510 MEMOIRS OF THE CARNEGIE MUSEUM 



Catalogue, IV, 1862, 304 (Dcmerara).— Pellegrin, Bull. Mus. d'Hist, Nat., 



VIII, 1902, 182 (Para; Manaos; Teffe; Tonantins); "Cichlides," in Mem. 



Soc. Zool. France, XVI, 1903, 148 (Orinoco; Brit. Guiana; Cayenne; Maroni; 



Rio Yapura; Amazonas). — von Ihering, Rev. Mus. Paulista, VII, 1907, 292. 



— Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 469. 

 Cychla flavo-maculata Schomburgk, Fishes Brit. Guiana, II, 1843, 145, pi. 6 (Rio 



Negro and Padauiri). 

 Cychla nigro-maculata Schomburgk, Fishes Brit. Guiana, II, 1843, 151, pi. 9 (Rio 



Negro, Padauiri). 

 Acharnes speciosus Muller and Troschel, in Schomburgk, Reisen, III, 1848, 622; 



Hora? Ichth., Ill, 1849, 27, pi. 5, fig. 3 (mouth of Essequibo). — Gunther, 



Catalogue, III, 1861, 369. 



For a full list of references to the nominal species of ocellaris see Pellegrin. 



The best food fish in Guiana. 



One specimen, about 600 mm. Tumatumari. (C. M. Cat. No. 2276.) 



One specimen (a head). Rockstone. (I. U. Cat. No. 12449.) 



One specimen, 249 mm. Rockstone. (C. M. Cat. No. 2275.) 



Two specimens, 225-237 mm. Tumatumari. (C. M. Cat, No. 2277; I. U. 

 Cat. No. 22450.) 



Two specimens, 170-192 mm. Twoca Pan. (C. M. Cat. No. 2278; I. U. 

 Cat. No. 22451.) 



Two specimens, 121-137 mm. Gluck Island. (C. M. Cat. No. 2279; I. U. 

 Cat. No. 22452.) 



Seven specimens, 215-300 mm. Lama Stop-Off. (C. M. Cat. No. 22S0a-b; 

 I. 17. Cat, No. 22453.) 



One hundred eighty-two specimens, 40-55 mm. Rockstone Stelling. (C. M. 

 Cat. No. 2281a-z; I. U. Cat. No. 12454.) 



One specimen, 116 mm. Warraputa. (C. M. Cat. No. 2282.) 



Head 3; depth 3-3.5; D. XV,17; A. 111,11 or 12; scales about 85 in a series 

 below the lateral line; eye 3.5-5.5 in the head, .8-1.25 in the interorbital. 



Compressed, perciform; head deep, the lower jaw projecting, maxillary extend- 

 ing to below anterior margin of the eye. Teeth in narrow bands; gill-rakers 5 + 16, 

 strong, the largest 2 in the eye; dorsal mostly naked, a row of scales on the anterior 

 raj^s; caudal scaled except a narrow margin; anterior part of anal scaled. About 

 thirteen scales between the end of the upper lateral line and the dorsal. Dorsal 

 deeply notched; caudal truncate, faintly notched in the young. 



The color changes notably with age. In the smallest a dark streak from snout 



