470 



PROCEEDINGS OF THE NATIONAL MUSEUM 



NEREIS (NEREIS) PSEUDONEANTHES, new species 



FiGUKE 47 



VOL. 83 



Descynption. — Prostomium with a broad flat dorsal surface, much 

 as in N. eucapitis but with palpi conical and much less elongated, 

 tapering gradually distally. 



Parapodia (fig. 47, h, c) strikingly like those of N. vexiUosa 

 Grube; setae also much as in vexiUosa/ posterior notosetae as in 

 figure 47, c. 



Figure 47. — Nereis {Nereis) pseudoneanthes, new species : a. Anterior end in dorsal 

 view, with proboscis extruded and witli prostomium puslied back and seen from 

 anterior end, X 11 ; 6, tenth parapodium iu posterior view, X 39 ; c, posterior para- 

 podium in posterior view, X 39 ; d, a falcigerous homogomph notoseta, X 333. 



Paragnaths (fig. 47, a) : Area I with two small cones in tandem; 

 II with an elongated patch of eight low pale-brown cones ; III with 

 three transverse rows of small teeth in an oval patch, teeth low, 

 almost platelike; IV with about three rows of platelike teeth in a 

 wide-open crescent (this area with the greatest number of teeth on 

 the maxillary ring) ; V with a patch of 15 to 20 irregularly spaced, 

 low, chitinous, platelike teeth of various sizes, almost filling space 

 between V-VI (fig, 47, a) ; VI with four high, pointed, brown cones 

 disposed in a diamond ; VII-VIII with a single row of tiny, pointed, 

 brown cones, a continuous band of four irregular rows of teeth as 

 large as those of VI, and an oval patch of about 30 tiny teeth on 

 the maxillary side of VII. 



Jaws horny brown, with two or three denticulations and one to 

 three weak crenulations. 



Holotype.—U.S.^M. no. 20199. 



Localities. — San Pedro and La Jolla, Calif. 



