A Revision of the American Gichlidae. 623 



Geophagus megasema Heckel, Fluss-Fische Brasiliens, 388, 1840 (Guapore). 

 Chromis prorima Casteln., "Anim. Nouv. on Rares de I'Am^r. Slid. Poiss., 14, 



pi. vii, fig. 1, 1855 (Ucayale, Peru)." 

 Satanoperca proxima Grlinther, Cat. Fish. Brit. Mus., IV, 71, 1891 (copied). 



The specimens examined are from the Falls of the Tapajos ; 

 Itaituba ; and Cameta. 



Geophagus brasiliensis Quoy & Gaimard. 



Chromis hrasiliensis Q. & G., " Voy. Uran. Zool. Poiss., 286." 



Geophagus hrasiliensis Heckel, in " Kner Fische der Novara Exped., 266, pi. x, 

 fig. 3." Hensel, Wirbelth. Siidbras., 59, 1868 (Rio Janeiro; Porto 

 Alegre). Steindachner, Siiswasserf. Siidostl. Bras., 13, pi. ii & iii, 1874 

 (Rio Cadea, Rio Santa Maria, in Rio Grande do Sul ; Rio Parahyba, near 

 Campos and Mendez ; Rio Novo and Rio Muriahe, tribts. of Parahyba ; 

 rivers and lakes near S. Antonio de Sa ; Rio Macalie ; Rio de S. Joao ; 

 Rio Quenda, near Santa Cruz ; Rio S. Matheos ; Rio Arrasuaby ; Itaba- 

 puana ; Rio Mucuri, above Porto Alegre and at Santa Clara; Canna- 

 vierias, at the union of rios Pardo, Salsa, Jundiahy, and .Jequitin- 

 honha ; Rio Paraguassu, near Bahia). E. & E., Proc. U. S. Nat. Mus., 

 1891, 71 (name). 



Chromis unipunciata Castelnau, •* Anim. Nouv. ou Rares de I'Amer. Sud. Poiss., 

 13, pi. viii, fig. 2 (juv.)." 



Acara unipunctafa Glinther, Cat. Fisb. Brit. Mus., IV, 283, 1862 (name). 



Chromys unimaculata Castelnau, 1. c, "13, pi. vii, fig. 2 (adult mas.)." 



Geophagus rhabdotus Hensel, 1. c, 60 (Rio Cadea). 



Geophagus gymnogenus Hensel, 1. c, 61 (mountain streams of Rio Grande do 

 Sul). 



Geophagus bucephahis Hensel, 1. c, 63 (Rio Cadea). 



Geophagus labiatus Hensel, 1. c, 64 (Rio Santa Maria). 



16. SARACA Steindachner. 



Saraca Steindachner, Beitr. Kenntn. Chromid. Amazonenstr., 65, 1875 (oper- 

 culai'is). 

 Type : Saraca opercularis Steind. 



Saraca opercularis Steindachner. 

 Saraca opercularis Steind., 1. e. (Lake Saraca ; Villa Bella). 



17. SYMPHYSODON Heckel. 



Symphysodon Heckel, Fluss-Fische Bras, in Ann. Wien. Mus., II, 1840, 332 

 {discus). 

 Type : Symphysodon discus Heckel. 



This genus is composed of but a single species. 

 Annals N. Y. Acad. Sci., VII, Jan. 1894.— 41 



