222 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXV 



The setie of the first setigerous segment are about four times the 

 body diameter, those of the second two-thirds and of the third 

 one-half as long. Ventral setae much shorter. 



Stations 4431, off Santa Rosa Island, 38-45 fathoms, mud and 

 coarse gray sand; 4574, off Cape Colnett, lat. 30° 35' N., long. 117° 

 23' W., 1400 fathoms. 



Stylaroides pluribranchiata sp. nov- 



The type is 30 mm. long with a maximum diameter including the 

 parapodia near the cephalic end of 2.8 mm. and has 40 setigerous 

 segments. First twelve segments uniform in diameter, very slightly 

 depressed, the others terete, tapering very gradually to the caudal 

 three or four segments which taper rapidly to the small pygidium. 



Prostomium retracted into the short, collar -like first setigerous 

 segment, only the tentacles (branchiae) and palpi showing. Tenta- 

 cles in a crowded mass filling the opening of the cephalic collar, 

 divided into a pair of groups of sixty or seventy each. All are 

 slender, smooth, finger-like and about double the length of the 

 first segment. Palpi project from ventral part of the mass of 

 tentacles, fitting a recess formed by the narrowed ventral margin 

 of the first setigerous somite. They are about twice as long as 

 the ventral tentacles, thick, stout, blunt, deeply grooved and 

 smooth, except for a cross-furrow here and there. 



Segments well marked throughout, only slightly less so anteriorly 

 than posteriorly. First setigerous segment fully as wide as those 

 following, forming a collar-like ring, prolonged and projecting at 

 the sides opposite to the parapodia, contracted ventrally to about 

 half this length and forming a sinus to accomodate the palpi. 

 Succeeding segments slightly shorter than the first and simple 

 rings separated by distinct but shallow furrows. After about XII, 

 they become gradually reduced in diameter but undergo little 

 change in length to about the caudal fourth. In this region, 

 while the furrows are no deeper, the segments appear more distinct 

 owing to the greater prominence of the parapodia. 



Pygidium a minute ring, slightly oblique dorsad, with a whorl of 

 minute papillae surrounding the widely open anus. 



Integument rather thickly and uniformly studded throughout 

 with relatively coarse, rough papillae, arranged more or less regularly 

 in four transverse rows on each segment. They are of fairly 

 uniform size throughout and each consists of a conical base and 

 filamentous tip. Considerable fine sand adheres to the surface 

 between the papillae but is displaced rather easily. 



Parapodia consist of small flat notopodial and neuropodial 

 papillae, the former about three times the diameter and height of 



-This may belong to Saphobranchia which it resembles ''n the character of the 



setse. 



