NO. 1 HARTMAN : GONIADIDAE, GLYCERIDAE, NEPHTYIDAE 105 



The specimens listed above agree in these respects, except for 6 

 smaller ones, from protected sandy beaches at Beaufort, North Carolina. 

 In these the interramal cirri are first present from the third, instead of 

 fourth segment. They are referred to N. picta especially because the 

 postacicular setae include some with the characteristic large denticles. 



Distribution. — This species occurs along intertidal shores of eastern 

 United States from New England to Florida and in the Gulf of Mexico ; 

 it is associated with a substratum of shifting sands. 



Nephtys bucera Ehlers 



Nephthys bucera Ehlers, 1868, pp. 617-619, pi. 23, fig. 8. 



Material examined. — Type specimen of Nephthys bucera Ehlers, no. 

 209 in the Museum of Comparative Zoology, Cambridge, Massachusetts. 



Except for its pale color, this so closely resembles Nephtys picta 

 (above) that it is at first separable with difficulty. Mcintosh (1900b, p. 

 266) had considered the 2 identical but this view was challenged (Hart- 

 man, 1945, p. 23). 



The prostomium is approximately rectangular, with the frontal 

 margin widest and spatulate; the anterior antennae are prolongations 

 of the anteroectal margins and project obliquely forward. The posterior 

 antennae are easily overlooked since they are far back and lie under the 

 prostomium; they are inserted in the crotch where the prostomial lobe 

 and first neuropodium join. 



The proboscis has 20 terminal bifid papillae, the 10 of a side separ- 

 ated from each other by middorsal and midventral papillae. There are 

 22 rows of subterminal papillae with 6 to 8 in a row, but in irregular 

 arrangement. A very long middorsal one extends forward from the most 

 distal row. The proximal surface of the proboscis is smooth. Within there 

 are 2 dark brown triangular jaws. 



The first parapodium resembles very nearly that in Nephtys picta 

 (above). The neuropodium is enlarged as a broad, flat lobe and contin- 

 uous with a digitate ventral cirrus; it carries a fascicle of slender pre- 

 acicular setae that project forward at the sides of the prostomium; the 

 notopodium consists of an acicular lobe only with a crescentic fascicle of 

 preacicular setae and a few postacicular setae. Acicular lobes are broad- 

 ly rounded in anterior and median segments and come to be more or less 

 conical in back. 



Interramal cirri are first present from the fourth segment and re- 

 curved from the fifth; they are present through most body segments, 



