1903.] NATURAL SCIEXCES OF PHILADELPHIA. 441 



that species, diverges sharply at an angle from the last one. The num- 

 ber of filaments developed on successive somites is as follows; 1 on \I, 

 2 on IX, 3 or 4 on X, 6 on XII, 7 on XIII, 8 on XIV, 9 on XVI or XVII, 

 10 on XXII, which number continues, with occasional variations to 

 9 or 11, to XXX; then through 9 and 8 to 7 at XL, 3 or 4 at XLII, 2 on 

 XL\', 1 on XLA^I and none from XL^''III caudad. 



Compound setae colorless, numerous, arranged irregularly with the 

 capillary setae on an area which is nearly circular on anterior and ellip- 

 tical on posterior somites, and near the dorsal border of which the 

 acicula protrude; terminal thickening of shaft short, but decided, 

 striated, dorsal margin very closeh^ and finely denticulated; appendix 

 very short, especially on the posterior feet, where its length is scarcelv 

 more than 3 times its width; tip bifid, the teeth widely separated; 

 guard very narrow, barely reaching beyond end of terminal tooth, its 

 edge finely denticulate. 



Capillary setae colorless, exposed for about H times length of com- 

 pound setae, nearly straight, tapering nearly regularly from base to 

 apex, dorsal margin minutely denticulated. Spatulate and pectinate 

 setae colorless, gently widened towartl end, terminated b}' only 7 or 8 

 points, one of the marginals being much prolonged and bent at an angle 

 to the plane of the others. 



Uncini absent from the anterior parapodia, j^ale yellow, 2 or 3, 

 passing obliquely through the foot and protruding from the ventral 

 side of its end, 1 usually considerably larger, form sigmoid, somewhat 

 enlarged at middle, terminated by one erect tooth and a larger 

 hooked one, guard broad. 



Mandibles with the carriers broad and short, scarcely exceeding the 

 jaw plate in length; the latter large, obliquely elongate ovate, widely 

 divergent, with 3 ridges and teeth besides the prominent but rather 

 blunt terminal ones. ^laxillae stout, strongly hooked, \\-ith short, 

 broad, unconstricted carriers. Posterior dorsal jaws triangular, toothed 

 along almost the entire medial margin, the left larger, with eight coarse 

 teeth, the right with 7 diminishing in size caudad. Two anterior 

 dorsal jaws on right, 3 on left side; the first minute with 1 tooth; the 

 next strongly curved, with a very br<iad thin plate, and 11 or 12 teeth 

 on each side; the asymmetrical left plate with 13 teeth. 



Totomi Sea, 3,730, 34 fms. 

 Eunice medicina sp. nov. (Pi. xxv, figs. 49, 50, 51.) 



The type, which is entire, but somewhat contracted, consists of 82 

 somites and measures 32 mm. in length and 1.5 mm. in greatest breadth. 

 It is probably immature. A second incomplete example is somewhat 



