19 



but also the bristles were remarkably disorganized. So, f. i., a specimen of Chl. fiava in the 

 Leyden Museum, brought home from Japan by von Siebold, has lost all the dorsal spots. After 

 the addition of hydrochloric acid the dorsal bristles do not only show a strong development 

 of carbonic acid, proving that these setae contain a great deal of calcareous matter, but at 

 the end of the reaction they have lost all their serrations, that appear to consist only of carbonate 

 of lime Y ). Therefore I think it not improbable, that in the preserving fluid of old, during many 

 years preserved specimens, traces of an acid may have been developed, by the action of which 

 the serrations of the dorsal setae are totally dissolved. In the collections of the Leyden Museum 

 there is a specimen from the port of Singapore, that has been preserved for some time in 

 formaline and now possesses only smooth bristles. Also the Chloeia fiava , characterized by 

 Ouatrefages 3 ) "remus superus setis laevibus" may be explained in this manner. The serrated 

 bristles in the dorsal fascicle are commencinsr with the fifth sejjment. 



'& 



2. Chloeia fiava, var. pitlcJiclla Baird. PI. VII, fig. 3. 



? Chloeia pulchella Baird, Monograph of the Amphinomacea: Journ. of the Linnean Society, 

 Zoology, Vol. X, 1870, p. 234. 



Stat. 162. Between Loslos and Broken-islands. 2 specimens. 

 Stat. 258. Tual anchorage, Kei-islands. 1 specimen. 



With this name Mr. Baird has indicated a couple of Ch loe ia-specimens, found on the reefs 

 of the north-east coast of Australia and charakterized by "macula angusta nigra in medio 

 segmentorum". According to Mc Intosh (loc. cit. p. 9) they must be identified with Chl. fiava 

 and therefore they probably represent young individuals of this species. At the above-named 

 stations the "Siboga" collected three specimens, agreeing in so many regards with Baird's descrip- 

 tion, that, in my opinion, they must be identified with his species. The largest of the Siboga- 

 specimens has a length of 40 mm. and the number of its segments amounts to 32; the two 

 other specimens are about half as large. All have the dorsum strongly wrinkled and a dark 

 narrow oval spot on the middle of the posterior half of each segment (PI. VII, fig. 3), sometimes 

 surrounded by a white border; moreover there is a dark band running over the front side of 

 each parapodium. The dorsal cirri are dark coloured, especially in their basal part. There occurs 

 an undulated dark line over the middle of the caruncle; also the labial folds show a dusk hue. 

 The bristles are pale yellow and in their appearance they are so much agreeing with those 

 of Chl. fiava, that our specimens can only be considered to belong to a variety of that species. 

 The serrated bristles of the dorsal fascicle are also commencingf with the s th seement. 



3. Chloeia parva Baird. PI. VII, fig. 4; PI. VIII, figs. 1 — 3. 

 (Clil. mergiüensis Bedd.). 



BAIRD, loc. cit. p. 233, PI. IV, figs. Sa and b. 



Horst, loc. cit. 1S86, p. 167. 



BEDDARD, Journ. Linnean Soc. (Zoology), Vol. XXI, 1889, p. 258, PI. 21, figs. 2, 8 and 9. 



1) Already observed by Mc Intosh with the bristles of Chl. fucata (venusta Qtrf.): Trans. Zool. Soc. Vol. IX, 1877, p. 396. 



2) Hist. nat. des Annelés, p. 387. 



19 



