ANiNELIDA FROM liERMUDA. 317 



The lower acicula (Fij(. 45) is curved externally, and has two sharp, 

 triangular, teeth, of which the lower is verj- large. 



Body slightly convex above, flattened below ; segments numerous, 

 short; on the largest specimen, at the widest part of the body, there 

 were four segments, in a length of 1""'". 



Anal cirri lost on all our specimens. Color in alcohol, uniform yellow- 

 ish-white. 



Length of longest complete specimen, GO""". 



Width, a™'". 



Another specimen, posterior part lost, had a width of i™'". 



The specific name is given in reference to the denticles on the stem of 

 the compound setae. 



Eunice longisetis n. sp. 



(Plate X, P^igs. 46, 40 a, b-i9.) 



Head four-lobed, upper lobes small ; antennre smooth, median and 

 median lateral reaching back to the fifth segment ; lateral about one- 

 half as long as the median. 



The dorsal cirri are long and stout (Figs. 46, 46fl, b,) on the branchi- 

 ated segments, arising just at the base of the branchial stem. 



Ventral cirri stout, reaching beyond the foot. Branchia) begin on the 

 sixth setigerous segment, at first as a single filament, delicate, shorter 

 than the dorsal cirrus; further back the number of filaments increases 

 to eight, carried on the side of a stout stem, which is nearly double the 

 length of the dorsal cirri ; on the posterior segments they become re- 

 duced to the same condition as on the anterior, but persist to the end. 



The capillary setae are very long, reaching nearly to the end of the 

 dorsal cirri (Fig. 47); the compound setae are about one-half as long as 

 the capillary, terminal teeth sharp (Fig. 48), nearly at right angles to 

 each other. 



In the upper part of the foot .are two or three sharp aciculae, project- 

 ing slightly ; in the lower ])art, and extending into the ventral cirrus, 

 a single, curved, bi-deutate acicula (Fig. 49). 



Body convex above; flattened below ; anal segment short; anal c*irri 

 two, in all respects similar to the dorsal cirri. 



Color (in alcohol), dark reddish -brown. Fourth setigerous segment 

 white. Antenna?, tentacular cirri, and dorsal cirri evidently banded 

 with white and some other color in life, but with only slight traces oi 

 such marking remaining. Aciculae black. 



