334 THE ANNELIDA POLYCHAETA. 



Parapodia lower on first few segments than on the following ones. Nearer 

 the ventral surface than to the more convex dorsal one. In general short and 

 cylindrical, those of the most anterior segments much reduced in length. With- 

 out cirri. No trace of a presetal process, but a distinct postsetal process present. 

 This cylindrical, slender, finger-like, and short, being considerably less than the 

 diameter of the parapodium. 



Acicula of neuropodium nonnally three in number, these stout, straight, 

 and tapering distad to an apex that is not fine, this acute but with its sides 

 convex. Of these acicula two are ordinarily deep black in color or paler only 

 at tips, the third fighter, more brownish. 



The ordinary setae distally become thin and blade-Uke, this region obliquely 

 finely striate and narrowing to a fine tip, this distal thin region gently doubly 

 curved, but not at all geniculate and not at all dentate at base. In each of the 

 posterior parapodia there is, in addition to the ordinary setae, a single stout 

 spine at apex narrowed in a short, distally rounded tip protected by membranous 

 guards, the latter short and roundetl; the protected tip in some cases appears 

 to be incised or narrowly divided. The setae are dark brown proximally and 

 pale distally. 



There are four well-developed pau-s of maxillary plates, none of which 

 bear true teeth. All are black throughout. The carriers of the first maxillae 

 with the posterior stems short; no posterior supports, or these rudimentary, if 

 present being short, thin and pale. Hooks of first maxillae longer than carriers, 

 stout and evenly curved. Second maxillae stout, heavy plates lying contiguously 

 between the hooks of I ; each presents ventrally two large, stout, rounded proc- 

 esses, one near middle and one toward anterior end. Plates of III and IV 

 without teeth or processes. None of the cotypes is complete posteriorly. 



Mandibles with masticatory plates very large, the stems short and slender, 

 shining white ventrally. 



Greatest width of type, exclusive of parapodia, 3.2 mm. 



Locality. Peru: 111 miles N. W. of Aguja Point. Sta. 4651 (lat. 5° 

 42' S., long. 83° W.) . Depth 2,222 fms. Bottom of fine, sticky, grey mud. Bot- 

 tom temp. 34.4° F. Several specimens, all incomplete. 11 November, 1904. 



Oenone Savigny. 



Descript. Egypte. Hist, nat., 1809 [ = 1822], 1, pt. 3, p. 14, 5.5; Ehlebs, Borgtenwiirmpr, 1868, p. 4o7; 

 Grube, Jahresb. Schlesch. gesellsch., 1879, 56, p. 83; Auoeneu, Fauna Sudw.-Austr. Polych. 1, 

 1913, 4, p. 290. 



