1903.] NATURAL SCIENCES OF PHILADELPHIA. 405 



podia ; styles formed like the palpi but more slender, reaching scarcely 

 beyond the tip of the nem'opodia. Ventral cirri with short globular 

 cirrophores placed about opposite to the notopodia; styles thickened 

 basally but with filiform distal halves, and their tips just reaching the 

 ventralmost neuropodial setre. First ventral cirrus closely approach- 

 ing the tentacular cirri in length. 



Elytra 29 pairs, on II, IV, Y, then on alternating somites to XXI, 

 then on XXII, XXIV, XX^'II, XXX. XXXI and again on alternating 

 somites to LVII; all are in symmetrical pairs, and are easily detached, 

 which is the condition of most of them. The first is nearly circular, 

 the last somewhat triangular, the others broadly ovate with a sKght 

 excentric posterolateral attachment. They are thin, smooth, color- 

 less and translucent; with a very distinct nerve ramifying from the 

 rear of attachment in dendritic fashion throughout the scale ; there are 

 no cilia nor papillae, but numerous pellucid dots are scattered over the 

 surface, in the center of each of which a small sense-organ appears. 



Notopodial setae few and irregularly arranged; they are short, reach- 

 ing only half-way from their points of origin to the end of the neuro- 

 podium, slender, rather strongly curved, pointed and with transverse 

 rows of excessively fine teeth along the convex border and half way or 

 more around the seta. Neuropodial setae arranged in a single vertical 

 series which spreads in a broad fan-shaped figure, slightly separated 

 into dorsal and ventral halves, slender and very long, probably quite 

 equalling the parapodium when fully protruded, somewhat enlarged and 

 bent below the slender, tapering, very finely serrulate, slightly hooked 

 and undivided end ; at the region of the thickening is a half ring of long, 

 fine, comb-like teeth supported on a slight shoulder, which is placed on 

 the ventral side of the setae in the dorsal half of the bundle and the dorsal 

 side of those in the ventral half. The most ventral setae have shorter, 

 stouter and more strongly hooked tips. Both notopodial and neuropo- 

 dial setae are colorless and beautifully transparent. The setae of the 

 first setigerous foot differs in no appreciable respect from the others. 



Only the type knoTvm from Sta. 3,703, Sagami Bay, 31 fms. 

 Lepidonotus cMtoniforinis sp- nov. (PI. XXIII, figs. 10, 11.) 



Form short and broad, with a regular elliptical outline, depressed; 

 the greatest width, whether measured between the tips of the setae or 

 the margins of the body, at the middle. The type measures 37 mm. 

 long, 16 mm. wide, and 6 mm. deep. 



Prostomium roughly square, the anterior and lateral margins 

 slightly convex, the posterior concave; a pair of prominent posterior 

 lateral ocular lobes, and the production of the anterior face into the 



