ON THE GENUS CHLOEIA. 169 
NOTE XIII. 
ON THE GENUS CHLOEIA 
WITH SOME NEW SPECIES FROM THE 
MALAY-ARCHIPELAGO, PARTLY COLLECTED BY THE 
SIBOGA-EXPEDITION 
BY 
Dr. R. HORST. 
Our knowledge of the genus Chloeia, though containing 
Annelids that for the greatest part are obviously coloured 
and are living in shallow water, is very incomplete; for al- 
though about twenty species have been described, it is 
a fact that more than half this number is insufficiently 
characterized and based upon badly preserved specimens, 
having not only lost their distinct colour-markings, but the 
bristles of which were also disorganized. Although the 
great Annelidologist Grube in his description of Chl. egena') 
says: ,durch das lange Liegen in Weingeist mégen manche 
Veränderungen entstanden sein, es ist mir aber nicht wahr- 
scheinlich, dass die dunklen, so bestimmt umschriebenen 
ansehnlichen Flecken, welche bei Chl. flava auf der Mittel- 
linie des Riickens stehen, spurlos verschwunden sein sollten” 
etc., yet this really happens. So f.i., in a specimen of Chi. 
flava in our museum, brought home from Japan by von 
Siebold, the dorsal spots have totally disappeared and a couple 
of individuals of Chl. parva, preserved only for a year in 
formaline, are entirely discoloured and have lost all colour- 
markings. Even the bristles, being of calcareous composi- 
tion, appear to undergo, probably in consequence of the 
development of traces of acid in the preserving fluid, consider- 
1) Archiv f. Naturgesch. Jahrg. XXI, Bd. I, 1855, p. 92. 
Notes from the Leyden Museum, Vol. XXXII. 
11** 
