LAETMONICE. , 81 



The dorsal felt is of uniform thickness, regular, tough and essentially 

 smooth throughout. 



Neuropodial setae not concealed by the felt but much shorter than in 

 A. echidna Mcintosh. They are all deep, almost blackish, brown in color, with 

 the tips of some appearing paler. Arranged m the usual three series, of which 

 the dorsal consists of two or occasionally of three, the middle mostly of five, 

 and the ventral of eight to twelve spines, in the type mostly toward the upper 

 limit, in the paratype, a much smaller specimen, toward the lower. The spines 

 of the dorsal series are stout, distally somewhat compressed and longitudinally 

 weakly sulcate down the middle of the flattened side, straight or shghtly curved 

 distally. Setae of middle series much more slender, commonly less than a half 

 or a third the diameter of the dorsals; evenly and obviously curved beyond 

 middle, pointed. The ventrals much more slender than the medians, more 

 strongly curved, commonly with a soft, flexible, pointed tip. 



No slender iridescent setae evident in the type, the lateral fibres all densely 

 coated with foreign material. The notopodials in two series. In both the 

 setae are in the form of stout straight spines, stouter than the dorsal neuro- 

 podials, those of the upper series greatly so. The spines are all straight, 

 pointed, and erect, rising distally free from the felt or often almost wholly 

 concealed. In each series usually three in number, of which one may be reduced 

 in size. 



Thirty-seven somites in type. 



Length, about 40 mm. Width to tips of setae 30 mm.; to bases of para- 

 podia ventrally, 16 mm. 



Locality. Off Aguja Point, Peru, 20 m. N. W. : Sta. 4654 (lat. 5° 46' S., 

 long. 81° 31' 9" W.). Depth 1,036 fms. Bottom, dark brown mud. Bottom 

 temp. 37.3° F. 12 November, 1904. One specimen. 



Laetmonice Kinberg. 



Ofvers. K. vet. akad. Forh., 1855, 12, p. 382; Malmgren, Ofvers. K. vet. akad. Forh., 1865, 22, p. 53; 



ibid., 1867, 24, p. 129, Levinsen, Ofvers. Nordiske Annulata, 1883, pt. 2, p. 26; Roule, Bull. Mus. 



hist, nat., 1898, 4, p. 191. 

 Laetmaionice Kinberg, Fregatt. Eugenies Resa. Zool. Annulater, 1857, p. 7; Baird, Jourii. Linn. 



soc. London. Zool., 1865, 8, p. 179; Quatrefages, Hist. nat. annelfe, 1865, 1, p. 199; Ehlehs, 



Mem. M. C. Z., 1887, p. 44; Daeboux, Bull. sci. France & Belgique, 1900, 30, p. 102; McIntosh, 



Brit, annelids, 1900, 1, pt. 2, p. 258. 

 Laetnionicella Roule, Bull. Mus. hist, nat., 1898, 4, p. 191. 



