as in 

 N. caeca. In fact, the weaker development of the lamella in 

 N. ciliata suffices to at once distinguish that species from N. caeca. 



Habitat :— Misaki (!) ; " North Japan, 57 fathoms " (" Alba- 

 tross "). 



JS^ephthj/s b t 'a chyc ephala Moore . 



1903. Nephtliys bracliyceplialaj Moore. Pros. Acad. Nat. Sc. Philad., 

 Vol. LV, p. 431. 



This species was described by Mooee from an incomplete 

 specimen having 60 segments and a length of 64 mm. I have 

 not obtained a specimen tliat could be identified with this species. 

 I take the following from his description. 



Body relatively slender, not depressed, anteriorly slightly 

 arched, bat flattened on ventral surface ; posteriorly nearly quad- 

 rate in section. Maximum breadth including parapodia 4 mm. at 

 about 10th segment. 



Prostoniiinn very shoi'f, twice wider than long, deeply sunk 

 into peristomiuTii, roughly ol)long ; lateral margins slightly convex, 

 anterior margin gently concave, and posterior margin straight. 



