220 



ON A BHAWANIA-SPECIMEN. 



the rows nearly have the shape of a circle. Each row 

 consists of a left and a right half, each containing in the 

 middle of the body 20 paleae; the median ones of both 

 sides are partly stretching over each other in the middle 

 of the back. The paleae differ somewhat in size in different 

 regions of the body, and in the same row the lateral ones are 

 the longest and extend a little beyond the others. As rightly 

 stated by Ehlers *) these paleae show a great resemblance 

 with the scales of the butterfly-wing; they consist (figs. 2 

 and 3) of a shaft, entirely hidden in the dorsum, and a 

 broad distal division. The shaft, measuring about a third 

 of the total length of the bristle, is faintly knee-like bent 

 and becomes somewhat broader in its upper beneath the 

 cuticula lying portion. 



The distal portion of the bristle has an elongated spoon- 

 like shape, with an arched surface, its convex side being 

 turned upward; its margin is plain, except at its median 

 side, that is bluntly serrated. Both sides of the palea do 

 not have the same structure. Its convex side (fig. 2) shows 

 three strong, longitudinal ridges, one in the middle and 

 one on both lateral area's; the spaces between these ridges 

 are densely beset with small round tubercles, that assume 

 a more transverse shape towards the distal end of the 

 bristle. The concave side of the palea (fig. 3) possesses 14 

 to 15 delicate, longitudinal veins, the median ones of 

 which are prolongating into the shaft; the area's between 

 these veins show a fine transverse striation, like as observed 

 in the shaft of most compound bristles. The paleae have 

 a yellowish hue (by transmitted light) except at the tip, 

 which is colourless; in some of them I observed moreover 

 6 to 7 pale narrow, transverse bands, dividing the total 

 surface in as much transverse fields. The distal portion of 

 a palea measures about 0.25 mm. in length and 0.08 mm. 

 in breadth. 



The paleae of Bhawania are much agreeing with those 



1) Die Borstenwiirmer, p. 84. 



Notes from the Ley den Museum, Vol. XXX. 



