'ICHTHYOLOGY OF VENEZUELA — SCHULTZ 133 



Genus GENYATREMUS Gill 



Genyatremus Gill, Proc. Acad. Nat. Sci. Philadelphia, 1862, p. 256. (Genotype, 

 Diagramma cavifrons Cuvier and Valenciennes = Luiyanifs luteus Bloch.) 



GENYATREMUS LUTEUS (Bloch) 



Lutjanus luteus Bloch, Ichthyologie, ou Histoire naturelle des . . . poissons, vol. 7, 

 p. 89, pi. 247, 1797. 



U.S.N.M. No. 121808, a specimen, 213 mm. in standard length, from market at 



Maracaibo, May 15, 1942. 

 U.S.N.M. No. 121807, a specimen, 112 mm., mouth of Cano de Sagua, 25 km. 



north of Sinamaica, March 12, 1942. 



This characteristic genus and species in general resembles Anisotre- 

 mus but differs in the very narrow preorbital, its least depth is con- 

 tained about 3 times in the eye and 9 times in the head; in addition 

 the gill membranes form a broad fold across the isthmus as in the 

 Kyphosidae, but the gill membranes are naked. In Anisotremus the 

 posterior edge of the gill membranes form an acute angle over the 

 isthmus, and in Genyatremus this is evenly curved. There are no 

 scales on the soft rays or membranes of the dorsal and anal fins, only 

 a sheath of scales basally, in Genyatremus, whereas in Anisotremus the 

 median fins are scaled wholly or in part, always some scales on the 

 interradial membranes. The dorsal rays are XIII, 12 and anal III, 

 10 in both specimens from Venezuela. The pectoral fins are equal in 

 length in the distance from the nostrils to rear of head. The margins 

 of the dorsal fins are blackish; there is some indication of a dark, 

 wide, wedge-shaped saddle in front of the dorsal fin, and another over 

 the region of the orbits, both barely discernible in the alcoholic 



specimens. 



Genus POMADASYS Lacepfede 



Pomadasys LACEPfePE, Histoire naturelle des poissons, vol. 4, p. 515, 1802, 

 (Genotype, Sciaena argentea Forskal.) 



POMADASYS CROCRO (Curier and Valenciennes) 



Pristipoma crocro Cuvier and Valenciennes, Histoire naturelle des poissons, 

 vol. 5, p. 264, 1830 (Martinique). 



The identification is not certain because of small size and lack of 

 intermediate sizes. 



6 specimens, 21 to 33 mm., Rio Guaiguaza, 3 km. west of Puerto Cabello, F. F. 

 Bond, January 15, 1938. 



1 specimen, 22 mm., Rfo Mamo, 15 km. west of La Guaira, F. F. Bond, Novem- 

 ber 11, 1938. 



Genus ORTHOPRISTIS Girard 



Orthopristis Girard, United States and Mexican boundary survey. Ichthyology, 

 p. 15, 1859. (Genotype, Orthopristis duplex Girard = Perco chrysoplerus 

 Linnaeus.) 



