's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 5 



nearly 25 mm. in length, whereas it breadth (with bristles) is about 

 1 mm. The elytra, overlapping each other in the median dorsal line, are 

 oval, with a smooth margin ; the free part of their surface is brownish- 

 red, whereas the covered area like the scar of attachment is whitish. 

 Behind the last one there occurs a group of large white spines, passing 

 into a band of obtuse, wart-like papillae, situated along the inner mar- 

 gin and visible with low power; examined with high power the total sur- 

 face of the scale appears to be covered with small tubercles and the 

 brown pigment to be distributed over a net with small meshes. The 

 tentacle and the lateral antennae are about of the same length, with a 

 white filiform tip and a subterminal dilatation. The eyes of each side lie 

 close to each other; the anterior of them are situated on the lateral pro- 

 minences of the head. The parapodia have the notopodial lobe rudimen- 

 tary, containing only a few short straight setae, provided with spirally 

 arranged laciniated rows and a smooth tip ; the large neuropodial lobe is 

 provided with an obtuse conical posterior lip, whereas the anterior lip 

 by an incision is divided in a large trapezoidal ventral part and a papil- 

 liform dorsal one. Its bristles are long, with a short subterminal dilated 

 part, 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. 



Lepidonotus carinatus Potts. *) 



Siboga-expedition, Stat. 53, bay of Nangamassi, Soemba. 



The largest specimen has a length of 22 mm. Its elytra are elliptical 

 of shape and have a smooth margin; their median border is coloured by 

 black pigment, producing on the dorsum a dark median stripe. There 

 are two longitudinal keels on the posterior half of each elytron, distin- 

 guished in that regard from those of .Halosydna falvovittata, 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 species was 

 first found on the reef of Praslin-island (Seychelles). 



Lepidonotus carinulatus Grube. 2 ) 



Siboga-expedition, Stat. 51, Madoera-bay in Molo-strait; Stat. 104, 

 Soeloe-harbour ; Stat. 213, Saleyer-anchorage, reef-exploration; Stat. 273, 

 anchorage of Poeloe-Jedan, east-coast of Aroe-islands. 



1) Potts, loc. cit., p. 834, PI. XVIII, fig. 1. 



2) Annulata semperiana, 1878, p. 26, PI. Ill, fig. 2. 



