DOBULE ROACH. 347 



The specimen taken was a young male fish of six and a 

 half inches long ; the body slender in proportion to its 

 length ; the head compared to the length of the head and 

 body alone, without the caudal rays, is as two to nine ; the 

 depth of the body equal to the length of the head ; the 

 diameter of the eye compared to the length of the head is 

 as two to seven ; the nose rather rounded ; the upper jaw 

 the longest ; the ascending line of the nape and back more 

 convex than any other portion of the dorsal or abdominal 

 line : the first ray of the dorsal fin arising half-way between 

 the anterior edge of the orbit of the eye, and the edge of the 

 fleshy portion of the tail ; the first ray half as long as the. 

 second, which is the longest, and is as long again as the 

 last ray of this fin, the length of the last ray being equal to 

 the length of the base of the fin : the pectoral fin rather long 

 and narrow ; the ventral fins arise just in advance of the line 

 of the origin of the first ray of the dorsal fin ; the distance 

 from the origin of the ventrals to the origin of the anal fin, 

 and from the origin of the last ray of the anal fin to the end 

 of the fleshy portion of the tail, are equal ; the first ray of 

 the anal fin nearly as long again as the last ; the tail consi- 

 derably forked, the external rays being as long again as those 

 in the centre. The scales of the body moderate in size, fifty 

 forming the lateral line, with an oblique row of seven scales 

 above it under the dorsal fin, and four below it ; the lateral 

 line itself concave to the dorsal line throughout its whole 

 length. The fin -rays are in this specimen 



D. 9 : P. 16 : V. 9 : A. 10 : C. 19. 



The colour of the top of the head, nape, and back, dusky 

 blue, becoming brighter on the sides, and passing into silvery 

 white on the belly ; dorsal and caudal fins dusky brown ; 

 pectoral, ventral, and anal fins, pale orange red ; the irides 

 orange ; the cheeks and operculum silvery white. 



