eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 503 



Upper gill-arch with a downward projecting lobe, carrying the gill-rakers at 

 its margin; upper lateral line well separated from the dorsal. Lateral line forked 

 at the caudal; preorbital in adult about twice as wide as the eye. 



Key to the Guiana Species of Geophagus. 

 a. Dorsal and anal scaled at the base in the adult. Caudal densely scaled to near its tip; a large black spot 



on the middle of the sides surinamensis. 



aa. Dorsal and anal naked in the adult; usually a small black spot at the base of the upper caudal rays. 



jurupari. 



341. Geophagus surinamensis (Bloch). (Plate LXVI, fig. 3.) 

 Sparus surinamensis Bloch, Ausl. Fische, 1791, pi. 277, fig. 2 (Surinam). 

 Geophagus surinamensis Muller and Troschel, in Schomburgk, Reisen, III, 



1848, 625 (Lakes Tapacuma, Capoye, and Amucu; swamps of the savannas). 



— Gunther, Catalogue, IV, 1862, 315 (River Capin; Guiana). — Steindach- 



ner, " Chromiden Amazonenstromes," in SB. Akad. Wiss. Wien, LXXXI, 



1875, 63 (Para; Gurupa; Villa Bella; Obidos; Tabatinga; Montalegre; 



Teffe; Coary; Fonteboa; Santarem; Tonantins; Alexo; Jose Assu; Hyan- 



uary; Maximo; Rio Negro; lea; Xingu; Trombetas; Madeira; Guapore; 



Tocantins, near Cameta; Hyutay; Tapajos). — Eigenmann and Eigenmann, 



Proc. U. S. Nat. Mus., XIV, 1891, 71 (name).— Pellegrin, Bull. Mus. d'Hist. 



Nat., VIII, 1902, 182 (Marajo; Para; Santarem; Manaos; Tonantins; 



Tabatinga); "Cichlides," in Mem. Soc. Zool. France, XVI, 1903, 198 (Surinam; 



Brit. Guiana; Cayenne; Cameta; Manaos; Marajo; Tonantins; Ucayale). 



—Regan, Ann. and Mag. Nat. Hist., (7), XVII, 1906,55 (Surinam; Guiana; 



Rio Capin; Obidos; Cameta; Manaos; Teffe). — von Ihering, Rev. Mus. 



Paulista, VII, 1907, 317 (Teffe).— Eigenmann, Repts. Princeton Univ. Exp. 



Patagonia, III, 1910, 478. 



Three specimens, 47, 172, and 180 mm. Crab Falls. (C. M. Cat. No. 2324a- 

 b- I. U. Cat, No. 12491.) 



Two specimens, 170-180 mm. Malali. (C. M. Cat. No. 2325a; I. U. Cat. 

 No. 12492.) 



Five specimens, 52-94 mm. Mud-flats below Wismar. (C. M. Cat. No. 

 2326a-6.) 



Five specimens, 70-112 mm. Wismar. (C. M. Cat. No. 2327a-c; I. U. Cat. 

 No. 12493.) 



Two specimens, 34-37 mm. Tumatumari. (C. M. Cat. No. 2328a; I. U. 

 Cat. No. 12494.) 



Five specimens, 110-120 mm. Bartica. (C. M. Cat. No. 2329a-6; I. U. 

 Cat. No. 12495.) 



