346 PROCEEDINGS OF THE ACADEMY OF [June, 



projecting about one-fourth of their length beyond the neurocirri. 

 Stems colorless, of moderate length, nearly straight, little enlarged at 

 the distal end (PI. XVI, fig, 26) where they terminate in a small shoulder 

 and a socket bounded on each side by a fringe of long delicate teeth. 

 Appendages very delicate, about as long as depth of neuropodium 

 with barely discernible marginal teeth. 



Proboscis (only partially protruded) cylindrical, 5.5 mm. long and 

 .6 mm. in diameter, surface thickly covered with small, blunt, flattened, 

 slightly retrorse papillae, separated by considerably more than their 

 length. 



Color gray-blue or bluish-plumbeous with a metallic blue iridescence 

 and brownish suffusions and marked with a few conspicuous gradrate 

 black spots, especially on the ventral surface, either widely scattered 

 singly or aggregated in groups. Notocirri uniform orange yellow. 

 Neurocirri yellowish with dark brown or blackish margin. 



Station 4,454, Monterey Bay, May 12, 71 fathoms, green mud and 

 sand. 



Eulalia levicornuta sp. now PL XVI, figs. 27-30. 



Only one small specimen measuring 43 mm. long is complete, with 

 221 segments. The type is much larger, being 70 mm. long for 172 

 segments and lacking perhaps the caudal one-third and 100 segments; 

 its maximum width of body at C -CXX is 1.2 mm., between tips of 

 parapodia 1.8 mm. Another very much macerated and incomplete 

 specimen referred here somewhat doubtfully has 240 segments and is 

 94 mm. long, and less than 1 mm. wide, having therefore nearly the 

 proportions of a slender lumbriconereid. 



Form very slender and elongated, nearly linear, but tapering gently 

 both ways from about the end of the anterior third. 



Prostomium (PL XVI, fig. 27) about as wide as long, moderately 

 depressed, semiovate with truncate ends or subtriangular with rounded 

 basal angles and truncated apex, usually sharply differentiated from 

 the peristomium, but in one specimen almost continuous with it dor- 

 sally. Eyes one pair, small, about one-seventh of posterior width of 

 prostomium, close to its postero-lateral angles, separated by three to 

 three and one-half times their diameter, dark brown, with small lenses. 

 Frontal tentacles situated on the sides of a distinctly separated anterior 

 segment of the prostomium, subcorneal, their length about one-half 

 prostomium. Median tentacle a minute, slender, conical papilla 

 situated on line between anterior border of eyes and having a length 

 of from one to one and one-half times their diameter. 



Peristomium a complete ring entirely posterior to the prostomium 



