Zool.— Vol. I.] JOHNSON— PACIFIC COAST ANNELIDS. 161 



Habitat. — San Pedro sand-flats, between tide-marks, 

 (July and December). Rocky shores at Pacific Grove, 

 near low-water mark (December). 



This species differs from Eurythoe pacifica Kinberg and 

 from its variety levukaensis M'Intosh in the following 

 points : 



(i) The bodyis more slender; (2) the tentacle is placed 

 between the posterior instead of the anterior pair of eyes ; 

 (3) the caruncle is much narrower, and extends only to the 

 third somite, instead of to the fourth. The bifid seta? are 

 likewise different in lacking the serrations near the tip. 



It is evidently distinct from Eurythoe comflanata Pallas 

 which, as its name indicates, is much flattened dor- 

 soventrally, while in E. californica the vertical and 

 horizontal diameters are nearly equal. A further distinc- 

 tion is seen in the tentacle, which is much shorter in E. com- 

 ■planata than in E . californica. 



Family III. PALMYRID^. 



Chrysopetalum occidentale, sp. nov. 

 Plate V, Figs. 15, 16; Plate VI, Figs 17-19. 



Form elongate, scarcely tapered anteriorly, and but little posteriorly, 

 slightly flattened dorsoventrally; segmentation clearly marked, prostomium 

 and parapodia prominent and distinct. Mouth set far back, bordered pos- 

 teriorly by fifth somite. 



Prostomium rounded above, its breadth greater than its length, bearing 

 the four eyes, of which the anterior pair are nearer together than the posterior, 

 and are sometimes fused into a large black patch. On its antero-ventral aspect 

 the prostomium carries the median cirrus, two antennae, and the palpi (fig. 

 15). The median cirrus is less than half the length of the antennae, stout, 

 conical, indistinctly jointed near its base. Antenna? swollen in their prox- 

 imal half, contracted at point of attachment, gradually tapered, their distal 

 half, like that of all the cirri, roughened with scattered spinulations. Palpi 

 short, decidedly less than antennae, thick, very slightly tapered, bluntly 

 rounded at tips, constricted at base. 



First somite bears on each side two pairs of peristomial cirri, not essen- 

 tially different from the rest of the dorsal and ventral cirri, each two jointed; 

 three on each side nearly equal in length, but ventral cirrus of posterior pair 

 decidedly shorter (PI. V, fig. 16). 



Second somite setigerous, with distinct, anteriorly directed parapodia, ex- 

 tending in front of prostomium. Dorsal setae, like those of all succeeding 



