118 THE GENERA OF FISHES 



In this paper the genus Gerres is mentioned for the first time. But two 

 species are named, G. vaigiensis and G. gula. The former belongs to the modern 

 genus Xyst.ima Jordan & Evermann, the latter to Eucinostomus Baird. When 

 Gerres was later defined by Cuvier in the Rcgnc Animal, Sci.ena argyrea, which 

 is identical with G. vaigiensis, is included, and G. gula is not mentioned. It would 

 appear that G. vaigiensis must be taken as type, thus replacing Xyst.«ma. 



Jordan & Evermann have taken an American species, Gerres lineatus (Hum- 

 boldt) as type. This species is named by Cuvier, but not by Quoy & Gaimard. It 

 cannot therefore serve as the type of Gerres. The genus called Gerres by Jordan 

 & Evermann must apparently stand as Diapterus Ranzani. If Gerres is regarded 

 as preoccupied by Gerris Fabricius, a genus of insects of earlier date, the sub- 

 stitute name of Catoch.enum Cantor, 1850, should be used. 



Percophis Quoy & Gaimard, 351 ; type Percophis br.asilianus O. & G. 



Monotypic. 

 Priodon (Cuvier) Quoy & Gaimard, 377; type Priodon annulatus Q. 

 • & G. ~ 



A species of Naso Lacepede. 



CXVIII (A). HARLAN, Saurocephalus: Journ. Ac. Nat. Sci. Phila., 



Ill (fossil fish), 1S24. 



Richard Harlan. 



Saurocephalus Harlan, 339; type Saurocephalus lanciformis Harlan. 



CXIX. K(J)NIG, Iconcs t'ossiles Sectione, 1825. 



C. KoNIG. 



Bucklandium Konig, 4; type Buckl.xndium Dir.uvn Konig. 



Monotypic. 



Ampheristus Konig, pi. XV', fig. 190; type Ampheristus toliacus 

 Konig. 

 Monotypic. 



CXX. BOWDICH, Pishes of Madeira, 1825. 



T. Edward P.owdich. 



Labeo Bowdich, 122; type Labeo .sp.aroides Bowdich. 

 A sparoid fish; not Laueo Cuvier, 1817. 



