436 Storer on the 
by which the shoals are broken up, and the fish 
frightened away. 
The specimen lying before me, is thirteen and a 
half inches in length. Color upon the back of a 
deep blue tinged with yellow ; sides paler; opercu- 
la, yellow tinged with violet; beneath, silvery. 
Scales large, silvery, deciduous. Abdominal ridge 
indistinctly serrated ; about thirty spines may be 
counted in front of ha ventrals, and fifteen behind 
them. Depth of the specimen at the origin of the 
dorsal fin, one fourteenth the length of the body; 
width at the commencement of the dorsal fin a little 
more than one seventh of the length. Length of 
the head when the mouth is closed, from the ex- 
tremity of the lower jaw, about one seventh of the 
whole length of the fish. Head destitute of scales, 
a depression upon its top, between and back of the 
eyes, exhibiting numerous mucous pores. Eyes 
large and provided with a nictitating membrane ; 
pupil black, irides silvery ; distance between the eyes 
double the diameter of the eye. Nostrils equidistant 
between the eye and the snout. Gape of the mouth 
arge. Jaws furnished with teeth; palate and tongue 
also provided with teeth. 
The Dorsal fin longer than high. 
The Pectorals less than one third as high as long. 
The Ventrals are situated opposite the middle of 
the dorsal fin. 
The Anal is more than one third as high as long; 
its anterior half, the higher. 
The Caudal fin is forked; at its base, width to 
the width of the expanded extremities as 1 to 2. 
ae Ln 
B cue 
