EIGENMANN: the freshwater fishes of BRITISH GUIANA 493 



10; scales 25-27 along a middle line; eye 4 in the head, 1 in the preorbital, 2 in the 

 interorbital in the largest. Eye a little behind the middle of the head in the largest. 



Oval, the dorsal and ventral profiles equally arched; caudal peduncle three- 

 fourths as long as deep; maxillary not reaching the eye, maxillary-premaxillary 

 border 3 in the head. Lower lip with a frenum; five or six gill-rakers on the lower 

 arch. Cheeks with three or four series of scales; preopercle naked; one and one- 

 half to two and one-half scales between the lateral line and the dorsal ; basal parts 

 of the dorsal and anal naked; lateral line not forked on the caudal. 



Dorsal spines subequal from the fourth, the last spine one-half or less than 

 one-half the length of the head; caudal rounded; dorsal and anal sometimes pro- 

 longed; pectoral as long as or longer than the head. 



A dark spot below and behind the eye; a dark band from the eye to the ocel- 

 lated spot at the base of the upper caudal rays; sides with about six cross-bands, 

 the one under the twelfth dorsal spine intensified into a spot below the lateral fine; 

 vertical fins spotted or barred. The general color-markings of the body become 

 obscure with age, those of the fins more intense. 



335. jEquidens geayi (Pellegrin). 



Acara geayi Pellegrin, Bull. Mus. d'Hist. Nat., VIII, 1902, 417; "Cichhdes," 

 142, in Mem. Soc. Zool. France, XVI, 1903, 178, pi. 4, fig. 3 (River Camopi, 

 French Guiana).— Regan, Ann. and Mag. Nat. Hist., (7), XV, 1905, 339 

 (Essequibo ; Cayenne) . 



jEquidens geayi Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 472. 

 One specimen, 108 mm. Crab Falls. (C. M. Cat. No. 2373a.) 

 One specimen, 63 mm. Rockstone. (C. M. Cat. No. 2374o.) 

 Eight specimens, 72-120 mm. Amatuk. (C. M. Cat. No. 2375a-&; I. U. 



Cat. No. 12518.) 



One specimen, 106 mm. Erukin. (C. M. Cat. No. 2376a.) 



Two specimens, 51-103 mm. Creek below Potaro Landing. (C. M. Cat. No. 



2377a; I. U. Cat. No. 12519.) 



One specimen, 98 mm. Konawaruk. (C. M. Cat. No. 2378a.) 



Three specimens, 60-130 mm. Tumatumari. (C. M. Cat. No. 2379a-6; I. 



U. Cat. No. 12520.) 



One specimen, 75 mm. Gluck Island. (C. M. Cat. No. 2380a.) 



One specimen, 97 mm. Packeoo Falls. (C. M. Cat. No. 2381a.) 



Eight specimens, 71-113 mm. Maripicru. (C. M. Cat. No. 2382a-6; I. U. 



Cat. No. 12521.) 



