's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 7 



Lepidonotus malayanas n. sp. 



Siboga-expedition, Stat. 156, west off Waigeoe-island ; Stat. 262, west 

 off Great Kei-island. 



The head rounded, nearly as long as broad, with the eyes situated 

 close to each other in its posterior rhalf, like in Polunoë crinoidicola 

 Potts. ') À broad nuchal collar with two papillae. The scales are auri- 

 culate, with a conspicuous scar of attachment, lying eccentrically in its 

 posterior half, from which several branched nerve-stems are emerging; 

 their surface is smooth except a band along its border specially at the 

 outer side, that is covered with small knob-shaped papillae. The margin 

 is without cilia. The notopodial fascicle consists of a dozen of short, slightly 

 curved bristles, with a smooth blunt tip and faint, densely crowded, cir- 

 cular ridges; the neuropodial setae are about twice as long as the noto- 

 podial ones, with a dilated subterminal part, that shows faint transverse 

 rows and a distinct secondary process beneath the tooth-like tip. 



Thormora Baird. 2 ) 



This genus differs from Lepidonotus by its notopodial fascicle, con- 

 sisting of two kinds of setae : a ventral part of slender, smooth capillary 

 bristles with a sagittate distal end and a dorsal part of ordinary setae. 



Thormora trissochaeta (Grube). 3 ) 



Siboga-expedition, Stat. 99, anchorage off North-Oebian, Soeloe-islands ; 

 Stat. 231, Ambon-anchorage, reef; Stat. 240, Banda-anchorage ; Stat. 248, 

 anchorage off Roemah Loesi, Tioer-island, reef; Stat. 315, anchorage east 

 of Sailus Besar, Paternoster-islands. 



This species is very variable of colour, as already stated by Potts; 

 in the specimen from Ambon the elytra have a dark green pigment, like 

 in those from Tioer-island. The specimen from Banda has the scales red- 

 coloured, whereas spots of the same colour occur in the median dorsal 

 line in the intersegmental grooves. The specimens from North-Oebian show 

 purple spots. The elytra bear along their border small keeled tubercles, 

 that towards the centre acquire a conical shape, whereas some large 

 spines occur around the scar of attachment. That Thorm. trissochaeta (Gr.) 

 should be identical with Thorm. Jukesii Baird, as asserted by Augener 4 ), 

 I cannot accept, without having seen the typical specimens, for the elytra 



1) Potts, loc. cit , pi. XVIII, fig. 10. 



2) Journal Linnean Society, Vol. VIII, 1865, p. 199. 



3) Annulata Semperiana, p. 25, PI. II, fig. 4. 



4) Die Fauna Siidwest-Australieus, Bd. IV, 1913. p. 107 



