408 DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 
the distance of its base from the anal. Air-bladder without appendages anteriorly. 
Silvery; upper parts and fins greenish ; lateral line not black. 
This species occurs in Cuba; we have received it from San Domingo, Jamaica, and 
Bahia. Messrs. Dow and Salvin collected a specimen in the Chagres River. 
5. CENTROPOMUS ARMATUS. 
Gill, Proce. Ac. Nat. Sc. Philad. 1863, p. 163. 
D. 8]. A.2._L. lat..51. L. transv. 7/14. 
Six longitudinal series of scales between the origin of the second dorsal fin and the 
lateral line. The height of the body is contained from thrice and two-fifths to thrice 
and three-fourths in the total length (without caudal); the length of the head twice 
and a half. Preeorbital serrated in its hinder half; suboperculum produced into a long 
flap, which extends beyond the vertical from the origin of the dorsal fin. The inter- 
maxillary extends scarcely to below the middle of the orbit. Dorsal spines of moderate 
strength ; the third is the longest, and half as long as the head. The second anal spine 
is exceedingly strong, much stronger than the third, and longer than the third dorsal 
spine. The length of the ventral fin is scarcely more than one-half of the distance of 
its base from the anal. Silvery; dorsal fins, a blotch on the opercle, and the membrane 
between the anal spines blackish. Lateral line not black. 
Several specimens, 12 inches long, were collected by Mr. Salvin at Chiapam. 
6. CENTROPOMUS ENSIFERUS. 
Poey, Mem. Cub. ii. p. 122, pl. 12. fig. 1. 
D. 8| 5 Ag L. lat. 68. 
Seven longitudinal series of scales between the origin of the second dorsal fin and the 
lateral line. ‘The height of the body is one-fourth of the total length (without caudal), 
the length of the head two-fifths. Praorbital coarsely serrated ; suboperculum pro- 
duced into a flap, which extends to the vertical from the origin of the dorsal fin. The 
intermaxillary extends scarcely to below the middle of the orbit. Dorsal spines of 
moderate strength; the third and fourth are the longest, and two-fifths as long as the 
head. The second anal spine is exceedingly strong, much stronger than the third, and 
much longer than the dorsal spines. The length of the ventral fin is somewhat more 
than one-half of the distance of its base from the anal. Silvery; dorsal fin, a blotch on 
the opercle, and the membrane between the anal spines blackish. Lateral line not 
black. 
This species occurs in Cuba; we have received it from Jamaica and from the Guyanas. 
Mr. Godman collected a specimen, 12 inches long, at Belize. 
