DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 419 
The second anal spine is strong, and somewhat longer than the third, but not quite as 
long as the fourth of the dorsal fin. Scales above the pectoral fin not conspicuously 
larger than the others. More or less conspicuous oblique brown streaks run along the 
series of scales, and are broken up into series of spots in larger examples. A vertical 
black spot covered by the angle of the preoperculum. 
We possess four examples of this species: three were collected by Capt. Dow at 
Panama; and the fourth is from Puerto Cabello. The largest is 8 inches long. 
35. H@MULON MARGARITIFERUM. (Pl. LXV. fig. 2.) 
Giinth. Proc. Zool. Soc. 1864, p. 147. 
Dey. A. 3... lat. 55, . L. trans. 6/15. 
The height of the body is one-third of the total length (without caudal), the length 
of the head two-sevenths. The diameter of the eye is two-sevenths of the latter, and 
equal to the extent of the snout and to the width of the interorbital space, which is 
very convex. The maxillary extends beyond the vertical from the anterior margin of 
the eye. Preoperculum emarginate behind. Dorsal fin scarcely notched, with the 
soft portion very low; its spines are moderately strong, the fourth is the longest, not 
quite half as long as the head. Anal spines strong; the second is longer and stronger 
than the third, and equal to the eighth of the dorsal. The soft vertical fins enveloped 
in scales; caudal forked, with the upper lobe longest. The pectoral fin does not extend 
to the vent. Greenish olive above, each scale with a pearl-coloured centre; sides 
silvery ; a blackish spot above the axil. 
One specimen, 12 inches long, was obtained by Messrs. Dow and Salvin on the 
Pacific coast of Panama. 
39. CuatTopon HuUMERALIS. (PI. LXV. fig. 3.) 
Giinth. Fish. ii. p. 19. 
I have given a full description of this species (.¢.). The Pacific coast of Central 
America appears to be its true home. Messrs. Salvin and Dow collected three speci- 
mens at Panama; and our other specimens, which we received from the Haslar Collec- 
tion, are probably from Guatemala, from which country Sir J. Richardson, as we 
know, obtained a collection of fishes. I have no doubt that the statement of this 
species extending to the Sandwich Islands is correct. The Panama examples differ 
from the typical specimens only in having an additional black cross band near the 
hind margin of the caudal fin. 
41. PoMACANTHUS ZONIPECTUS. 
Pomacanthodes zonipectus, Gill, Proc. Ac. Nat. Se. Philad. 1862, p. 244. 
11 3 
1D} 93-24" A. 30° 
“The form much resembles that of Pomacanthus. ‘The greatest height equals three- 
3M 2 
