12 ZOOLOGISCHE MEDEDEELINGEN — DEEL 7. 



already mentioned, that the colour of this worm is very variable, but 

 Potts ') first observed, that this is due to its association as a commensal 

 with holothurians, the colour of which it matches. 



Lepidasthenia Malmgren 2 ). 



Body elongate. Elytra numerous, minute, leaving the greater part of 

 the dorsum naked, inserted on segments 2, 4, 5, 7 . . . . 23, 26, 29 to 

 the end. Notopodial fascicle absent or rudimentary ; in neuropodial fas- 

 cicle sometimes upper setae enlarged or slender. 



Lepiclasthenia microlepis Potts 3 ). 



Siboga-expedition, Stat. 60, Haingsisi, Samau-island, shore-exploration. 



This species is characterized by the rudimentary feature of its elytra, 

 only just capping the elytrophores, with exception of the first pair, that 

 covers the head; they are edged with a chocolate pigment, that extends 

 over their underside. It is first mentioned by Potts from the Maldives. 



Lepidasthenia sibogae Horst 4 ). 



Siboga-expedition, Stat. 282, off the North East point of Timor; Stat. 

 306, Lobetobi-strait. 



At Stat. 306 the posterior fragment of a worm was found, consisting 

 of 22 segments, that is not quite colourless as the specimen from Stat. 

 282, but each of its segments shows on the dorsum two narrow trans- 

 verse brown bands, one behind the anterior margin and another in front 

 of the posterior border. 



II. Harmothomae. 



Harmothoë Kinberg 5 ). 



Body short, consisting of 35 — 37 segments. Scales 15 pairs, covering 

 the whole dorsum, inserted to segments 2, 4, 5, 7 . . . . 23, 26, 29, 32. 

 Antennae and cirri sometimes densely covered with cilia. Neuropodial 

 bristles stouter than notopodial ones, with spinous distal region and 

 simple or bifid tip. 



1) Loc. cit. p. 341. 



2) Annulata Polychaeta Spetsbergiae etc. 1867, p. 15. 



3) Loc. cit. p. 343, PI. 19, fig. 17, PL 21, fig. 52. 



4) Notes from the Leyden Museum, Vol. XXXV, 1912/13, p. 161. 



5) Loc. cit. p. 21. 



