ICHTHYOLOGY OF VENEZUELA — SCHULTZ 137 



Genus ARCHOSARGUS Gill 



Sargo 



Archosargus Gill, Can. Nat., vol. 2, p. 266, 1865. (Genotype, Sparus prohatoce- 

 ■phalus Walbaum.) 



ARCHOSARGUS UNIMACULATUS (Bloch) 



Perca unimaculata Bloch, Naturgeschichte der auslandischen Fische, vol. 6, pi. 



308, fig. 1, 1792 (Brazil). 

 Sargus unimaculatvs Metzelaar, Report on the fishes collected by Dr. J. Boeke 



in the Dutch West Indies 1904-1905, p. 88, 1919 (Guanta, Venezuela). 



U.S.N.M. No. 123126, 2 specimens, 179 and 194 mm. in standard length, 

 Amuay Bay, U. S. S. Niagara, May 15, 1925. 



U.S.N.M. No. 123125, 1 specimen, 88 mm., Amuay Bay, U. S. S. Niagara, 

 December 9, 1924. 



U.S.N.M. No. 123124, 1 specimen, 24 mm., Point MacoUa, U. S. S. Niagara, 

 April 19, 1925. 



ARCHOSARGUS ARIES (Cuvier) 



Sargo 



Sargus aries Cuvier, in Cuvier and Valenciennes, Histoire naturelle des poissons, 

 vol. 6, p. 58, 1830 (Rio de Janeiro; Lago de Maracaibo). 



Archosargus aries Jordan, Evermann, and Clark, Rep. U. S. Comm, Fisheries, 

 1928, p. 338, 1930 (Maracaibo). 



U.S.N.M. No. 123127, 1 specimen, 227 mm. in standard length, Amuay Bay, 

 U. S. S. Niagara, May 15, 1925. 



Genus DIPLODUS Rafinesque 



Diplodus Rafinesqite, Indice d'ittiologia siciliana, p. 54, 1810. (Genotype, 

 Sparus annularis Linnaeus.) (Ref. copied.) 



DIPLODUS ARGENTEUS (Cuvier) 



Sargo 



Sargus argenteus Cuvier, in Cuvier and Valenciennes, Histoire naturelle des 

 poissons, vol. 6, p. 60, 1830 (Brazil). 



U.S.N.M. No. 123128, 1 specimen, 218 mm. in standard length, Estanques 

 Bay, U. S. S. Niagara, December 11, 1924. 



Family GERRIDAE: Mojarras; Carpetas 



The following abridged key to the genera of Gerridae was extracted 

 from a manuscript on West Indian fishes by Luis Rene Rivas, of Cuba, 

 through his kindness and with his permission: 



la. Preopercular margin entire; second dorsal spine about equal to or shorter 

 than distance between tip of snout and posterior margin of orbit; second 

 anal spine shorter than caudal peduncle, more than 6 in standard length; 

 greatest depth of body 2.3 to 3.3, usually 2.4 to 3.2 in standard length; 

 maxillary usually not quite reaching to vertical from anterior margin of 

 pupil; air bladder ending posteriorly in a median extension, or in a pair of 

 diverticula; anterior interhaemal bone simple, or with a funnel or spoon- 

 shaped cavity. 



