69 



with high power the total surface of the scale appears to be covered with small tubercles and 

 the brown-pigment to be distributed over a net with small meshes. The parapodia are almost 

 entirely constituted by the large neuropodial lobe (PI. XIV, fig. i6) ; this is provided with an obtuse 

 conical posterior lip, whereas the anterior lip by an incision near the tip of the acicula is divided 

 in a laro-e trapezoidal ventral part and a papilliform dorsal one. lts bristles are long, with a 

 short subterminal dilated part, with a tooth-like secondary process beneath the tip and about 

 ten indistinct denticulated rows; in the dorsal part of this fascicle there are some bristles, that 

 have the subterminal part slightly dilated, with several laciniated fringes but without a tooth 

 beneath the acute tip. The notopodial lobe is rudimentary, conical, containing only a few short, 

 straight setae, that are provided with spirally arranged laciniated rows and have a smooth tip. 

 The dorsal cirri are brown, with a colourless filiform tip and a dark subterminal dilatation ; they 

 do not extend to the distal extremity of the neuropodial fascicle. The ventral cirri, also brown 

 at the base, with a whitish filiform tip, are short and only reach to the origin of the fascicle. 

 The species is characterized by the conspicuous appearance of its elytra and by the 

 structure of its parapodia. 



4. Lepidoiiotus carinatits Potts. 



POTTS, loc. cit. p. 334, PI. XVIII, fig. I. 



Stat. 53. Bay of Nangamessi, Sumba. Depth up to 36 M. 2 specimen.s. 

 ? Stat. 99. 6° 7'. 5 Lat. N., 120° 26' Long. E. Anchorage of North Ubian. Depth 16 — 23 M. 

 I specimen. 



This nice little Polynoïd was first found on the reef of Praslin Island (Seychelles) and 

 described by Potts. The largest of the Siboga-specimens has a length of 22 mm. It is a true 

 Lepidonotus, with 1 2 pairs of elytra, that are elliptical of shape and have a smooth margin ; its 

 dorsum shows a dark median stripe, as the median border of each elytron is coloured by 

 black pigment, that is somewhat spread over the anterior and posterior margin. There are 

 two longitudinal keels on the posterior half of each elytron, distinguished from those of 

 Halosydna fulvovittata^ that they are already visible with low power; examined with high 

 power, each keel proves to be beset with a row of keeled tubercles. The remaining surface of 

 the elytron is densely covered with flattened tubercles: (i) smaller ones, with a strongly re- 

 fringent point in the centre, and (2) larger ones with a keeled tubercle on the tip, both whitish 

 between the net of black pigment cells. The dorsal setae, with very slender tips, are in their 

 distal half only provided with fringes ; the ventral bristles, with a small spur beneath the apex, 

 have but a small number (8 to 10) of spinous rows. The aciculae are of a brown colour. 



It may be suggested, that Polynoë {Lepid.) quadricarinata Gr. ^) from the Red sea will 

 prove to be identical with Lepid. carinatiis. 



5. Lepidonotus carimilatus Gr. PI. XV, fig. 10. 



GruBE, Annulata Semperiana, 1S78, p. 26, PI. III, fig. 2. 



l) Beschreib. einiger von Georg Ritter von Frauenfeld ges. Anneliden des Rothea Meeres, p. 2. 

 SIBür,.\-EXPEDITIE XXIV'^. 



