ZOOL— Vol. I.] JOHNSON— PACIFIC COAST ANNELIDS. 159 



Euphrosyne arctia, sp. nov. 

 Plate V, Figs. 5-7. 



Smaller than the preceding; diminishing slightly at posterior extremity, 

 nearly as broad at anterior end as at middle somite. Median bare stripe 

 about one-fourth width of body. 



Caruncle proportionally large and high, reaching posterior edge of fifth 

 somite; slightly bilobed dorsoventrally, the two lobes of equal length. Me- 

 dian tentacle short, less than one-half the length of the caruncle, with filiform 

 tip. Two eye-spots at its base. 



Preoral pads large, completely fused, and in preserved specimen covering 

 the ventral eye-spots. Mouth set far back, its posterior border formed by 

 fifth somite. The prostomium bears near its ventro-anterior edge the two 

 small tentacles, which are probably homologous with the antennae of related 

 forms. 



Setae of dorsal rami of two kinds: simple bifid and ringent (fig. 6); the 

 latter longer and stouter than those of E. aurantiaca. 



Ventral setae more slender than first type of dorsal, which they resemble ; 

 dorsal with a smaller, more divergent spike (fig. 7. two sizes). 



Five " branchiae " on each side, dichotomously branched four times (fig. 5). 

 Latero-dorsal cirrus between second and third branchial trunks. 



Number of somites 22. Buccal somites 1-5. Colors in life ochraceous; 

 rose-red on bare dorsal stripe; the setae, as usual in this genus, silvery white. 



A single specimen of this pretty little Annelid was brought 

 up on a stone from a depth of about ioo fathoms in Monterey 

 Bay, in July, 1896. This individual proved to be a female, 

 and its body-cavity was crowded with nearly mature eggs. 



This form comes nearest to Euphrosyne armadillo Sars. 

 From Ehlers' brief diagnosis of E. armadillo, in the 

 " Borstenwurmer." I am unable to determine whether the 

 Californian species is identical with the Norwegian. I have 

 not seen Sars' description of the latter and must therefore 

 defer passing judgment upon the specific distinctness of E. 

 arctia. 



Family II. AMPHINOMID^. 



Eurythoe calif ornica, sp. nov. 



Plate V, Figs. 8-14. 



Body long and rather slender, gradually tapered in its posterior third. An- 

 terior end very slightly tapered; head about one-half the greatest diameter of 

 the body. Cross-section of body squarish, dorsum nearly flat (except when 

 distended with the genital products); ventral contour decidedly convex, 

 sides between the rami flat and vertical. 



