Zool.— Vol. I.] JOHNSON— PACIFIC COAST ANNELIDS. 187 



Sthenelais verruculosa, sp. nov. 



Plate IX, Figs. 62, 62a; Plate X, Figs. 65, 6$a-d. 



Body subcylindrical, slightly flattened on ventral side, entirely covered 

 dorsally and laterally, as low as the parapodia, by the strongly imbricating 

 elytra. Not tapered toward the head. Color of alcoholic specimen 

 fulvous; a median dark band on each elytron, just meeting the overlapping 

 edge of the preceding elytron. 



Prostomium rounded, broader than long. Eyes four, black; the larger, 

 posterior pair on dorsal side of prostomium, near insertion of basal joint of 

 tentacle. The smaller, anterior, forwardly directed pair under the bases of the 

 antennae. Tentacle smooth, two-jointed, terete, tapering gradually and 

 evenly to the point; about three times the length of the prostomium. An- 

 tennae (?) broad, expanded laterally at tips, hardly reaching beyond distal end 

 of basal joint of tentacle. Palpi elongated, smooth, terete, evenly tapered 

 from the thick base to the attenuated tip; when folded back reaching to the 

 tenth somite. 



Peristomial somite pushed far forward, concrescent around bases of palpi, 

 which appear to grow out from it. Its setae capillary, unjointed, much finer 

 than those of dorsal rami. Peristomial cirri four, dorsal pair much the longer, 

 reaching to tip of tentacle. Spoon-shaped organs present, their tips reaching 

 beyond the ends of the forwardly directed peristomial parapodia. 



Elytra (PI. IX, figs. 62, 62a) reniform, closely beset on dorsal surface with 

 numerous, minute, wart-like tubercles. Outer margin of elytra with a single 

 row of short, blunt, cylindrical papillae (fig. 62a). Elytra bent in a semicircle 

 around body; borne on alternate somites to twenty-seventh, thereafter on 

 every somite; the latter group of elytra narrower and more curved than the 

 former. 



Parapodia (PI. X, fig. 65) similar to those of S. fusca in general aspect; 

 branchiae arising from ventral edge of elytrophore, depressed, their tips touching 

 the dorsal ramus, constricted at base. Tips of ventral rami prolonged in 

 ramose structures, largest on second and third pairs, gradually reduced on 

 succeeding parapodia. Ventral cirri elongated on three most anterior 

 parapodia; the rest reaching to tip of ventral ramus, winged on side 

 next the ramus, slightly moniliform toward the point. Dorsal setae (fig. 65^) 

 very similar to those of preceding species. Ventral sete of three kinds: 

 (1) slender, articulated setae (fig. 65a), occupying the lowest place in the fas- 

 cicle; (2) stout articulated setae (fig. 656), inserted above the former; and (3) 

 simple, frilled setae (fig. 65c), gathered in a small fascicle on dorsal aspect of 

 ventral ramus. Three ciliated cushions, extremely like those of 5. fusca. 



Measurements. — Length, unknown; width, 3.3 mm. 



A single imperfect specimen was dredged on a sandy 

 bottom in ten fathoms off White's Point near San Pedro. 

 The fragment, which is well preserved, consists of about 

 forty somites of the anterior end. 



