2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 9I 



of the parapodium. The neuropodium is irregularly ringed at the 

 base and narrows at a rather uniform rate to the apex. The bending 

 of the tip and breaking of the acicula is obviously an accident. A 

 slender ventral cirrus extends beyond the end of the setal portion. 

 Beginning with the third, the parapodia are very large, and the large 

 setae of the third parapodium extends as far as the tips of the palps. 

 In a parapodium from the middle of the body, the notopodium is 

 short and thick but narrows abruptly to an acute tip, from which 

 the acicula protrudes. The neuropodium is slender, longer than the 

 notopodium, and almost circular in cross-section, ending in a blunt 

 point. Just proximal to the end are two blunt lobes, and nearer the 

 body is a third. From each of these protrudes a stout seta. The 

 dorsal cirrus is very long and slender, but the ventral one hardly 

 reaches the end of the setal lobe. 



The elytra are large, entirely covering the dorsal surface of the 

 body, and most of them, if not all, overlap in the dorsal midline. 

 They are broadly oval in outline, with the elytrophore attachment 

 nearer one end, the long axis of the elytron being at right angles to 

 that of the body. The elytra are thin, with entire margins and no sur- 

 face markings. They are mostly translucent, this character being most 

 marked near the margins, for whitish deposits occur near the elytro- 

 phore attachment and extend for some distance outward. 



In a parapodium from near the middle of the body, the most 

 noticeable setae are those of the notopodium, which curve upward and 

 outward. The largest of these are very heavy and terminate in a point, 

 which has barbs on either side of the end of the shaft (fig. 5). These 

 did not appear in all somites, but this was probably due to accidental 

 causes. The remainder of the dorsal tuft is composed of slightly 

 smaller setae than the above, which end in sharp points and are faintly 

 bilimbate toward the ends. On the surface of their shafts are minute 

 points, giving it a shagreen appearance. A tuft of slender, colorless, 

 sharp-pointed setae lies on the antero-posterior face of the notopodium. 

 The neuropodial setae are very few and heavy (fig. 6). Toward the 

 ends they bend slightly and taper to an acute tip, which carries two 

 or three stout teeth on the outer surface. In the neuropodium is a 

 tuft of setae that have sharp lateral teeth along the shaft (fig. 4). 



Type. — U.S.N.M. no. 20031, collected at station loi in the Virgin 

 Islands at latitude i8°4o'3o" N., longitude 64°5o' W. — latitude 18° 

 45'4o" N., longitude 64°48' W., in 300 fathoms. 



