ON A BHAWANIA-SPECIMEN. 



219 



NOTE XX. 



ON A BHAWANIA-SPECIMEN , A CONTRIBUTION TO 

 OUR KNOWLEDGE OF THE CHRYSOPETALIDAE 



BY 



Dr. R. HORST. 



(With plate 9). 



Amidst sponges, recently collected by my friend Mr. P. 

 J. Buitendijk in the bay of Batavia, I met with a Polychaete- 

 worm , obviously belonging to the genus Bhawania of 

 Schmarda Though I cannot give full information about 

 its structure, because I had only a single specimen at my 

 disposal with its head so far withdrawn that it was quite 

 invisible, nevertheless I think the present communication 

 not without interest, since Schmarda's description is rather 

 incomplete and there still reigns a good deal of uncertainty 

 about the affinity of the p al e a e-bearing Polychaetae. 



It is a slender, flattened worm, measuring 25 mm. in 

 length and l 1 / 2 mm - m breadth; the body is only slightly 

 tapering at its anal extremity and has about 175 segments. 

 Its colour is yellowish gray with a somewhat paler dorsal 

 border and a median row of black spots at the ventral 

 side; moreover there is a couple of black patches at the 

 base of each foot, forming along the sides of the body a 

 narrow dark band. The dorsum is entirely covered by the 

 paleae (fig. 1), which are arranged in slightly bent transverse 

 rows, with the concavity directed forward ; this concavity 

 increases towards the head and on the anterior segments 



1) Neue Wirbellose-Thiere, Bd. I, 2, 1861, p. 164, pi. 37, figs. 323—325. 

 >Jotes from the Ley den Museum, Vol XXX. 



