14 ACANTHOPTERYGII. 
Hab. Atlantic Coasts and Rivers from Florida to Brazil, and also in the West-Indian 
Islands: 
Mexico !°; Gulf of Mexico ?.—Surinam ; Amazons‘; Rio Janeiro *; Cuba? 1°"; 
Martinique. 
Here described from six specimens (including the type of A. mexicanus) from Mexico 
and Surinam, from 230 to 500 mm. in total length. 
Gobioides peruanus, Steind., 1880, from Peru and Ecuador, will probably be found 
in the Pacific Coast streams of Central America. The body is more slender and the 
head longer than in G. broussonetii, whilst the outer series of teeth is much stronger. 
Fam. 4. CARANGIDA. 
A large family of the tropical and temperate seas, represented in the fresh-water 
fauna of Central America by a single species. 
SCOMBROIDES, Lacep., 1800. 
Oligoplites, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 898. 
Body ovate or fusiform, compressed; scales lanceolate or linear. Mouth rather large, oblique, little 
protractile ; teeth somewhat small, pointed, in narrow bands in the jaws; vomerine and palatine teeth 
present. Spinous dorsal of a few short spines, connected by membrane at the base only; soft dorsal 
Scombroides palometa. 
long, more or less elevated anteriorly and with the posterior rays much branched and semi-detached as 
finlets. Anal similar to soft dorsal, preceded by two spines separate from the rest of the fin. Pectoral 
short, asymmetrical ; ventrals with I 5 rays, close together, below the base of the pectorals, with the 
inner ray attached to the abdomen by membrane. Caudal peduncle slender ; caudal fin widely forked. 
Hab. Tropical Seas (one species only from fresh-water lakes of Tropical America). 
