ANNELIDA FROM BERMUDA. 319 



The goiieral color of the body (in alcoliol) is yellowisli-whitc ; beauti- 

 fully irridesceut. 



Body strongly convex above ; tlattened below. 



Length (about), 110"'"'. 



Greatest width, 4'"°'. 



There is a gratlual diniiuutiun of diameter along the posterior third. 



Eunice violacea Gruhe. 



Eunice violacca, Gruhc. Auuulata Orstt'diaiia p. 57. 1856. 



Eunice violacea Quatrefagcs. Hist. Nat. dcs Annel., vol. i, p. 320. 1805. 



Eunice lioufisoi Ehlers. Die Borstenwiirnicr, p. 309. 1868. 



Ehlers' identihcation of E. violacea Grube with U. Eoussa^i Quatr. 

 seems at best very doubtful. In the former, the branchiae appear on the 

 sixth segment; in the latter, on the tenth, and both descriptions seem 

 to have been made from adult forms. Our material is hardly sufficient 

 to decide the question positively. 



MARPHYSA QiMtrefages. 



Maephysa aciculaeum n. q). 



(Plate X, Figs. .50-53.) 



Head broad, distinctly bi-lobed; lobes very broadly rounded in front; 

 anteniia3 smooth, tapering but little; median and median ])air about 

 three times as long as the head ; lateral pair a little shorter than the 

 last ; eyes two, black, between the bases of the paired autenujie. 



Buccal segment double the length of the following segment ; second 

 segment a tritie shorter than the third. 



Dorsal cirri (Figs. 50-52) stout, conical, retaining about the same length 

 throughout; ventral cirri on the anterior half of the body borne on a 

 stout cylindrical process, which becomes smaller on the posterior j)art 

 of the body. 



The branchiae begin (on adult specimens) on the twentj'-fifth to twenty- 

 ninth setigerous segment, at first as a single filament, shorter than the 

 dorsal cirrus. The filaments soon increase in number to four (Fig. 51'), 

 but on the posterior segments become again reduced to one very minute 

 filament. 



The superior (capillary) set?e are about double the length of the in- 

 ferior, and of the ordinary form. The form of the inferior sette is shown 

 in Fig. 53. 



There are from three to five sharp, black aciculae in each foot, scarcely 

 projecting. 



