ZOOLOGISCHE MEDEDEELINGEN — DEEL I. 



This widely-spread Lepidonotus, already found by Bedot near Ambon, 

 was met with by the Siboga on several Stations in the Malay-archipelago. 

 Marenzeller '), Willey 2 ) and Fauvel 3 ) rightly state, that the ventral spi- 

 nes are not „apice simplici", as mentioned by Grube, but obviously 

 „bidentate". 



Lepidonotus cristatus Grube. 4 ) 



This species, that was already niet with by Bedot near Amboina, was 

 dredged by the Siboga at seven different stations; moreover I could 

 state the presence in the Malay-Archipelago of- the two varieties Lep. 

 cristatus, var. echinata and var. ornata, first described by Potts from 

 Mauritius and Salomon (Chagos archipelago). 



Lepidonotus cristatus, var. echinata, Potts. 5 ) 



Siboga-expedition, Stat. 96, Soeloe-archipelago, South-east side of Pearl- 

 bank; Stat. 99, anchorage off North-Oebian ; Stat. 144, anchorage north 

 of Damar-island ; Stat. 154, north of Waigeoe-island ; Stat. 273, anchorage 

 off Poeloe-Jedan, east-coast of Aroe-island. Poeloe-weh, P. Buitendijk. 



In the specimens of Stat. 144 and 154 the two chitinous patches of 

 the elytra are rust-coloured. The worms of Stat. 96 and of Poeloe-weh 

 have a carmine colour and a dark spot, surrounded by a paler ring on 

 the midst of the elytra; the bilobed crest is faintly developed and con- 

 sists only of a couple of slight elevations, provided with a pair of white 

 tubercles. In variance with Mr. Potts I observed a conspicuous spur be- 

 neath the apex of nearly all ventral setae. 



Lepidonotus cristatus, var. ornata Potts. G ) 

 Siboga-expedition, Stat. 260, west off Great Kei-island. 

 A Lejndonotus-sipecimen, measuring 16 mm. in length and 8 mm. in 

 breadth, must be identified with the above-named variety of Potts, though 

 its characters are somewhat deviating from the description of that author; 

 f. i. the scales lack the large oval chitinous patches, described and figu- 

 red by Potts. They are densely covered with papillae, each bearing one, 

 two, three or a real crown of spinelets on their tip, all tinged with red. 



1) Sudjapanische Anneliden, III, 1902, p. 9, PI. I, fig. 4. 



2) Ceylon Pearl-oyster report, 1905, p. 248, pi. I, figs. 7— 11. 



3) Annél. polychètes du Golfe Persique, 1911, p. 367, fig. 1. 



4) Loc. cit. p. 27, PL II, fig. 3. 



5) Potts, loc. cit., p. 334, PI. XVIII, figs. 4 and 5. 



6) Ibidem, p. 333, PI. XVIII, figs 6 and 7. 



