106 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



the last 5 segments lack them, but on the eighth last segment there is a 

 recurved cirrus, followed by 2 segments where only a blunt base is 

 visible. 



The notopodial cirrus is unique for having a basal flattened lobe 

 which abruptly gives rise to the digitate cirrus; in this respect it differs 

 from the comparable part in Nephtys picta, where the basal part of the 

 notopodial cirrus is not so broadly expanded. 



Preacicular setae are barred and terminate in slender tips, as typical 

 of other species. Postacicular setae are of 2 kinds ; most are long, slender, 

 and smooth along the cutting edge. A few in the middle parts of the 

 fascicles have, at the lower part of the cutting edge, a few tooth-like 

 processes that resemble those of A r . picta (above) but are shorter, more 

 easily sloughed off, and apparently constricted at the base. 



Nephtys bucera may be separable from N. picta in the following 

 respects: the jaw pieces are dark brown in the first and amber colored 

 in the second ; acicular lobes are rounded to conical in the first and 

 slightly incised in the second; the notopodial cirrus has a basal broad 

 lobe in the first which is larger than that in the second. In N. picta 

 the toothed postacicular setae are coarsely and conspicuously dentate at 

 the basal end whereas in N. bucera the larger denticles are dehiscent. 



N. picta has dark transverse bars on the first few to 40 segments; 

 N. bucera lacks color pattern and is pale except for the red color caused 

 by the blood vessels. 



Distribution. — N. bucera Ehlers is known chiefly from New Eng- 

 land, and has been recorded south to North Carolina. 



Nephtys cornuta Berkeley 



Nephthys cornuta Berkeley, 1945, p. 328. 



Collection. — Friday Harbor, Washington (1, gift from Drs. E. and 

 C. Berkeley). 



This is a pale, small species. An ovigerous, presumably grown in- 

 dividual measures only 10.8 mm long and 2 mm wide with, 1 mm 

 without, parapodia at the widest or tenth segment. The ventral pro- 

 stomial antennae are deeply bifurcated. Interramal cirri are first present 

 from segment 5 and already large; they are continued back to near the 

 end of the body. The proboscis, seen only by dissection, terminates in 

 large papillae and the proximal surface is seemingly smooth; jaw pieces 

 are triangular, light brown, paired. 



