A Bevision of the American Cichlidse. 621 



Crenicichla saxatilis Heckel, 1. c, 432 (name). Giinther, Cat. Fish. Brit. Mas., 

 IV, 308, 1862 (Brazil ; Guiana ; Rio Capin ; Demarara). Boulenger, 

 Proc. Zool. Soc. London, 1887, 275. 



Cichla lahrina Agassiz, Spix Selecta Genera et Spec. Pise, 99, pi. 62, fig. 1, 

 1829 (Brazil). 



Crenicichla lepidota Heckel, 1. c, 429 (Guapore). 



Scarus pavoninus Gronow, Catalogue of Fish, 67, 1854 (Surinam). 



Lower Amazon. 



16. GEOPHAGVS Heckel. 

 § GEOPHAGUS. 



Geophagus Heckel, Fluss-Fische Brasil., in Ann. Wien. Mus., II, 1840, 383 

 (typical species altifrons and dcemon). Giinther, Cat. Fish. Brit. Mus., 

 IV, 315 (surinamensis) . 



Saianoperca Giinther, 1. c, 313, 1862 (sp.). 



Type : Geophagus altifrons Heckel = Sparus surinamensis Bl. 



§ MESOPS. 



Mesops Giinther, Cat. Fish. Brit. Mus., IV, 311, 1862 (cupido and tceniatus). 

 Geophagus (Mesops) Steindachner, Beitr. Kenntn. Chromid. Amazonenstr., 47, 

 1875. E. & E., Proc. U. S. Nat. Mus., 1891. 

 Type : Geophagus cupido Heckel. 



The genera Geophagus and Satanoperca were separated on the 

 presence or absence of scales on the dorsals, a character which has 

 been shown to be variable. Mesops has better claims for an inde- 

 pendent existence, but some species of Geophagus are said to have 

 the eye median in position while young, and we have retained it as 

 a subgenus. ' 



Geopbagus (Mesops) cupido Heckel. 



Geophagus cupido Heck., Fluss-Fische Bras., p. 399, 1840 (Rio Negro ; Rio 



Guapore). Cope, Amer. Phil. Soc, 1878, p. 697 (Peruvian Amazon). 

 Mesops cupido Giinther, Cat. Fish. Brit. Mus., 1862, Vol. IV, p. 311 (Rio Negro ; 



Guapore). 

 Geophagus (Mesops) cupido Steind., Beitr. zur Kenntniss Chrom. Amazonenstr., 



1875, p. 47 (Amazon, near TeflFe ; Coary ; Cudajas ; Lake Hyanuary ; 



Rio Negro ; Guapore ; Iga ; Hyutay ; Sambaia ; and Jatuarana). E. & 



E., Proc. U. S. Nat. Mus., 1891, p. 70 (name). 



The single specimen is probably from Brazil. 



