REVIEW OF THE ERYTHRININ^. 105 



any uniformity of variation, one organ varying indiscrimi- 

 nately of another. 



The food of this species consists at least partly of other 

 fishes. 



II. Erythrinus. 



Erythrhms Gronow 17G3, 114 (based on Cypi^inus cylin- 

 driQUslj. = C. cepholus L. in ■psiYt=salmoneas) ; Miiller '42a, 

 308 (sp.); Miiller & Troschel '45a, 5 (sp.); Gthr. '04, 283 

 {unitceniatus , gronovii) . 



Hetererythrinus Gthr. '64, 283 (salmoneus). 



Type : Erythrhms salmoneus Gronow. 



The Erythrinus of Cuvier, Miiller and Giinther is not the 

 Erythrinus of Gronow. The latter has salmoneus for its 

 type, and is identical with Gunther's Ileter erythrinus. 



The species of this genus are smaller and less widely dis- 

 tributed than those of Macrodon. 



ANALYSIS OF THE SPECIES. 



a. Pterygoids with teeth; dorsal rounded. 



h. Caudal blackish; body usually with a dark lateral band; young without 



a humeral spot. unitoiniatus .\ . 



bb. Caudal with four or five cross-bars of spots; sometimes a blackish 



spot near caudal; posterior portion of the body with vertical dark 



streaks. salvus 2. 



aa. Pterygoids without teeth; dorsal fin angular or pointed, some of the 



posterior rays being prolonged. 



c. Ventrals not reaching beyond origin of anal. erythrinus 3. 



cc. Ventrals reaching far beyond origin of anal; posterior dorsal rays 



longer than the head; upper parts and all the tins blackish; crown of 



the head with black dots (Giinther). longipvmis 4. 



1. Erythrinus unitaeniatus. 



Huri; Canhui; Wauben. 



Maturaque Marcgrave, 1648, 169 (in standing water). 



? Synodontis palusiris Bloch & Schneider 1801, 398 (Brazil). 



Erythrinus unitceniatus Spix. '29, 42, pi. 19 (San Francisco); M. & T. 

 '45a, 5, pi. iii, fig. 1 (Brazil; Guiana); C. & V. '46, 486 (Mana; Cay- 

 enne; Bahia); M. & T. 48a, 632 (Canaku mountain streams); 

 Gthr. '64, 283 (Demerara; Surinam; Es-equibo; Kiver Capin, Para; 

 River Capai; Bahia); Gthr. 68a, 239 (Trinidad); Steind. '74a, 28 

 (Eio Parahyba; Victoria; Bahia; Santarem; Villa Bella; Porto do 



