408 DE. GUNTHEE ON THE FISHES OF CENTEAL AMEEICA. 



tlie 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. 

 (iill, Proc. Ac. Nat. Sc. Philad. 186.3, p. 163. 



D. S\L A. I L. lat. 51. L. transv. 714. 



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. Pra^orbital 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 EXSiFERUS. 

 Poey, Mem. Cub. ii. p. 122, pi. 12. fig. 1. 



D. 8 1 1. A. I L. lat. 53. 



Seven longitudinal series of scales between the origin of the second dorsal fin and the 

 Interal line. The height of the body is one-fourth of the total length (without caudal), 

 the length of the head two-fifths. Praeorbital 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. Godraan collected a specimen. 12 inches long, at Belize. 



