eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 497 



337. Cichlasoma severum (Heckel). 

 Heros severus Heckel, Ann. Wiener Mus., II, 1840, 362 (Rio Negro, near Mara- 



bitanos) . 

 Astronotus (Cichlasoma) severus Eigenmann and Eigenmann, Proc. U. S. Nat. 



Mus., XIV, 1891, 68.— Eigenmann and Bray, Ann. N. Y. Acad. Sci., VII, 



1894, 619 (Brazil). 

 Cichlasoma severum Regan, Ann. and Mag. Nat. Hist., (7), XVI, 1905, 322 (Rio 



Cupai; Guiana; Teffe).— von Ihering, Rev. Mus. Paulista, VII, 1907, 330 - 



Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 475. 

 Heros coryphaeus Heckel, Ann. Wiener Mus., II, 1840, 364 (Rio Guapore). 

 Heros modestus Heckel, Ann. Wiener Mus., II, 1840, 366 (Rio Guapore). 

 Heros spurius Heckel, Ann. Wiener Mus., II, 1840, 368 (Rio Guapore). — Gunther, 



Catalogue, IV, 1862. 293 (Guiana; Brazil). 

 Acara (Heros) spuria Steindachner, " Susswasserfische d. Siidostlichen Brasilien," 



i, in SB. Akad. Wiss. Wien, LXX, 1874, 507, pi. 4; ii,LXXI, 1875,83; "Chro- 



miden Amazonenstromes," 1875, 23 (Tabatinga; Tonantins; Coary; Teffe; 



Obidos; Cudajas; Santarem; Gurupa; Xingu, near Porto do Moz; Rio 



Tapajos; Madeira; Guapore; Rio Negro; Rio lea or Putumayo; Rio Hyutay; 



Ambyiacu; Lakes Alexo, Hyanuary, Jose Assu, Saraca (near Silva), and 



Maximo). 

 Heros spurius Pellegrin, "Cichlides," 200, in Mem. Soc. Zool. France, XVI, 1903, 



236 (Ucayale; Teffe; Manaos; Tonantins; Tabatinga). 

 Heros fasciatus Heckel, Ann. Wiener Mus., II, 1840, 372 (Rio Negro). — Gunther, 



Catalogue, IV, 1862, 294. 

 Centrarchus notatus Schomburgk, Fishes Brit. Guiana, II, 1842, 160. 

 Chromys appendiculata Castelnau, Anim. Am. Sud, Poiss., 1855, 15, pi. 7, fig. 3. 

 Chromys fasciata Castelnau, Anim. Am. Sud, Poiss., 1855, 17, pi. 9, fig. 2 (juv.). 

 Uaru centrarchoides Cope, Proc. Acad. Nat. Sci. Phila., 1872, 253, pi. 11, fig. 2 



(juv.) (Ambyiacu). 



One specimen, 62 mm. Lower Potaro. (I. U. Cat. No. 12463.) 



One specimen, 108 mm. Twoca Pan. (C. M. Cat. No. 2294.) 



Head 3; depth 1.7-1.8; D. XVI, 13 or 14; A. VII, 14; scales 30 in a median 

 series, 19 + 12 + -° 6 -; eye 3.3 in the head, 1 in the preorbital, 1.4 in the inter- 

 orbital; 3, .6, and 1 respectively, in the smaller specimens. 



Compressed, pumpkin-seed shaped; caudal peduncle not half as long as deep; 

 mouth small, maxillary not nearly reaching eye; premaxillary-maxillary border 4 

 in the head; outer series of teeth conical, increasing in size forward, few smaller 

 inner teeth; lower lip without a frenum; about nine rakers on the lower arch. 



