14 



ACAKTHOPTEETGII. 



Ilal). Atlantic Coasts and Eivers from Florida to Brazil, and also in the West-Indian 

 Islands : 



Mexico 13 ; Gulf of Mexico ^.- — Surinam ; Amazons ^ ; Eio Janeiro ^ ; Cuba » lo ii • 

 Martinique. 



Here described from six specimens (including the type oi A. mexicanus) from Mexico 

 and Surinam, from 230 to 500 mm. in total length. 



Golioiiles 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. hroussonctii, whilst the outer series of teeth is much stronger. 



Fam. 4. CAKANGID^. 



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. 



OVujoplites, Jord. & Everm. Bull. U.S. Nat. Miis. xhii. 1896, p. 898. 



Eod}' ovate or fusiform, compressed ; scales lanceolate or linear. itouth rather large, oblique, little 

 protractile ; teeth somewhat small, pointed, in narrow Lauds in the jaws ; vomerine and palatine teeth 

 present. Spinous dorsal of a few short spines, connected by membrane at the base only ; soft dorsal 



Scomhroidcs palohieta. 



long, more or less elevated anteriorly and with the posterior rays much liranchcd and semi-detached as 

 flnlets. Anal similar to soft dorsal, preceded by two s]iines separate liom (he rest of the tin. Tectoral 

 short, asymmetrical : ventrals with I 5 rays, close together, below the base of the pectorals, wilh the 

 inner ray attached to I he abdomen by membrane. Caudal peduncle slender; caudal iin widely forked 



Ilah. Tropical Seas (one species only from fresh-water lakes of Tropical America) 



