1911.] NATURAL SCIENCES OF PHILADELPHIA. 269 



delicate and inconspicuous asymmetrical pectinate setae with one 

 margin prolonged (fig. 73). The first five parapodia bear in the ante- 

 rior and ventral part of the fascicle a few larger seta? or hooded crochets 

 (fig. 72) with two accessory teeth below the principal hook and the 

 guards but little prolonged. Some of the larger ones show traces of 

 an articulation near the end. Parapodia succeeding these have the 

 crochets replaced by short setae with mucronate tips and narrow 

 limbae. These gradually disappear and no trace of them remains 

 at XXV. Somewhere between this point and somite L, the exact 

 segment undetermined, appear two stout yellow bidentate guarded 

 crochets (fig. 74) projecting slightly and obliquely from below the 

 acicula. 



The jaws are imperfectly chitinized, being soft and delicate and 

 except at a few thickened points, pale brown. Mandibles probably 

 abnormal, very small, the form of one half being shown in two pieces 

 in (PI. XVII, fig. 75). Maxillae (fig. 76) have long, acute, strongly 

 curved forceps jaws with nearly circular carriers. The two plates of 

 II on the left side have, respectively, six and seven teeth, on the right 

 side eight or nine teeth. Plate III of each side bears an unusually 

 large basal wing and six small teeth ; IV is small and bears a single 

 tooth. 



No color remains. ' This species is known only from the type and a 

 small portion of the middle region of another specimen from station 

 4,401. 



Stations 4,326, Soledad Hill, Point La Jolla, vicinity San Diego; 

 243-280 fathoms, soft green mud; 4,401, Lat. 32° 52' 40" N., Long. 

 118° 13' 40" W., 44S-468 fathoms, green mud and black sand. 



Onuphis nebulosa sp. nov. PI. XVII, figs. 58-68. 



This species has the anterior end slender with prominently out- 

 standing parapodia, the remainder of the body, so far as known, 

 depressed and of very uniform width and the small gills beginning on 

 VIII or IX. The type, consisting of the prostomium and 83 anterior 

 segments, is 25 mm. long and has a maximum width, exclusive of the 

 parapodia, of 1.3 mm. 



Prostomium about four-fifths as long as wide, elliptical with an 

 anterior median emaigination, strongly convex above. No eyes 

 detected. Frontal tentacles ovate, about One-third longer than wide 

 and about half as long as the prostomium, arising on the frontal border 

 of prostomium separated by a space of one-half their diameter and bent 

 strongly downward. Anterior paired tentacles arise from antero- 

 lateral border immediately behind frontal tentacles; their ceratophores 



