DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 427 
I thought it possible for some time that this fish might be identical with Umbrina 
undulata of Girard ; however, as this writer states that the anal spines of U. wndulata 
are feeble, and gives 1/9 for the number of anal rays, we are not justified in identifying 
these two species. 
61. CorviNA cHRysoLEucA. (Pl. LXVII. fig. 1.) 
Allied to C. ronchus. 
D. 10)s55. A. 5 L. lat. 55-56. L. transv. ©. 
The height of the body is contained thrice in the total length (without caudal), the 
length of the head thrice and one-third. Head thick ; snout obtuse, with the upper 
jaw slightly overlapping the lower, as long as the diameter of the eye, which is con- 
tained four times and two-thirds in the length of the head. The maxillary is nearly 
entirely hidden by the preorbital, and extends beyond the vertical from the centre of 
the orbit. Teeth of the outer series of the upper jaw rather stronger than the others. 
Interorbital space slightly convex, only one-third wider than the orbit, its width being 
two-sevenths of the length of the head. Przoperculum with spinous teeth round its 
margin, three on and below the angle being much stronger than the others. Supra- 
scapular denticulated. The second dorsal spine is the strongest, and the third the 
longest, being as long as the postorbital portion of the head. ‘The second anal spine is 
very strong, as long as the longest of the spinous dorsal, and not much shorter than the 
first anal ray. Caudal fin irregularly rounded. Silvery, irregularly mottled with large 
brownish patches shining golden. A young specimen (5 inches long) is more uniform 
silvery. 
Two specimens, 9 inches long, were collected by Capt. Dow at Panama. 
I have observed in this species a most extraordinary variation in the size of the scales 
above the lateral line, such as I do not recollect having seen in other Acanthopterygian 
fishes. ‘The two larger specimens are of nearly the same size; yet the dorsal scales of 
one are only half the size of those of the other. ‘The lateral line is composed of nearly 
the same number of scales in both, and also the scales below the lateral are of nearly 
the same size. 
62. Corvina verMicuLaris. (PI. LXVII. fig. 2. 
D. 10; 24 A, = L. transv. we 
The height of the body is a little more than one-third of the total length (without 
caudal); the length of the head two-sevenths. Head moderately compressed, snout 
obtuse, with the upper jaw overlapping the lower, a little longer than the diameter of 
the eye, which is one-fifth of the length of the head. The maxillary is entirely hidden 
by the preorbital, and extends somewhat beyond the vertical from the centre of the 
orbit. Teeth of the outer series of the upper jaw rather stronger than the others. 
Interorbital space convex, only one-fourth wider than the orbit, its width being one- 
3N2 
