25. 



CH^ETODON T YRWHITTI . 



Order, Thoracic. 



Native Name, O^/OO"). Radeya. 



C. tyrwhitti. Body yellowish on the upper part, graduating- to a pale 

 gray beneath ; five perpendicular equidistant dark stripes graduated below, 

 dark spots intervening. Dorsal fin striated between each spine with grey 

 on yellow, the upper parts terminating diagonally in bluish grey. Head of the 

 prevailing grey, with a pink hue and dark mark on the chief plate. Eye near 

 the mouth ; iris silvery, but remarkably dull. 



Branchiostegous rays 4. Dorsal 23, thirteen spinous. Pectoral 14. 

 Ventral 6, one spinous. Anal 13, two spinous. Caudal 16. 



The Radeya of the Cingalese inhabits rocky situations, and 

 although it rarely exceeds five inches in length, is sought affer, and 

 esteemed a wholesome food. It is occasionally found at a consider- 

 able distance from the mouths of fresh-water rivers, and beyond the 

 influence of the tides. Radeya is one of those names given by the 

 native fishers, the derivation of which cannot be discovered, but 

 the classical denomination has been suggested by the sincerest feel- 

 ings of grateful esteem and respect. 



Figure — The natural size of the Specimen. 



