A NEW GENUS OF GANOID FISH. 473 



Of head, above, from snout to commencement of scales of body, |# of an 

 inch. 



Laterally, from snout to upper and posterior angle of operculum, a little more 

 than £$ of an inch. 



Eyes, rather less than -^ of an inch across. 



From point of snout to base of spine of first dorsal finlet, 4 1- inches. 



From spine of first dorsal finlet to extremity of caudal fin-rays, 5£j inches. 



From point of snout to anal openings, 8^-J inches. 



From anal openings to extremity of body (not including caudal fin-rays), 

 |§ of an inch. 



From anal openings to extremity of caudal fin-rays £§■ of an inch. 



From extremity of body to extremity of caudal fin-rays, ^ of an inch. 



Breadth, or Transverse Measurements. 

 Of head, across operculum, about f of an inch. 



Of body, behind origin of pedicles of pectoral fin, -fa of an inch ; the body then 

 increases rapidly in breadth, and at the distance of one inch behind 

 the pectoral fins, measures about f of an inch. 

 „ at the first dorsal finlet, f of an inch. 

 „ at the second, fa of an inch. 

 „ at the sixth, \ of an inch. 

 „ at the ninth, fa of an inch. 



„ at the caudal extremity of the body, immediately behind the anal fin, 

 rather less than fa of an inch. 



Depth, or Vertical Measurements. 

 Of head, over pre-operculum, \ of an inch. 

 Of body, opposite the origin of the pectoral fins, -fa of an inch. 



,, at the distance of one inch behind the pectoral fins, -fa of an inch. 



,, at the first dorsal finlet, -fa of an inch. 



„ at the second dorsal finlet, rather less than fa of an inch. 



,, at the sixth, about fa of an inch. 



,, at the tenth, rather less than T ^ of an inch. 



„ at the caudal extremity of the body, immediately behind the anal 

 fin, ^ of an inch. 



Additional Specimens of the Female Fish, and Varieties in Character. 



Several additional specimens of the female fish were also examined; and 

 similar varieties in the minuter details of their characters were found to exist 

 among them, as in the males. Some small range was found to exist in the 

 relative proportions of the head and the body. 



Scales. — The series of scales over the fish were generally in regular single 



VOL. XXIV. PART II. 6 M 



